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Add MAC verification
git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@306 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb
This commit is contained in:
teastep
parent
9f691d20e4
commit
cd555022bf
@ -101,6 +101,8 @@ restore_file /etc/shorewall/proxyarp
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restore_file /etc/shorewall/routestopped
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restore_file /etc/shorewall/maclist
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restore_file /etc/shorewall/masq
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restore_file /etc/shorewall/modules
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@ -511,7 +511,7 @@ validate_interfaces_file() {
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case $option in
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dhcp|noping|filterping|routestopped|norfc1918|multi)
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;;
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routefilter|dropunclean|logunclean|blacklist|proxyarp|-)
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routefilter|dropunclean|logunclean|blacklist|proxyarp|maclist|-)
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;;
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*)
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error_message "Warning: Invalid option ($option) in record \"$r\""
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@ -925,6 +925,30 @@ find_broadcasts() {
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done < $TMP_DIR/interfaces
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}
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################################################################################
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# Find interface broadcast addresses #
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################################################################################
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find_interface_broadcasts() # $1 = Interface name
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{
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while read z interface bcast options; do
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expandv interface bcast
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if [ "$interface" = "$1" ]; then
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if [ "x$bcast" = "xdetect" ]; then
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addr="`ip addr show $interface 2> /dev/null`"
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if [ -n "`echo "$addr" | grep 'inet.*brd '`" ]; then
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addr="`echo "$addr" | \
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grep "inet " | sed 's/^.* inet.*brd //;s/scope.*//'`"
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echo $addr | cut -d' ' -f 1
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fi
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elif [ "x${bcast}" != "x-" ]; then
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echo `separate_list $bcast`
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fi
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return
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fi
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done < $TMP_DIR/interfaces
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}
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################################################################################
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# Find interface address--returns the first IP address assigned to the passed #
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# device #
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@ -1276,6 +1300,57 @@ setup_proxy_arp() {
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done
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}
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###############################################################################
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# Set up MAC List Chains #
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###############################################################################
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setup_mac_lists() {
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for interface in $maclist_interfaces; do
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createchain ${interface}_mac no
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done
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strip_file maclist
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while read interface mac address; do
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chain=${interface}_mac
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if ! havechain $chain ; then
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error_message "Warning: $interface does not have the maclist option specified"
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continue
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fi
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[ -n "$address" ] && addr_match="-s $address" || addr_match=
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run_iptables -A ${interface}_mac `mac_match $mac` $addr_match -j RETURN
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done < $TMP_DIR/maclist
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if [ -n "$MACLIST_LOG_LEVEL" ]; then
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logpart="-j LOG $LOGPARMS --log-level $MACLIST_LOG_LEVEL --log-prefix"
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else
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logpart=
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fi
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for interface in $maclist_interfaces; do
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chain=${interface}_mac
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#
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# Must take care of our own broadcasts
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#
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source="-s `find_interface_address $interface`"
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for address in `find_interface_broadcasts $interface` 255.255.255.255 ; do
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run_iptables -A $chain $source -d $address -j RETURN
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done
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[ -n "$logpart" ] && \
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run_iptables -A $chain $logpart "Shorewall:$chain:$MACLIST_DISPOSITION:"
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run_iptables -A $chain -j $maclist_target
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run_iptables -A `input_chain $interface` -m state --state NEW -j $chain
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run_iptables -A `forward_chain $interface` -m state --state NEW -j $chain
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done
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}
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###############################################################################
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# Set up SYN flood protection #
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###############################################################################
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@ -3335,6 +3410,13 @@ define_firewall() # $1 = Command (Start or Restart)
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[ -f $tunnels ] && \
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echo "Processing $tunnels..." && setup_tunnels $tunnels
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maclist_interfaces=`find_interfaces_by_option maclist`
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if [ -n "$maclist_interfaces" ] ; then
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echo "Setting up MAC Verification on $maclist_interfaces..."
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setup_mac_lists
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fi
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rules=`find_file rules`
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echo "Processing $rules..."
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@ -3882,6 +3964,8 @@ do_initialize() {
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NEWNOTSYN=
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LOGNEWNOTSYN=
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FORWARDPING=
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MACLIST_DISPOSITION=
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MACLIST_LOG_LEVEL=
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stopping=
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have_mutex=
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masq_seq=1
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@ -3961,6 +4045,24 @@ do_initialize() {
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MERGE_HOSTS=`added_param_value_no MERGE_HOSTS $MERGE_HOSTS`
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FORWARDPING=`added_param_value_no FORWARDPING $FORWARDPING`
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NEWNOTSYN=`added_param_value_yes NEWNOTSYN $NEWNOTSYN`
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maclist_target=reject
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if [ -n "$MACLIST_DISPOSITION" ] ; then
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case $MACLIST_DISPOSITION in
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REJECT)
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;;
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ACCEPT|DROP)
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maclist_target=$MACLIST_DISPOSITION
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;;
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*)
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startup_error "Invalid value ($MACLIST_DISPOSITION) for MACLIST_DISPOSITION"
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;;
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esac
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else
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MACLIST_DISPOSITION=REJECT
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fi
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}
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################################################################################
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@ -382,6 +382,15 @@ else
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echo -e "\nStopped Routing file installed as ${PREFIX}/etc/shorewall/routestopped"
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fi
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#
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# Install the Mac List file
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#
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if [ -f ${PREFIX}/etc/shorewall/maclist ]; then
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backup_file /etc/shorewall/maclist
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else
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run_install -o $OWNER -g $GROUP -m 0600 maclist ${PREFIX}/etc/shorewall/maclist
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echo -e "\nMAC list file installed as ${PREFIX}/etc/shorewall/maclist"
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fi
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#
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# Install the Masq file
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#
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if [ -f ${PREFIX}/etc/shorewall/masq ]; then
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@ -81,6 +81,11 @@
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# . . blacklist - Check packets arriving on this interface
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# against the /etc/shorewall/blacklist
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# file.
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# maclist - Connection requests from this interface
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# are compared against the contents of
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# /etc/shorewall/maclist. If this option
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# is specified, the interface must be
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# up before Shorewall is started.
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# proxyarp -
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# Sets
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# /proc/sys/net/ipv4/conf/<interface>/proxy_arp.
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@ -383,4 +383,25 @@ FORWARDPING=Yes
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NEWNOTSYN=No
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#
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# MAC List Disposition
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#
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# This variable determines the disposition of connection requests arriving
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# on interfaces that have the 'maclist' option and that are from a device
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# that is not listed for that interface in /etc/shorewall/maclist. Valid
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# values are ACCEPT, DROP and REJECT. If not specified or specified as
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# empty (MACLIST_DISPOSITION="") then REJECT is assumed
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MACLIST_DISPOSITION=REJECT
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#
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# MAC List Log Level
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#
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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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MACLIST_LOG_LEVEL=info
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#LAST LINE -- DO NOT REMOVE
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@ -85,6 +85,7 @@ fi
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%attr(0600,root,root) %config(noreplace) /etc/shorewall/params
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%attr(0600,root,root) %config(noreplace) /etc/shorewall/proxyarp
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%attr(0600,root,root) %config(noreplace) /etc/shorewall/routestopped
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%attr(0600,root,root) %config(noreplace) /etc/shorewall/maclist
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%attr(0600,root,root) %config(noreplace) /etc/shorewall/masq
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%attr(0600,root,root) %config(noreplace) /etc/shorewall/modules
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%attr(0600,root,root) %config(noreplace) /etc/shorewall/tcrules
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@ -100,6 +101,8 @@ fi
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%doc COPYING INSTALL changelog.txt releasenotes.txt tunnel
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%changelog
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* Tue Oct 22 2002 Tom Eastep <tom@shorewall.net>
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- Added maclist file
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* Tue Oct 15 2002 Tom Eastep <tom@shorewall.net>
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- Changed version to 1.3.10
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- Replaced symlink with real file
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