forked from extern/shorewall_code
Add MACLIST_TTL
git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@2013 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb
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teastep
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@ -4,6 +4,8 @@ Changes in 2.2.3
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2) Obey 'routestopped' rules during [re]start.
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3) MACLIST_TTL added.
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Changes in 2.2.2
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1) The 'check' command disclaimer is toned down further and only
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@ -464,6 +464,11 @@ mac_chain() # $1 = interface
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echo $(chain_base $1)_mac
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}
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macrecent_target() # $1 - interface
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{
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[ -n "$MACLIST_TTL" ] && echo $(chain_base $1)_rec || echo RETURN
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}
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#
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# Functions for creating dynamic zone rules
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#
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@ -2000,6 +2005,7 @@ setup_mac_lists() {
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local addresses
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local address
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local chain
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local chain1
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local macpart
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local blob
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local hosts
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@ -2024,10 +2030,19 @@ setup_mac_lists() {
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progress_message "Setting up MAC Verification on $maclist_interfaces..."
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#
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# Be sure that they are all ethernet interfaces
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# Create chains.
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#
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for interface in $maclist_interfaces; do
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createchain $(mac_chain $interface) no
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chain=$(mac_chain $interface)
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createchain $chain no
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if [ -n "$MACLIST_TTL" ]; then
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chain1=$(macrecent_target $interface)
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createchain $chain1 no
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run_iptables -A $chain -m recent --rcheck --seconds $MACLIST_TTL --name $chain -j $chain1
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run_iptables -A $chain1 -m recent --update --name $chain -j ACCEPT
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run_iptables -A $chain1 -m recent --set --name $chain -j ACCEPT
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fi
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done
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#
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# Process the maclist file producing the verification rules
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@ -2047,6 +2062,7 @@ setup_mac_lists() {
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fi
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chain=$(mac_chain $interface)
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chain1=$(macrecent_target $interface)
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if ! havechain $chain ; then
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fatal_error "No hosts on $interface have the maclist option specified"
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@ -2055,10 +2071,10 @@ setup_mac_lists() {
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macpart=$(mac_match $mac)
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if [ -z "$addresses" ]; then
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run_iptables -A $chain $macpart $physdev_part -j RETURN
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run_iptables -A $chain $macpart $physdev_part -j $chain1
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else
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for address in $(separate_list $addresses) ; do
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run_iptables2 -A $chain $macpart -s $address $physdev_part -j RETURN
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run_iptables2 -A $chain $macpart -s $address $physdev_part -j $chain1
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done
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fi
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done < $TMP_DIR/maclist
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@ -2068,6 +2084,7 @@ setup_mac_lists() {
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#
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for interface in $maclist_interfaces; do
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chain=$(mac_chain $interface)
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chain1=$(macrecent_target $interface)
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blob=$(ip link show $interface 2> /dev/null)
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@ -2076,11 +2093,11 @@ setup_mac_lists() {
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ip -f inet addr show $interface 2> /dev/null | grep 'inet.*brd' | sed 's/inet //; s/brd //; s/scope.*//;' | while read address broadcast; do
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if [ -n "$broadcast" ]; then
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run_iptables -A $chain -s ${address%/*} -d $broadcast -j RETURN
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run_iptables -A $chain -s ${address%/*} -d $broadcast -j $chain1
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fi
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run_iptables -A $chain -s $address -d 255.255.255.255 -j RETURN
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run_iptables -A $chain -s $address -d 224.0.0.0/4 -j RETURN
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run_iptables -A $chain -s $address -d 255.255.255.255 -j $chain1
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run_iptables -A $chain -s $address -d 224.0.0.0/4 -j $chain1
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done
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if [ -n "$MACLIST_LOG_LEVEL" ]; then
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@ -5600,6 +5617,7 @@ determine_capabilities() {
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POLICY_MATCH=
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PHYSDEV_MATCH=
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IPRANGE_MATCH=
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RECENT_MATCH=
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qt $IPTABLES -N fooX1234
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qt $IPTABLES -A fooX1234 -m conntrack --ctorigdst 192.168.1.1 -j ACCEPT && CONNTRACK_MATCH=Yes
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@ -5608,7 +5626,7 @@ determine_capabilities() {
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qt $IPTABLES -A fooX1234 -m policy --pol ipsec --dir in -j ACCEPT && POLICY_MATCH=Yes
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qt $IPTABLES -A fooX1234 -m physdev --physdev-in eth0 -j ACCEPT && PHYSDEV_MATCH=Yes
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qt $IPTABLES -A fooX1234 -m iprange --src-range 192.168.1.5-192.168.1.124 -j ACCEPT && IPRANGE_MATCH=Yes
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qt $IPTABLES -A fooX1234 -m recent --update -j ACCEPT && RECENT_MATCH=Yes
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if [ -n "$PKTTYPE" ]; then
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qt $IPTABLES -A fooX1234 -m pkttype --pkt-type broadcast -j ACCEPT || PKTTYPE=
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@ -5638,6 +5656,7 @@ report_capabilities() {
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report_capability "Policy Match" $POLICY_MATCH
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report_capability "Physdev Match" $PHYSDEV_MATCH
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report_capability "IP range Match" $IPRANGE_MATCH
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report_capability "Recent Match" $RECENT_MATCH
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}
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#
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@ -7263,6 +7282,7 @@ do_initialize() {
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LOGALLNEW=
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DROPINVALID=
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RFC1918_STRICT=
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MACLIST_TTL=
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RESTOREBASE=
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TMP_DIR=
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@ -7459,6 +7479,12 @@ do_initialize() {
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LOGTAGONLY=$(added_param_value_no LOGTAGONLY $LOGTAGONLY)
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DROPINVALID=$(added_param_value_yes DROPINVALID $DROPINVALID)
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RFC1918_STRICT=$(added_param_value_no RFC1918_STRICT $RFC1918_STRICT)
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[ "$MACLIST_TTL" = "0" ] && MACLIST_TTL=
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if [ -n "$MACLIST_TTL" -a -z "$RECENT_MATCH" ]; then
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startup_error "MACLIST_TTL requires the Recent Match capability which is not present in your Kernel and/or iptables"
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fi
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#
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# Strip the files that we use often
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#
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@ -768,6 +768,29 @@ DROPINVALID=No
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RFC1918_STRICT=No
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#
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# MACLIST caching
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#
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# If your iptables and kernel support the "Recent Match" (see the output of
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# "shorewall check" near the top), you can cache the results of a 'maclist'
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# file lookup and thus reduce the overhead associated with MAC Verification
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# (/etc/shorewall/maclist).
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#
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# When a new connection arrives from a 'maclist' interface, the packet passes
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# through then list of entries for that interface in /etc/shorewall/maclist. If
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# there is a match then the source IP address is added to the 'Recent' set for
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# that interface. Subsequent connection attempts from that IP address occuring
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# within $MACLIST_TTL seconds will be accepted without having to scan all of
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# the entries. After $MACLIST_TTL from the first accepted connection request,
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# the next connection request from that IP address will be checked against
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# the entire list.
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#
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# If MACLIST_TTL is not specified or is specified as empty (e.g,
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# MACLIST_TTL="" or is specified as zero then 'maclist' lookups will not
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# be cached.
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MACLIST_TTL=
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################################################################################
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# P A C K E T D I S P O S I T I O N
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################################################################################
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