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https://gitlab.com/shorewall/code.git
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Add maclog extension script
git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@4674 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb
This commit is contained in:
teastep
parent
c133e2c246
commit
5b68b5396d
@ -12,7 +12,7 @@ Changes in 3.3.3
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6) Add macro.RDP.
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7) Implement MACLIST_LOG_BROADCASTS.
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7) Add maclog extension file.
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Changes in 3.3.1
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@ -5196,8 +5196,8 @@ __EOF__
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maclist_hosts=$(find_hosts_by_option maclist)
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if [ -n "$maclist_hosts" ]; then
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save_progress_message "Setting up MAC Filtration..."
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setup_mac_lists
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save_progress_message "Setting up MAC Filtration -- Phase 1..."
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setup_mac_lists 1
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fi
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progress_message2 "$DOING $(find_file rules)..."
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@ -5227,6 +5227,11 @@ __EOF__
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process_actions3
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fi
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if [ -n "$maclist_hosts" ]; then
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save_progress_message "Setting up MAC Filtration -- Phase 2..."
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setup_mac_lists 2
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fi
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save_progress_message "Applying Policies..."
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progress_message2 "$DOING $(find_file policy)..."; apply_policy_rules
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@ -28,7 +28,8 @@
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#
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# Set up MAC Verification
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#
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setup_mac_lists() {
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setup_mac_lists() # $1 = Phase Number
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{
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local interface
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local mac
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local addresses
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@ -85,50 +86,50 @@ setup_mac_lists() {
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fi
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done
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progress_message "$DOING MAC Verification on $maclist_interfaces..."
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progress_message "$DOING MAC Verification on $maclist_interfaces -- Phase $1..."
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#
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# Create chains.
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#
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for interface in $maclist_interfaces; do
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chain=$(mac_chain $interface)
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create_mac_chain $chain
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#
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# If we're using the mangle table and the interface is DHCP-enabled then we need to accept DHCP broadcasts from 0.0.0.0
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#
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if [ $MACLIST_TABLE = mangle ] && interface_has_option $interface dhcp; then
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run_iptables -t mangle -A $chain -s 0.0.0.0 -d 255.255.255.255 -p udp --dport 67:68 -j RETURN
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fi
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if [ $1 -eq 1 ]; then
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for interface in $maclist_interfaces; do
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chain=$(mac_chain $interface)
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create_mac_chain $chain
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#
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# If we're using the mangle table and the interface is DHCP-enabled then we need to accept DHCP broadcasts from 0.0.0.0
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#
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if [ $MACLIST_TABLE = mangle ] && interface_has_option $interface dhcp; then
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run_iptables -t mangle -A $chain -s 0.0.0.0 -d 255.255.255.255 -p udp --dport 67:68 -j RETURN
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fi
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if [ -n "$MACLIST_TTL" ]; then
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chain1=$(macrecent_target $interface)
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create_mac_chain $chain1
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run_iptables -A $chain -t $MACLIST_TABLE -m recent --rcheck --seconds $MACLIST_TTL --name $chain -j RETURN
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run_iptables -A $chain -t $MACLIST_TABLE -j $chain1
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run_iptables -A $chain -t $MACLIST_TABLE -m recent --update --name $chain -j RETURN
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run_iptables -A $chain -t $MACLIST_TABLE -m recent --set --name $chain
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fi
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done
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#
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# Process the maclist file producing the verification rules
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#
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while read disposition interface mac addresses; do
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expandv disposition interface mac addresses
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if [ -n "$MACLIST_TTL" ]; then
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chain1=$(macrecent_target $interface)
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create_mac_chain $chain1
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run_iptables -A $chain -t $MACLIST_TABLE -m recent --rcheck --seconds $MACLIST_TTL --name $chain -j RETURN
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run_iptables -A $chain -t $MACLIST_TABLE -j $chain1
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run_iptables -A $chain -t $MACLIST_TABLE -m recent --update --name $chain -j RETURN
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run_iptables -A $chain -t $MACLIST_TABLE -m recent --set --name $chain
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fi
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done
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#
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# Process the maclist file producing the verification rules
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#
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while read disposition interface mac addresses; do
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expandv disposition interface mac addresses
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level=
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case $disposition in
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ACCEPT:*)
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level=${disposition#*:}
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disposition=ACCEPT
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target=RETURN
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;;
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ACCEPT)
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target=RETURN
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;;
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REJECT:*)
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[ $MACLIST_TABLE = mangle ] && fatal_error "DISPOSITION = REJECT is incompatible with MACLIST_TABLE=mangle"
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target=reject
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level=
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case $disposition in
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ACCEPT:*)
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level=${disposition#*:}
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disposition=ACCEPT
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target=RETURN
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;;
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ACCEPT)
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target=RETURN
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;;
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REJECT:*)
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[ $MACLIST_TABLE = mangle ] && fatal_error "DISPOSITION = REJECT is incompatible with MACLIST_TABLE=mangle"
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target=reject
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disposition=REJECT
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;;
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REJECT)
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@ -150,57 +151,81 @@ setup_mac_lists() {
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disposition=ACCEPT
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target=RETURN
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;;
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esac
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esac
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physdev_part=
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physdev_part=
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if [ -n "$BRIDGING" ]; then
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case $interface in
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*:*)
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physdev_part="-m physdev --physdev-in ${interface#*:}"
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interface=${interface%:*}
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if [ -n "$BRIDGING" ]; then
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case $interface in
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*:*)
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physdev_part="-m physdev --physdev-in ${interface#*:}"
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interface=${interface%:*}
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;;
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esac
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fi
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[ -n "$MACLIST_TTL" ] && chain=$(macrecent_target $interface) || chain=$(mac_chain $interface)
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if ! have_mac_chain $chain ; then
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fatal_error "No hosts on $interface have the maclist option specified"
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fi
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if [ x${mac:=-} = x- ]; then
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if [ -z "$addresses" ]; then
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fatal_error "You must specify a MAC address or an IP address"
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else
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macpart=
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fi
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else
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macpart=$(mac_match $mac)
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fi
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if [ -z "$addresses" ]; then
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[ -n "$level" ] && \
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log_rule_limit $level $chain $(mac_chain $interface) $disposition "$LOGLIMIT" "" -A -t $MACLIST_TABLE $macpart $physdev_part
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run_iptables -A $chain -t $MACLIST_TABLE $macpart $physdev_part -j $target
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else
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for address in $(separate_list $addresses) ; do
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[ -n "$level" ] && \
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log_rule_limit $level $chain $(mac_chain $interface) $disposition "$LOGLIMIT" "" -A -t $MACLIST_TABLE $macpart -s $address $physdev_part
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run_iptables2 -A $chain -t $MACLIST_TABLE $macpart -s $address $physdev_part -j $target
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done
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fi
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done < $TMP_DIR/maclist
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#
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# Generate jumps from the input and forward chains
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#
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[ -n "$POLICY_MATCH" ] && policy="-m policy --pol $ipsec --dir in" || policy=
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for hosts in $maclist_hosts; do
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ipsec=${hosts%^*}
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hosts=${hosts#*^}
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interface=${hosts%%:*}
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hosts=${hosts#*:}
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case $MACLIST_TABLE in
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filter)
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for chain in $(first_chains $interface) ; do
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run_iptables -A $chain $(match_source_hosts $hosts) -m state --state NEW \
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$policy -j $(mac_chain $interface)
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done
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;;
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*)
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run_iptables -t mangle -A PREROUTING -i $interface $(match_source_hosts $hosts) -m state --state NEW \
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$policy -j $(mac_chain $interface)
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;;
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esac
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fi
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done
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else
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#
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# Must take care of our own broadcasts and multicasts then terminate the verification
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# chains
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#
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for interface in $maclist_interfaces; do
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[ -n "$MACLIST_TTL" ] && chain=$(macrecent_target $interface) || chain=$(mac_chain $interface)
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if ! have_mac_chain $chain ; then
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fatal_error "No hosts on $interface have the maclist option specified"
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fi
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if [ x${mac:=-} = x- ]; then
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if [ -z "$addresses" ]; then
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fatal_error "You must specify a MAC address or an IP address"
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else
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macpart=
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fi
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else
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macpart=$(mac_match $mac)
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fi
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if [ -z "$addresses" ]; then
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[ -n "$level" ] && \
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log_rule_limit $level $chain $(mac_chain $interface) $disposition "$LOGLIMIT" "" -A -t $MACLIST_TABLE $macpart $physdev_part
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run_iptables -A $chain -t $MACLIST_TABLE $macpart $physdev_part -j $target
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else
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for address in $(separate_list $addresses) ; do
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[ -n "$level" ] && \
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log_rule_limit $level $chain $(mac_chain $interface) $disposition "$LOGLIMIT" "" -A -t $MACLIST_TABLE $macpart -s $address $physdev_part
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run_iptables2 -A $chain -t $MACLIST_TABLE $macpart -s $address $physdev_part -j $target
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done
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fi
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done < $TMP_DIR/maclist
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#
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# Must take care of our own broadcasts and multicasts then terminate the verification
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# chains
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#
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for interface in $maclist_interfaces; do
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[ -n "$MACLIST_TTL" ] && chain=$(macrecent_target $interface) || chain=$(mac_chain $interface)
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if [ -n "$MACLIST_LOG_LEVEL" -o $MACLIST_DISPOSITION != ACCEPT ]; then
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indent >&3 << __EOF__
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[ -n "$MACLIST_TTL" ] && chain=$(macrecent_target $interface) || chain=$(mac_chain $interface)
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if [ -n "$MACLIST_LOG_LEVEL" -o $MACLIST_DISPOSITION != ACCEPT ]; then
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indent >&3 << __EOF__
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blob=\$(ip link show $interface 2> /dev/null)
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@ -218,62 +243,20 @@ ip -f inet addr show $interface 2> /dev/null | grep 'inet.*brd' | sed 's/inet //
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done
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__EOF__
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fi
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if [ -n "$MACLIST_LOG_LEVEL" ]; then
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if [ $MACLIST_DISPOSITION != ACCEPT -a -z "$MACLIST_LOG_BROADCASTS" ]; then
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#
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# Don't log broadcasts
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#
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if [ -n "$USEPKTTYPE" ]; then
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run_iptables -t $MACLIST_TABLE -A $chain -m pkttype --pkt-type broadcast -j DROP
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run_iptables -t $MACLIST_TABLE -A $chain -m pkttype --pkt-type multicast -j DROP
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else
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for interface in $(find_bcastdetect_interfaces); do
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indent >&3 << __EOF__
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ip -f inet addr show $interface 2> /dev/null | grep 'inet.*brd' | sed 's/inet.*brd //; s/scope.*//;' | sort -u | while read address; do
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run_iptables -t $MACLIST_TABLE -A $chain -d \$address -j DROP
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done
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__EOF__
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done
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for address in $(find_broadcasts) 255.255.255.255 224.0.0.0/4 ; do
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run_iptables -t $MACLIST_TABLE -A $chain -d $address -j DROP
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done
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fi
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fi
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log_rule_limit $MACLIST_LOG_LEVEL $chain $(mac_chain $interface) $MACLIST_DISPOSITION "$LOGLIMIT" "" -A -t $MACLIST_TABLE
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fi
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if [ $MACLIST_DISPOSITION != ACCEPT ]; then
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run_iptables -A $chain -t $MACLIST_TABLE -j $MACLIST_TARGET
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fi
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done
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#
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# Generate jumps from the input and forward chains
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#
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[ -n "$POLICY_MATCH" ] && policy="-m policy --pol $ipsec --dir in" || policy=
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for hosts in $maclist_hosts; do
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ipsec=${hosts%^*}
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hosts=${hosts#*^}
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interface=${hosts%%:*}
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hosts=${hosts#*:}
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case $MACLIST_TABLE in
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filter)
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for chain in $(first_chains $interface) ; do
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run_iptables -A $chain $(match_source_hosts $hosts) -m state --state NEW \
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$policy -j $(mac_chain $interface)
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done
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;;
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*)
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run_iptables -t mangle -A PREROUTING -i $interface $(match_source_hosts $hosts) -m state --state NEW \
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$policy -j $(mac_chain $interface)
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;;
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esac
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done
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CHAIN=$chain
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append_file maclog
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if [ -n "$MACLIST_LOG_LEVEL" ]; then
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log_rule_limit $MACLIST_LOG_LEVEL $chain $(mac_chain $interface) $MACLIST_DISPOSITION "$LOGLIMIT" "" -A -t $MACLIST_TABLE
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fi
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if [ $MACLIST_DISPOSITION != ACCEPT ]; then
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run_iptables -A $chain -t $MACLIST_TABLE -j $MACLIST_TARGET
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fi
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done
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fi
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}
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@ -117,13 +117,12 @@ Other changes in 3.3.3
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4) A new macro (macro.RDP) has been added for Microsoft Remote
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Desktop. This macro was contributed by Tuomo Soini.
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5) A new MACLIST_LOG_BROADCASTS option has been added to
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shorewall.conf. When set to 'No', suppresses logging of broadcast
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and multicast traffic as a result of MACLIST_LOG_LEVEL having been
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set to a non-empty value.
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The default is MACLIST_LOG_BROADCASTS=Yes which is compatible with
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the traditional behavior of MACLIST_LOG_LEVEL.
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5) A new 'maclog' extension file has been added. This file is
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processed just before logging based on the setting of
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MACLIST_LOG_LEVEL is done. When invoked, the CHAIN variable will
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contain the name of the chain where rules should be inserted.
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Remember that if you have specified MACLIST_TABLE=mangle, then your
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run_iptables commands should include "-t mangle".
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Migration Considerations:
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@ -1111,6 +1111,8 @@ dump_command() {
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esac
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done
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[ $VERBOSE -lt 2 ] && VERBOSE=2
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[ -n "$debugging" ] && set -x
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[ $# -eq 0 ] || usage 1
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clear_term
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@ -227,20 +227,25 @@ BLACKLIST_LOGLEVEL=
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# Specifies the logging level for connection requests that fail MAC
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# verification. If set to the empty value (MACLIST_LOG_LEVEL="") then
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# such connection requests will not be logged.
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#
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# If MACLIST_LOG_LEVEL is non-empty, then MACLIST_LOG_BROADCASTS determines
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# whether broadcast/multicast traffic is dropped or rejected silently.
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#
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# MACLIST_LOG_BROADCASTS=No -- Don't log broadcast/multicast
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# MACLIST_LOG_BROADCASTS=Yes -- Log broadcast/multicast (Default)
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#
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# See the comment at the top of this section for a description of log levels
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#
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# If you wish to filter messages logged under this option, then supply
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# the /etc/shorewall/maclog extension script (you will have to create the
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# file yourself). That script will be copied into the compiled firewall
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# script at a point just before logging occurs. The shell variable CHAIN
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# will be set to the name of the chain where the logging rule will be
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# inserted.
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#
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# If you set MACLIST_TABLE=mangle later in this file, be sure that your
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# 'run_iptables' commands include '-t mangle'.
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#
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# See http://www.shorewall.net/shorewall_extension_scripts.htm for more
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# information about extension scripts.
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#
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MACLIST_LOG_LEVEL=info
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MACLIST_LOG_BROADCASTS=Yes
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#
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# TCP FLAGS Log Level
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#
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