mirror of
https://gitlab.com/shorewall/code.git
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Modularize NAT
git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@4454 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb
This commit is contained in:
teastep
parent
6640720954
commit
44b8b78bf1
@ -641,262 +641,6 @@ disable_critical_hosts()
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done
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}
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#
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# Set up ipsec tunnels
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#
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setup_tunnels() # $1 = name of tunnels file
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{
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local inchain
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local outchain
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local source
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local dest
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setup_one_ipsec() # $1 = Tunnel Kind $2 = gateway zones
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{
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local kind=$1 noah=
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case $kind in
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*:*)
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noah=${kind#*:}
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[ $noah = noah -o $noah = NOAH ] || fatal_error "Invalid IPSEC modifier $noah in tunnel \"$tunnel\""
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kind=${kind%:*}
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;;
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esac
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[ $kind = IPSEC ] && kind=ipsec
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options="-m state --state NEW -j ACCEPT"
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addrule2 $inchain -p 50 $source -j ACCEPT
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addrule2 $outchain -p 50 $dest -j ACCEPT
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if [ -z "$noah" ]; then
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run_iptables -A $inchain -p 51 $source -j ACCEPT
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run_iptables -A $outchain -p 51 $dest -j ACCEPT
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fi
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run_iptables -A $outchain -p udp $dest --dport 500 $options
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if [ $kind = ipsec ]; then
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run_iptables -A $inchain -p udp $source --dport 500 $options
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else
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run_iptables -A $inchain -p udp $source --dport 500 $options
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run_iptables -A $inchain -p udp $source --dport 4500 $options
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fi
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for z in $(separate_list $2); do
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if validate_zone $z; then
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if [ -z "$POLICY_MATCH" ]; then
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addrule ${z}2${FW} -p 50 $source -j ACCEPT
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addrule ${FW}2${z} -p 50 $dest -j ACCEPT
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if [ -z "$noah" ]; then
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addrule ${z}2${FW} -p 51 $source -j ACCEPT
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addrule ${FW}2${z} -p 51 $dest -j ACCEPT
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fi
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fi
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if [ $kind = ipsec ]; then
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addrule ${z}2${FW} -p udp $source --dport 500 $options
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addrule ${FW}2${z} -p udp $dest --dport 500 $options
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else
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addrule ${z}2${FW} -p udp $source --dport 500 $options
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addrule ${FW}2${z} -p udp $dest --dport 500 $options
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addrule ${z}2${FW} -p udp $source --dport 4500 $options
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addrule ${FW}2${z} -p udp $dest --dport 4500 $options
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fi
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else
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fatal_error "Invalid gateway zone ($z) -- Tunnel \"$tunnel\""
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fi
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done
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progress_message_and_save " IPSEC tunnel to $gateway defined."
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}
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setup_one_other() # $1 = TYPE, $2 = protocol
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{
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addrule2 $inchain -p $2 $source -j ACCEPT
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addrule2 $outchain -p $2 $dest -j ACCEPT
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progress_message_and_save " $1 tunnel to $gateway compiled."
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}
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setup_pptp_client()
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{
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addrule2 $outchain -p 47 $dest -j ACCEPT
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addrule2 $inchain -p 47 $source -j ACCEPT
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addrule2 $outchain -p tcp --dport 1723 $dest -j ACCEPT
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progress_message_and_save " PPTP tunnel to $gateway defined."
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}
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setup_pptp_server()
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{
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addrule2 $inchain -p 47 $source -j ACCEPT
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addrule2 $outchain -p 47 $dest -j ACCEPT
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addrule2 $inchain -p tcp --dport 1723 $source -j ACCEPT
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progress_message_and_save " PPTP server defined."
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}
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setup_one_openvpn() # $1 = kind[:port]
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{
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local protocol=udp
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local p=1194
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case $1 in
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*:*:*)
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protocol=${1%:*}
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protocol=${protocol#*:}
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p=${1##*:}
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;;
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*:tcp|*:udp|*:TCP|*:UDP)
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protocol=${1#*:}
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;;
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*:*)
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p=${1#*:}
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;;
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esac
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addrule2 $inchain -p $protocol $source --dport $p -j ACCEPT
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addrule2 $outchain -p $protocol $dest --dport $p -j ACCEPT
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progress_message_and_save " OPENVPN tunnel to $gateway:$protocol:$p defined."
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}
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setup_one_openvpn_server() # $1 = kind[:port]
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{
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local protocol=udp
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local p=1194
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case $1 in
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*:*:*)
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protocol=${1%:*}
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protocol=${protocol#*:}
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p=${1##*:}
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;;
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*:tcp|*:udp|*:TCP|*:UDP)
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protocol=${1#*:}
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;;
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*:*)
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p=${1#*:}
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;;
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esac
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addrule2 $inchain -p $protocol $source --dport $p -j ACCEPT
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addrule2 $outchain -p $protocol $dest --sport $p -j ACCEPT
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progress_message_and_save " OPENVPN server tunnel from $gateway:$protocol:$p defined."
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}
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setup_one_openvpn_client() # $1 = kind[:port]
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{
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local protocol=udp
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local p=1194
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case $1 in
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*:*:*)
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protocol=${1%:*}
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protocol=${protocol#*:}
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p=${1##*:}
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;;
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*:tcp|*:udp|*:TCP|*:UDP)
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protocol=${1#*:}
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;;
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*:*)
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p=${1#*:}
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;;
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esac
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addrule2 $inchain -p $protocol $source --sport $p -j ACCEPT
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addrule2 $outchain -p $protocol $dest --dport $p -j ACCEPT
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progress_message_and_save " OPENVPN client tunnel to $gateway:$protocol:$p defined."
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}
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setup_one_generic() # $1 = kind:protocol[:port]
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{
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local protocol
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local p=
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case $1 in
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*:*:*)
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p=${1##*:}
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protocol=${1%:*}
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protocol=${protocol#*:}
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;;
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*:*)
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protocol=${1#*:}
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;;
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*)
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protocol=udp
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p=5000
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;;
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esac
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p=${p:+--dport $p}
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addrule2 $inchain -p $protocol $source $p -j ACCEPT
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addrule2 $outchain -p $protocol $dest $p -j ACCEPT
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progress_message_and_save " GENERIC tunnel to $1:$p defined."
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}
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strip_file tunnels $1
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while read kind z gateway z1; do
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expandv kind z gateway z1
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tunnel="$(echo $kind $z $gateway $z1)"
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if validate_zone $z; then
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inchain=${z}2${FW}
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outchain=${FW}2${z}
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gateway=${gateway:-0.0.0.0/0}
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source=$(source_ip_range $gateway)
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dest=$(dest_ip_range $gateway)
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case $kind in
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ipsec|IPSEC|ipsec:*|IPSEC:*)
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setup_one_ipsec $kind $z1
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;;
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ipsecnat|IPSECNAT|ipsecnat:*|IPSECNAT:*)
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setup_one_ipsec $kind $z1
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;;
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ipip|IPIP)
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setup_one_other IPIP 4
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;;
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gre|GRE)
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setup_one_other GRE 47
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;;
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6to4|6TO4)
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setup_one_other 6to4 41
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;;
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pptpclient|PPTPCLIENT)
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setup_pptp_client
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;;
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pptpserver|PPTPSERVER)
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setup_pptp_server
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;;
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openvpn|OPENVPN|openvpn:*|OPENVPN:*)
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setup_one_openvpn $kind
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;;
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openvpnclient|OPENVPNCLIENT|openvpnclient:*|OPENVPNCLIENT:*)
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setup_one_openvpn_client $kind
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;;
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openvpnserver|OPENVPNSERVER|openvpnserver:*|OPENVPNSERVER:*)
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setup_one_openvpn_server $kind
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;;
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generic:*|GENERIC:*)
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setup_one_generic $kind
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;;
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*)
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error_message "WARNING: Tunnels of type $kind are not supported:" \
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"Tunnel \"$tunnel\" Ignored"
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;;
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esac
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else
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error_message "ERROR: Invalid gateway zone ($z)" \
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" -- Tunnel \"$tunnel\" Ignored"
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fi
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done < $TMP_DIR/tunnels
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}
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#
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# Setup Proxy ARP
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#
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@ -1290,84 +1034,6 @@ __EOF__
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}
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#
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# Setup Static Network Address Translation (NAT)
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#
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setup_nat() {
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local external= interface= internal= allints= localnat= policyin= policyout=
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validate_one() #1 = Variable Name, $2 = Column name, $3 = value
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{
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case $3 in
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Yes|yes)
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;;
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No|no)
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eval ${1}=
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;;
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*)
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[ -n "$3" ] && \
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fatal_error "Invalid value ($3) for $2 in entry \"$external $interface $internal $allints $localnat\""
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;;
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esac
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}
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do_one_nat() {
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local add_ip_aliases=$ADD_IP_ALIASES iface=${interface%:*}
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if [ -n "$add_ip_aliases" ]; then
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case $interface in
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*:)
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interface=${interface%:}
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add_ip_aliases=
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;;
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*)
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[ -n "$RETAIN_ALIASES" ] || save_command del_ip_addr $external $iface
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;;
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esac
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else
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interface=${interface%:}
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fi
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validate_one allints "ALL INTERFACES" $allints
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validate_one localnat "LOCAL" $localnat
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if [ -n "$allints" ]; then
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addnatrule nat_in -d $external $policyin -j DNAT --to-destination $internal
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addnatrule nat_out -s $internal $policyout -j SNAT --to-source $external
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else
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addnatrule $(input_chain $iface) -d $external $policyin -j DNAT --to-destination $internal
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addnatrule $(output_chain $iface) -s $internal $policyout -j SNAT --to-source $external
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fi
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[ -n "$localnat" ] && \
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run_iptables2 -t nat -A OUTPUT -d $external $policyout -j DNAT --to-destination $internal
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if [ -n "$add_ip_aliases" ]; then
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list_search $external $ALIASES_TO_ADD || \
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ALIASES_TO_ADD="$ALIASES_TO_ADD $external $interface"
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fi
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}
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#
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# At this point, we're just interested in the network translation
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#
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> $STATEDIR/nat
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if [ -n "$POLICY_MATCH" ]; then
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policyin="-m policy --pol none --dir in"
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policyout="-m policy --pol none --dir out"
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fi
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[ -n "$RETAIN_ALIASES" ] || save_progress_message "Setting up one-to-one NAT..."
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while read external interface internal allints localnat; do
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expandv external interface internal allints localnat
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do_one_nat
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progress_message_and_save " Host $internal NAT $external on $interface"
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done < $TMP_DIR/nat
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}
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#
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# Delete existing Static NAT
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#
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@ -1390,34 +1056,6 @@ fi
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__EOF__
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}
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#
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# Setup Network Mapping (NETMAP)
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#
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setup_netmap() {
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while read type net1 interface net2 ; do
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expandv type net1 interface net2
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list_search $interface $ALL_INTERFACES || \
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fatal_error "Unknown interface $interface in entry \"$type $net1 $interface $net2\""
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case $type in
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DNAT)
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addnatrule $(input_chain $interface) -d $net1 -j NETMAP --to $net2
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;;
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SNAT)
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addnatrule $(output_chain $interface) -s $net1 -j NETMAP --to $net2
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;;
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*)
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fatal_error "Invalid type $type in entry \"$type $net1 $interface $net2\""
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;;
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esac
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progress_message_and_save " Network $net1 on $interface mapped to $net2 ($type)"
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done < $TMP_DIR/netmap
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}
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#
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# Setup ECN disabling rules
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#
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@ -4541,420 +4179,6 @@ rules_chain() # $1 = source zone, $2 = destination zone
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fi
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}
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#
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# Set up Source NAT (including masquerading)
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#
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setup_masq()
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{
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do_ipsec_options() {
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local options="$(separate_list $ipsec)" option
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policy="-m policy --pol ipsec --dir out"
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for option in $options; do
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case $option in
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[Yy]es) ;;
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strict) policy="$policy --strict" ;;
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next) policy="$policy --next" ;;
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reqid=*) policy="$policy --reqid ${option#*=}" ;;
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spi=*) policy="$policy --spi ${option#*=}" ;;
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proto=*) policy="$policy --proto ${option#*=}" ;;
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mode=*) policy="$policy --mode ${option#*=}" ;;
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tunnel-src=*) policy="$policy --tunnel-src ${option#*=}" ;;
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tunnel-dst=*) policy="$policy --tunnel-dst ${option#*=}" ;;
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reqid!=*) policy="$policy ! --reqid ${option#*=}" ;;
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spi!=*) policy="$policy ! --spi ${option#*=}" ;;
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proto!=*) policy="$policy ! --proto ${option#*=}" ;;
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mode!=*) policy="$policy ! --mode ${option#*=}" ;;
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tunnel-src!=*) policy="$policy ! --tunnel-src ${option#*=}" ;;
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tunnel-dst!=*) policy="$policy ! --tunnel-dst ${option#*=}" ;;
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*) fatal_error "Invalid IPSEC option \"$option\"" ;;
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esac
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done
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}
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setup_one() {
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local add_snat_aliases=$ADD_SNAT_ALIASES pre_nat= policy= destnets=
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[ "x$ipsec" = x- ] && ipsec=
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case $ipsec in
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Yes|yes)
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[ -n "$POLICY_MATCH" ] || \
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fatal_error "IPSEC=Yes requires policy match support in your kernel and iptables"
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policy="-m policy --pol ipsec --dir out"
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;;
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No|no)
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[ -n "$POLICY_MATCH" ] || \
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fatal_error "IPSEC=No requires policy match support in your kernel and iptables"
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policy="-m policy --pol none --dir out"
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;;
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*)
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if [ -n "$ipsec" ]; then
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do_ipsec_options
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elif [ -n "$POLICY_MATCH" ]; then
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policy="-m policy --pol none --dir out"
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fi
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;;
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esac
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case $fullinterface in
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+*)
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pre_nat=Yes
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fullinterface=${fullinterface#+}
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;;
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esac
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case $fullinterface in
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*::*)
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add_snat_aliases=
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destnets="${fullinterface##*:}"
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fullinterface="${fullinterface%:*}"
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;;
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*:*:*)
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# Both alias name and networks
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destnets="${fullinterface##*:}"
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fullinterface="${fullinterface%:*}"
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;;
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*:)
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add_snat_aliases=
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fullinterface=${fullinterface%:}
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;;
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*:*)
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# Alias name OR networks
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case ${fullinterface#*:} in
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*.*)
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# It's a networks
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destnets="${fullinterface#*:}"
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fullinterface="${fullinterface%:*}"
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;;
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*)
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#it's an alias name
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;;
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esac
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;;
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*)
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;;
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esac
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interface=${fullinterface%:*}
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if ! list_search $interface $ALL_INTERFACES; then
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fatal_error "Unknown interface $interface"
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fi
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if [ "$networks" = "${networks%!*}" ]; then
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nomasq=
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else
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nomasq="${networks#*!}"
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networks="${networks%!*}"
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fi
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source="${networks:=0.0.0.0/0}"
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detectinterface=
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case $source in
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*.*.*|+*|!+*)
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;;
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*)
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detectinterface=$networks
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networks=
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;;
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esac
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[ "x$proto" = x- ] && proto=
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[ "x$ports" = x- ] && ports=
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if [ -n "$proto" ]; then
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||||
displayproto="($proto)"
|
||||
|
||||
case $proto in
|
||||
tcp|TCP|udp|UDP|6|17)
|
||||
if [ -n "$ports" ]; then
|
||||
displayproto="($proto $ports)"
|
||||
|
||||
listcount=$(list_count $ports)
|
||||
|
||||
if [ $listcount -gt 1 ]; then
|
||||
case $ports in
|
||||
*:*)
|
||||
if [ -n "$XMULTIPORT" ]; then
|
||||
if [ $(($listcount + $(list_count1 $(split $ports) ) )) -le 16 ]; then
|
||||
ports="-m multiport --dports $ports"
|
||||
else
|
||||
fatal_error "More than 15 entries in port list ($ports)"
|
||||
fi
|
||||
else
|
||||
fatal_error "Port Range not allowed in list ($ports)"
|
||||
fi
|
||||
;;
|
||||
*)
|
||||
if [ -n "$MULTIPORT" ]; then
|
||||
[ $listcount -le 15 ] || fatal_error "More than 15 entries in port list ($ports)"
|
||||
ports="-m multiport --dports $ports"
|
||||
else
|
||||
fatal_error "Port Ranges require multiport match support in your kernel ($ports)"
|
||||
fi
|
||||
;;
|
||||
esac
|
||||
else
|
||||
ports="--dport $ports"
|
||||
fi
|
||||
fi
|
||||
;;
|
||||
*)
|
||||
[ -n "$ports" ] && fatal_error "Ports only allowed with UDP or TCP ($ports)"
|
||||
;;
|
||||
esac
|
||||
|
||||
proto="-p $proto"
|
||||
else
|
||||
displayproto="(all)"
|
||||
[ -n "$ports" ] && fatal_error "Ports only allowed with UDP or TCP ($ports)"
|
||||
fi
|
||||
|
||||
destination=${destnets:=0.0.0.0/0}
|
||||
|
||||
[ -z "$pre_nat" ] && chain=$(masq_chain $interface) || chain=$(snat_chain $interface)
|
||||
|
||||
ensurenatchain $chain
|
||||
|
||||
case $destnets in
|
||||
!*)
|
||||
destnets=${destnets#!}
|
||||
|
||||
build_exclusion_chain newchain nat "$nomasq" "$destnets"
|
||||
|
||||
if [ -n "$networks" ]; then
|
||||
for s in $networks; do
|
||||
addnatrule $chain $(source_ip_range $s) $proto $ports $policy -j $newchain
|
||||
done
|
||||
networks=
|
||||
elif [ -n "$detectinterface" ]; then
|
||||
indent >&3 << __EOF__
|
||||
|
||||
networks="\$(get_routed_networks $detectinterface)"
|
||||
|
||||
[ -z "\$networks" ] && fatal_error "Unable to determine the routes through interface \"$detectinterface\""
|
||||
|
||||
for network in \$networks; do
|
||||
run_iptables -t nat -A $chain -s \$network $proto $ports $policy -j $newchain
|
||||
done
|
||||
|
||||
__EOF__
|
||||
else
|
||||
addnatrule $chain -j $newchain
|
||||
fi
|
||||
|
||||
chain=$newchain
|
||||
destnets=0.0.0.0/0
|
||||
proto=
|
||||
ports=
|
||||
policy=
|
||||
|
||||
[ -n "$nomasq" ] && source="$source except $nomasq"
|
||||
;;
|
||||
*)
|
||||
if [ -n "$nomasq" ]; then
|
||||
build_exclusion_chain newchain nat $nomasq
|
||||
|
||||
if [ -n "$networks" ]; then
|
||||
for s in $networks; do
|
||||
for destnet in $(separate_list $destnets); do
|
||||
addnatrule $chain $(both_ip_ranges $s $destnet) $proto $ports $policy -j $newchain
|
||||
done
|
||||
done
|
||||
elif [ -n "$detectinterface" ]; then
|
||||
indent >&3 << __EOF__
|
||||
|
||||
networks="\$(get_routed_networks $detectinterface)"
|
||||
|
||||
[ -z "\$networks" ] && fatal_error "Unable to determine the routes through interface \"$detectinterface\""
|
||||
|
||||
for network in \$networks; do
|
||||
__EOF__
|
||||
for destnet in $(separate_list $destnets); do
|
||||
indent >&3 << __EOF__
|
||||
run_iptables -t nat -A $chain -s \$network $(dest_ip_range $destnet) $proto $sports $policy -j $netchain
|
||||
__EOF__
|
||||
done
|
||||
indent >&3 << __EOF__
|
||||
|
||||
done
|
||||
__EOF__
|
||||
else
|
||||
for destnet in $(separate_list $destnets); do
|
||||
addnatrule $chain $(dest_ip_range $destnet) $proto $ports $policy -j $newchain
|
||||
done
|
||||
fi
|
||||
|
||||
chain=$newchain
|
||||
networks=
|
||||
destnets=0.0.0.0/0
|
||||
proto=
|
||||
ports=
|
||||
policy=
|
||||
source="$source except $nomasq"
|
||||
fi
|
||||
|
||||
;;
|
||||
esac
|
||||
|
||||
addrlist=
|
||||
target=MASQUERADE
|
||||
|
||||
[ "x$addresses" = x- ] && addresses=
|
||||
|
||||
if [ -n "$addresses" ]; then
|
||||
case "$addresses" in
|
||||
SAME:nodst:*)
|
||||
target="SAME --nodst"
|
||||
addresses=${addresses#SAME:nodst:}
|
||||
if [ "$addresses" = detect ]; then
|
||||
addrlist='$addrlist'
|
||||
else
|
||||
for address in $(separate_list $addresses); do
|
||||
addrlist="$addrlist --to $address";
|
||||
done
|
||||
fi
|
||||
;;
|
||||
SAME:*)
|
||||
target="SAME"
|
||||
addresses=${addresses#SAME:}
|
||||
if [ "$addresses" = detect ]; then
|
||||
addrlist='$addrlist'
|
||||
else
|
||||
for address in $(separate_list $addresses); do
|
||||
addrlist="$addrlist --to $address";
|
||||
done
|
||||
fi
|
||||
;;
|
||||
detect)
|
||||
target=SNAT
|
||||
addrlist='$addrlist'
|
||||
;;
|
||||
*)
|
||||
for address in $(separate_list $addresses); do
|
||||
case $address in
|
||||
*.*.*.*)
|
||||
target=SNAT
|
||||
addrlist="$addrlist --to-source $address"
|
||||
;;
|
||||
*)
|
||||
addrlist="$addrlist --to-ports ${address#:}"
|
||||
;;
|
||||
esac
|
||||
done
|
||||
;;
|
||||
esac
|
||||
|
||||
if [ "$addrlist" = '$addrlist' ]; then
|
||||
addresses='$(combine_list $addresses)'
|
||||
indent >&3 << __EOF__
|
||||
|
||||
addrlist=
|
||||
addressses=\$(find_interface_addresses $interface)
|
||||
|
||||
if [ -n "\$addresses" ]; then
|
||||
for address in \$addresses; do
|
||||
addrlist="$addrlist --to-source $address"
|
||||
done
|
||||
else
|
||||
fatal_error "Unable to determine the IP address(es) of $interface"
|
||||
fi
|
||||
|
||||
__EOF__
|
||||
elif [ -n "$add_snat_aliases" ]; then
|
||||
for address in $(separate_list $addresses); do
|
||||
address=${address%:)}
|
||||
if [ -n "$address" ]; then
|
||||
for addr in $(ip_range_explicit ${address%:*}) ; do
|
||||
if ! list_search $addr $ALIASES_TO_ADD; then
|
||||
[ -n "$RETAIN_ALIASES" ] || save_command del_ip_addr $addr $interface
|
||||
ALIASES_TO_ADD="$ALIASES_TO_ADD $addr $fullinterface"
|
||||
case $fullinterface in
|
||||
*:*)
|
||||
fullinterface=${fullinterface%:*}:$((${fullinterface#*:} + 1 ))
|
||||
;;
|
||||
esac
|
||||
fi
|
||||
done
|
||||
fi
|
||||
done
|
||||
fi
|
||||
fi
|
||||
|
||||
if [ -n "$networks" ]; then
|
||||
for network in $networks; do
|
||||
for destnet in $(separate_list $destnets); do
|
||||
addnatrule $chain $(both_ip_ranges $network $destnet) $proto $ports $policy -j $target $addrlist
|
||||
done
|
||||
|
||||
if [ -n "$addresses" ]; then
|
||||
progress_message_and_save " To $destination $displayproto from $network through ${interface} using $addresses"
|
||||
else
|
||||
progress_message_and_save " To $destination $displayproto from $network through ${interface}"
|
||||
fi
|
||||
done
|
||||
elif [ -n "$detectinterface" ]; then
|
||||
indent >&3 << __EOF__
|
||||
|
||||
networks="\$(get_routed_networks $detectinterface)"
|
||||
|
||||
[ -z "\$networks" ] && fatal_error "Unable to determine the routes through interface \"$detectinterface\""
|
||||
|
||||
for network in \$networks; do
|
||||
__EOF__
|
||||
for destnet in $(separate_list $destnets); do
|
||||
indent >&3 << __EOF__
|
||||
run_iptables -t nat -A $chain -s \$network $(dest_ip_range $destnet) $proto $ports $policy -j $target $addrlist
|
||||
__EOF__
|
||||
done
|
||||
|
||||
if [ -n "$addresses" ]; then
|
||||
message=" To $destination $displayproto from \$network through ${interface} using $addresses"
|
||||
else
|
||||
message=" To $destination $displayproto from \$network through ${interface}"
|
||||
fi
|
||||
|
||||
indent >&3 << __EOF__
|
||||
progress_message "$message"
|
||||
done
|
||||
|
||||
__EOF__
|
||||
|
||||
else
|
||||
for destnet in $(separate_list $destnets); do
|
||||
addnatrule $chain $(dest_ip_range $destnet) $proto $ports $policy -j $target $addrlist
|
||||
done
|
||||
|
||||
if [ -n "$addresses" ]; then
|
||||
progress_message_and_save " To $destination $displayproto from $source through ${interface} using $addresses"
|
||||
else
|
||||
progress_message_and_save " To $destination $displayproto from $source through ${interface}"
|
||||
fi
|
||||
fi
|
||||
|
||||
}
|
||||
|
||||
strip_file masq $1
|
||||
|
||||
if [ -n "$NAT_ENABLED" ]; then
|
||||
progress_message2 "$DOING Masquerading/SNAT"
|
||||
save_progress_message "Setting up Masquerading/SNAT..."
|
||||
fi
|
||||
|
||||
while read fullinterface networks addresses proto ports ipsec; do
|
||||
expandv fullinterface networks addresses proto ports ipsec
|
||||
if [ -n "$NAT_ENABLED" ]; then
|
||||
setup_one
|
||||
else
|
||||
error_message "WARNING: NAT disabled; masq rule ignored"
|
||||
fi
|
||||
done < $TMP_DIR/masq
|
||||
}
|
||||
|
||||
#
|
||||
# Add a record to the blacklst chain
|
||||
#
|
||||
@ -5220,8 +4444,6 @@ initialize_netfilter () {
|
||||
strip_file rules
|
||||
strip_file proxyarp
|
||||
strip_file maclist
|
||||
strip_file nat
|
||||
strip_file netmap
|
||||
|
||||
progress_message2 "Pre-processing Actions..."
|
||||
process_actions1
|
||||
@ -6841,8 +6063,18 @@ __EOF__
|
||||
[ -n "$ROUTEMARK_INTERFACES" ] && setup_routes
|
||||
fi
|
||||
|
||||
progress_message2 "$DOING NAT..."; setup_nat
|
||||
progress_message2 "$DOING NETMAP..."; setup_netmap
|
||||
if strip_file_and_lib_load nat nat; then
|
||||
progress_message2 "$DOING NAT..."
|
||||
setup_nat
|
||||
else
|
||||
> $STATEDIR/nat
|
||||
fi
|
||||
|
||||
if strip_file_and_lib_load netmap nat; then
|
||||
progress_message2 "$DOING NETMAP..."
|
||||
setup_netmap
|
||||
fi
|
||||
|
||||
progress_message2 "$DOING Common Rules"; add_common_rules
|
||||
|
||||
save_progress_message "Setting up SYN Flood Protection..."
|
||||
@ -6864,8 +6096,8 @@ __EOF__
|
||||
save_progress_message "Setting up Rules..."
|
||||
process_rules
|
||||
|
||||
if strip_file_and_lib_load tunnels tunnels; then
|
||||
tunnels=$(find_file tunnels)
|
||||
if [ -f $tunnels ]; then
|
||||
progress_message2 "$DOING $tunnels..."
|
||||
save_progress_message "Setting up Tunnels..."
|
||||
setup_tunnels $tunnels
|
||||
@ -6880,8 +6112,8 @@ __EOF__
|
||||
|
||||
progress_message2 "$DOING $(find_file policy)..."; apply_policy_rules
|
||||
|
||||
if strip_file_and_lib_load masq nat; then
|
||||
masq=$(find_file masq)
|
||||
if [ -f $masq ]; then
|
||||
setup_masq $masq
|
||||
fi
|
||||
|
||||
|
||||
540
Shorewall/lib.nat
Normal file
540
Shorewall/lib.nat
Normal file
@ -0,0 +1,540 @@
|
||||
#!/bin/sh
|
||||
#
|
||||
# Shorewall 3.2 -- /usr/share/shorewall/lib.nat
|
||||
#
|
||||
# This program is under GPL [http://www.gnu.org/copyleft/gpl.htm]
|
||||
#
|
||||
# (c) 1999,2000,2001,2002,2003,2004,2005,2006 - Tom Eastep (teastep@shorewall.net)
|
||||
#
|
||||
# Complete documentation is available at http://shorewall.net
|
||||
#
|
||||
# This program is free software; you can redistribute it and/or modify
|
||||
# it under the terms of Version 2 of the GNU General Public License
|
||||
# as published by the Free Software Foundation.
|
||||
#
|
||||
# This program is distributed in the hope that it will be useful,
|
||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
# GNU General Public License for more details.
|
||||
#
|
||||
# You should have received a copy of the GNU General Public License
|
||||
# along with this program; if not, write to the Free Software
|
||||
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA
|
||||
|
||||
#
|
||||
# Set up Source NAT (including masquerading)
|
||||
#
|
||||
setup_masq()
|
||||
{
|
||||
do_ipsec_options() {
|
||||
local options="$(separate_list $ipsec)" option
|
||||
policy="-m policy --pol ipsec --dir out"
|
||||
|
||||
for option in $options; do
|
||||
case $option in
|
||||
[Yy]es) ;;
|
||||
strict) policy="$policy --strict" ;;
|
||||
next) policy="$policy --next" ;;
|
||||
reqid=*) policy="$policy --reqid ${option#*=}" ;;
|
||||
spi=*) policy="$policy --spi ${option#*=}" ;;
|
||||
proto=*) policy="$policy --proto ${option#*=}" ;;
|
||||
mode=*) policy="$policy --mode ${option#*=}" ;;
|
||||
tunnel-src=*) policy="$policy --tunnel-src ${option#*=}" ;;
|
||||
tunnel-dst=*) policy="$policy --tunnel-dst ${option#*=}" ;;
|
||||
reqid!=*) policy="$policy ! --reqid ${option#*=}" ;;
|
||||
spi!=*) policy="$policy ! --spi ${option#*=}" ;;
|
||||
proto!=*) policy="$policy ! --proto ${option#*=}" ;;
|
||||
mode!=*) policy="$policy ! --mode ${option#*=}" ;;
|
||||
tunnel-src!=*) policy="$policy ! --tunnel-src ${option#*=}" ;;
|
||||
tunnel-dst!=*) policy="$policy ! --tunnel-dst ${option#*=}" ;;
|
||||
*) fatal_error "Invalid IPSEC option \"$option\"" ;;
|
||||
esac
|
||||
done
|
||||
}
|
||||
|
||||
setup_one() {
|
||||
local add_snat_aliases=$ADD_SNAT_ALIASES pre_nat= policy= destnets=
|
||||
|
||||
[ "x$ipsec" = x- ] && ipsec=
|
||||
|
||||
case $ipsec in
|
||||
Yes|yes)
|
||||
[ -n "$POLICY_MATCH" ] || \
|
||||
fatal_error "IPSEC=Yes requires policy match support in your kernel and iptables"
|
||||
policy="-m policy --pol ipsec --dir out"
|
||||
;;
|
||||
No|no)
|
||||
[ -n "$POLICY_MATCH" ] || \
|
||||
fatal_error "IPSEC=No requires policy match support in your kernel and iptables"
|
||||
policy="-m policy --pol none --dir out"
|
||||
;;
|
||||
*)
|
||||
if [ -n "$ipsec" ]; then
|
||||
do_ipsec_options
|
||||
elif [ -n "$POLICY_MATCH" ]; then
|
||||
policy="-m policy --pol none --dir out"
|
||||
fi
|
||||
;;
|
||||
esac
|
||||
|
||||
case $fullinterface in
|
||||
+*)
|
||||
pre_nat=Yes
|
||||
fullinterface=${fullinterface#+}
|
||||
;;
|
||||
esac
|
||||
|
||||
case $fullinterface in
|
||||
*::*)
|
||||
add_snat_aliases=
|
||||
destnets="${fullinterface##*:}"
|
||||
fullinterface="${fullinterface%:*}"
|
||||
;;
|
||||
*:*:*)
|
||||
# Both alias name and networks
|
||||
destnets="${fullinterface##*:}"
|
||||
fullinterface="${fullinterface%:*}"
|
||||
;;
|
||||
*:)
|
||||
add_snat_aliases=
|
||||
fullinterface=${fullinterface%:}
|
||||
;;
|
||||
*:*)
|
||||
# Alias name OR networks
|
||||
case ${fullinterface#*:} in
|
||||
*.*)
|
||||
# It's a networks
|
||||
destnets="${fullinterface#*:}"
|
||||
fullinterface="${fullinterface%:*}"
|
||||
;;
|
||||
*)
|
||||
#it's an alias name
|
||||
;;
|
||||
esac
|
||||
;;
|
||||
*)
|
||||
;;
|
||||
esac
|
||||
|
||||
interface=${fullinterface%:*}
|
||||
|
||||
if ! list_search $interface $ALL_INTERFACES; then
|
||||
fatal_error "Unknown interface $interface"
|
||||
fi
|
||||
|
||||
if [ "$networks" = "${networks%!*}" ]; then
|
||||
nomasq=
|
||||
else
|
||||
nomasq="${networks#*!}"
|
||||
networks="${networks%!*}"
|
||||
fi
|
||||
|
||||
source="${networks:=0.0.0.0/0}"
|
||||
|
||||
detectinterface=
|
||||
|
||||
case $source in
|
||||
*.*.*|+*|!+*)
|
||||
;;
|
||||
*)
|
||||
detectinterface=$networks
|
||||
networks=
|
||||
;;
|
||||
esac
|
||||
|
||||
[ "x$proto" = x- ] && proto=
|
||||
[ "x$ports" = x- ] && ports=
|
||||
|
||||
if [ -n "$proto" ]; then
|
||||
|
||||
displayproto="($proto)"
|
||||
|
||||
case $proto in
|
||||
tcp|TCP|udp|UDP|6|17)
|
||||
if [ -n "$ports" ]; then
|
||||
displayproto="($proto $ports)"
|
||||
|
||||
listcount=$(list_count $ports)
|
||||
|
||||
if [ $listcount -gt 1 ]; then
|
||||
case $ports in
|
||||
*:*)
|
||||
if [ -n "$XMULTIPORT" ]; then
|
||||
if [ $(($listcount + $(list_count1 $(split $ports) ) )) -le 16 ]; then
|
||||
ports="-m multiport --dports $ports"
|
||||
else
|
||||
fatal_error "More than 15 entries in port list ($ports)"
|
||||
fi
|
||||
else
|
||||
fatal_error "Port Range not allowed in list ($ports)"
|
||||
fi
|
||||
;;
|
||||
*)
|
||||
if [ -n "$MULTIPORT" ]; then
|
||||
[ $listcount -le 15 ] || fatal_error "More than 15 entries in port list ($ports)"
|
||||
ports="-m multiport --dports $ports"
|
||||
else
|
||||
fatal_error "Port Ranges require multiport match support in your kernel ($ports)"
|
||||
fi
|
||||
;;
|
||||
esac
|
||||
else
|
||||
ports="--dport $ports"
|
||||
fi
|
||||
fi
|
||||
;;
|
||||
*)
|
||||
[ -n "$ports" ] && fatal_error "Ports only allowed with UDP or TCP ($ports)"
|
||||
;;
|
||||
esac
|
||||
|
||||
proto="-p $proto"
|
||||
else
|
||||
displayproto="(all)"
|
||||
[ -n "$ports" ] && fatal_error "Ports only allowed with UDP or TCP ($ports)"
|
||||
fi
|
||||
|
||||
destination=${destnets:=0.0.0.0/0}
|
||||
|
||||
[ -z "$pre_nat" ] && chain=$(masq_chain $interface) || chain=$(snat_chain $interface)
|
||||
|
||||
ensurenatchain $chain
|
||||
|
||||
case $destnets in
|
||||
!*)
|
||||
destnets=${destnets#!}
|
||||
|
||||
build_exclusion_chain newchain nat "$nomasq" "$destnets"
|
||||
|
||||
if [ -n "$networks" ]; then
|
||||
for s in $networks; do
|
||||
addnatrule $chain $(source_ip_range $s) $proto $ports $policy -j $newchain
|
||||
done
|
||||
networks=
|
||||
elif [ -n "$detectinterface" ]; then
|
||||
indent >&3 << __EOF__
|
||||
|
||||
networks="\$(get_routed_networks $detectinterface)"
|
||||
|
||||
[ -z "\$networks" ] && fatal_error "Unable to determine the routes through interface \"$detectinterface\""
|
||||
|
||||
for network in \$networks; do
|
||||
run_iptables -t nat -A $chain -s \$network $proto $ports $policy -j $newchain
|
||||
done
|
||||
|
||||
__EOF__
|
||||
else
|
||||
addnatrule $chain -j $newchain
|
||||
fi
|
||||
|
||||
chain=$newchain
|
||||
destnets=0.0.0.0/0
|
||||
proto=
|
||||
ports=
|
||||
policy=
|
||||
|
||||
[ -n "$nomasq" ] && source="$source except $nomasq"
|
||||
;;
|
||||
*)
|
||||
if [ -n "$nomasq" ]; then
|
||||
build_exclusion_chain newchain nat $nomasq
|
||||
|
||||
if [ -n "$networks" ]; then
|
||||
for s in $networks; do
|
||||
for destnet in $(separate_list $destnets); do
|
||||
addnatrule $chain $(both_ip_ranges $s $destnet) $proto $ports $policy -j $newchain
|
||||
done
|
||||
done
|
||||
elif [ -n "$detectinterface" ]; then
|
||||
indent >&3 << __EOF__
|
||||
|
||||
networks="\$(get_routed_networks $detectinterface)"
|
||||
|
||||
[ -z "\$networks" ] && fatal_error "Unable to determine the routes through interface \"$detectinterface\""
|
||||
|
||||
for network in \$networks; do
|
||||
__EOF__
|
||||
for destnet in $(separate_list $destnets); do
|
||||
indent >&3 << __EOF__
|
||||
run_iptables -t nat -A $chain -s \$network $(dest_ip_range $destnet) $proto $sports $policy -j $netchain
|
||||
__EOF__
|
||||
done
|
||||
indent >&3 << __EOF__
|
||||
|
||||
done
|
||||
__EOF__
|
||||
else
|
||||
for destnet in $(separate_list $destnets); do
|
||||
addnatrule $chain $(dest_ip_range $destnet) $proto $ports $policy -j $newchain
|
||||
done
|
||||
fi
|
||||
|
||||
chain=$newchain
|
||||
networks=
|
||||
destnets=0.0.0.0/0
|
||||
proto=
|
||||
ports=
|
||||
policy=
|
||||
source="$source except $nomasq"
|
||||
fi
|
||||
|
||||
;;
|
||||
esac
|
||||
|
||||
addrlist=
|
||||
target=MASQUERADE
|
||||
|
||||
[ "x$addresses" = x- ] && addresses=
|
||||
|
||||
if [ -n "$addresses" ]; then
|
||||
case "$addresses" in
|
||||
SAME:nodst:*)
|
||||
target="SAME --nodst"
|
||||
addresses=${addresses#SAME:nodst:}
|
||||
if [ "$addresses" = detect ]; then
|
||||
addrlist='$addrlist'
|
||||
else
|
||||
for address in $(separate_list $addresses); do
|
||||
addrlist="$addrlist --to $address";
|
||||
done
|
||||
fi
|
||||
;;
|
||||
SAME:*)
|
||||
target="SAME"
|
||||
addresses=${addresses#SAME:}
|
||||
if [ "$addresses" = detect ]; then
|
||||
addrlist='$addrlist'
|
||||
else
|
||||
for address in $(separate_list $addresses); do
|
||||
addrlist="$addrlist --to $address";
|
||||
done
|
||||
fi
|
||||
;;
|
||||
detect)
|
||||
target=SNAT
|
||||
addrlist='$addrlist'
|
||||
;;
|
||||
*)
|
||||
for address in $(separate_list $addresses); do
|
||||
case $address in
|
||||
*.*.*.*)
|
||||
target=SNAT
|
||||
addrlist="$addrlist --to-source $address"
|
||||
;;
|
||||
*)
|
||||
addrlist="$addrlist --to-ports ${address#:}"
|
||||
;;
|
||||
esac
|
||||
done
|
||||
;;
|
||||
esac
|
||||
|
||||
if [ "$addrlist" = '$addrlist' ]; then
|
||||
addresses='$(combine_list $addresses)'
|
||||
indent >&3 << __EOF__
|
||||
|
||||
addrlist=
|
||||
addressses=\$(find_interface_addresses $interface)
|
||||
|
||||
if [ -n "\$addresses" ]; then
|
||||
for address in \$addresses; do
|
||||
addrlist="$addrlist --to-source $address"
|
||||
done
|
||||
else
|
||||
fatal_error "Unable to determine the IP address(es) of $interface"
|
||||
fi
|
||||
|
||||
__EOF__
|
||||
elif [ -n "$add_snat_aliases" ]; then
|
||||
for address in $(separate_list $addresses); do
|
||||
address=${address%:)}
|
||||
if [ -n "$address" ]; then
|
||||
for addr in $(ip_range_explicit ${address%:*}) ; do
|
||||
if ! list_search $addr $ALIASES_TO_ADD; then
|
||||
[ -n "$RETAIN_ALIASES" ] || save_command del_ip_addr $addr $interface
|
||||
ALIASES_TO_ADD="$ALIASES_TO_ADD $addr $fullinterface"
|
||||
case $fullinterface in
|
||||
*:*)
|
||||
fullinterface=${fullinterface%:*}:$((${fullinterface#*:} + 1 ))
|
||||
;;
|
||||
esac
|
||||
fi
|
||||
done
|
||||
fi
|
||||
done
|
||||
fi
|
||||
fi
|
||||
|
||||
if [ -n "$networks" ]; then
|
||||
for network in $networks; do
|
||||
for destnet in $(separate_list $destnets); do
|
||||
addnatrule $chain $(both_ip_ranges $network $destnet) $proto $ports $policy -j $target $addrlist
|
||||
done
|
||||
|
||||
if [ -n "$addresses" ]; then
|
||||
progress_message_and_save " To $destination $displayproto from $network through ${interface} using $addresses"
|
||||
else
|
||||
progress_message_and_save " To $destination $displayproto from $network through ${interface}"
|
||||
fi
|
||||
done
|
||||
elif [ -n "$detectinterface" ]; then
|
||||
indent >&3 << __EOF__
|
||||
|
||||
networks="\$(get_routed_networks $detectinterface)"
|
||||
|
||||
[ -z "\$networks" ] && fatal_error "Unable to determine the routes through interface \"$detectinterface\""
|
||||
|
||||
for network in \$networks; do
|
||||
__EOF__
|
||||
for destnet in $(separate_list $destnets); do
|
||||
indent >&3 << __EOF__
|
||||
run_iptables -t nat -A $chain -s \$network $(dest_ip_range $destnet) $proto $ports $policy -j $target $addrlist
|
||||
__EOF__
|
||||
done
|
||||
|
||||
if [ -n "$addresses" ]; then
|
||||
message=" To $destination $displayproto from \$network through ${interface} using $addresses"
|
||||
else
|
||||
message=" To $destination $displayproto from \$network through ${interface}"
|
||||
fi
|
||||
|
||||
indent >&3 << __EOF__
|
||||
progress_message "$message"
|
||||
done
|
||||
|
||||
__EOF__
|
||||
|
||||
else
|
||||
for destnet in $(separate_list $destnets); do
|
||||
addnatrule $chain $(dest_ip_range $destnet) $proto $ports $policy -j $target $addrlist
|
||||
done
|
||||
|
||||
if [ -n "$addresses" ]; then
|
||||
progress_message_and_save " To $destination $displayproto from $source through ${interface} using $addresses"
|
||||
else
|
||||
progress_message_and_save " To $destination $displayproto from $source through ${interface}"
|
||||
fi
|
||||
fi
|
||||
|
||||
}
|
||||
|
||||
if [ -n "$NAT_ENABLED" ]; then
|
||||
progress_message2 "$DOING Masquerading/SNAT"
|
||||
save_progress_message "Setting up Masquerading/SNAT..."
|
||||
fi
|
||||
|
||||
while read fullinterface networks addresses proto ports ipsec; do
|
||||
expandv fullinterface networks addresses proto ports ipsec
|
||||
if [ -n "$NAT_ENABLED" ]; then
|
||||
setup_one
|
||||
else
|
||||
error_message "WARNING: NAT disabled; masq rule ignored"
|
||||
fi
|
||||
done < $TMP_DIR/masq
|
||||
}
|
||||
|
||||
#
|
||||
# Setup Static Network Address Translation (NAT)
|
||||
#
|
||||
setup_nat() {
|
||||
local external= interface= internal= allints= localnat= policyin= policyout=
|
||||
|
||||
validate_one() #1 = Variable Name, $2 = Column name, $3 = value
|
||||
{
|
||||
case $3 in
|
||||
Yes|yes)
|
||||
;;
|
||||
No|no)
|
||||
eval ${1}=
|
||||
;;
|
||||
*)
|
||||
[ -n "$3" ] && \
|
||||
fatal_error "Invalid value ($3) for $2 in entry \"$external $interface $internal $allints $localnat\""
|
||||
;;
|
||||
esac
|
||||
}
|
||||
|
||||
do_one_nat() {
|
||||
local add_ip_aliases=$ADD_IP_ALIASES iface=${interface%:*}
|
||||
|
||||
if [ -n "$add_ip_aliases" ]; then
|
||||
case $interface in
|
||||
*:)
|
||||
interface=${interface%:}
|
||||
add_ip_aliases=
|
||||
;;
|
||||
*)
|
||||
[ -n "$RETAIN_ALIASES" ] || save_command del_ip_addr $external $iface
|
||||
;;
|
||||
esac
|
||||
else
|
||||
interface=${interface%:}
|
||||
fi
|
||||
|
||||
validate_one allints "ALL INTERFACES" $allints
|
||||
validate_one localnat "LOCAL" $localnat
|
||||
|
||||
if [ -n "$allints" ]; then
|
||||
addnatrule nat_in -d $external $policyin -j DNAT --to-destination $internal
|
||||
addnatrule nat_out -s $internal $policyout -j SNAT --to-source $external
|
||||
else
|
||||
addnatrule $(input_chain $iface) -d $external $policyin -j DNAT --to-destination $internal
|
||||
addnatrule $(output_chain $iface) -s $internal $policyout -j SNAT --to-source $external
|
||||
fi
|
||||
|
||||
[ -n "$localnat" ] && \
|
||||
run_iptables2 -t nat -A OUTPUT -d $external $policyout -j DNAT --to-destination $internal
|
||||
|
||||
if [ -n "$add_ip_aliases" ]; then
|
||||
list_search $external $ALIASES_TO_ADD || \
|
||||
ALIASES_TO_ADD="$ALIASES_TO_ADD $external $interface"
|
||||
fi
|
||||
}
|
||||
#
|
||||
# At this point, we're just interested in the network translation
|
||||
#
|
||||
> $STATEDIR/nat
|
||||
|
||||
if [ -n "$POLICY_MATCH" ]; then
|
||||
policyin="-m policy --pol none --dir in"
|
||||
policyout="-m policy --pol none --dir out"
|
||||
fi
|
||||
|
||||
[ -n "$RETAIN_ALIASES" ] || save_progress_message "Setting up one-to-one NAT..."
|
||||
|
||||
while read external interface internal allints localnat; do
|
||||
expandv external interface internal allints localnat
|
||||
|
||||
do_one_nat
|
||||
|
||||
progress_message_and_save " Host $internal NAT $external on $interface"
|
||||
done < $TMP_DIR/nat
|
||||
}
|
||||
|
||||
#
|
||||
# Setup Network Mapping (NETMAP)
|
||||
#
|
||||
setup_netmap() {
|
||||
|
||||
while read type net1 interface net2 ; do
|
||||
expandv type net1 interface net2
|
||||
|
||||
list_search $interface $ALL_INTERFACES || \
|
||||
fatal_error "Unknown interface $interface in entry \"$type $net1 $interface $net2\""
|
||||
|
||||
case $type in
|
||||
DNAT)
|
||||
addnatrule $(input_chain $interface) -d $net1 -j NETMAP --to $net2
|
||||
;;
|
||||
SNAT)
|
||||
addnatrule $(output_chain $interface) -s $net1 -j NETMAP --to $net2
|
||||
;;
|
||||
*)
|
||||
fatal_error "Invalid type $type in entry \"$type $net1 $interface $net2\""
|
||||
;;
|
||||
esac
|
||||
|
||||
progress_message_and_save " Network $net1 on $interface mapped to $net2 ($type)"
|
||||
|
||||
done < $TMP_DIR/netmap
|
||||
}
|
||||
@ -116,8 +116,10 @@ fi
|
||||
%attr(0555,root,root) /usr/share/shorewall/help
|
||||
%attr(0644,root,root) /usr/share/shorewall/Limit
|
||||
%attr(0444,root,root) /usr/share/shorewall/lib.dynamiczones
|
||||
%attr(0444,root,root) /usr/share/shorewall/lib.nat
|
||||
%attr(0444,root,root) /usr/share/shorewall/lib.tc
|
||||
%attr(0444,root,root) /usr/share/shorewall/lib.tcrules
|
||||
%attr(0444,root,root) /usr/share/shorewall/lib.tunnels
|
||||
%attr(0644,root,root) /usr/share/shorewall/macro.AllowICMPs
|
||||
%attr(0644,root,root) /usr/share/shorewall/macro.Amanda
|
||||
%attr(0644,root,root) /usr/share/shorewall/macro.Auth
|
||||
|
||||
Loading…
Reference in New Issue
Block a user