forked from extern/shorewall_code
Allow BROADCAST = detect with -e
git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@3277 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb
This commit is contained in:
teastep
parent
222fb2c10f
commit
25e02e273f
@ -1218,8 +1218,6 @@ validate_interfaces_file() {
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options=$(separate_list $options)
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iface=$(chain_base $interface)
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[ -n "$EXPORT" -a x$networks = detect ] && startup_error "BROADCAST 'detect' is incompatible with the -e run-line option: Interface \"$interface\""
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eval ${iface}_broadcast="$networks"
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eval ${iface}_zone="$z"
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eval ${iface}_options=\"$options\"
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@ -1228,10 +1226,7 @@ validate_interfaces_file() {
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case $option in
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-)
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;;
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dhcp|tcpflags|arp_filter|routefilter|logmartians|sourceroute|blacklist|proxyarp|nosmurfs|upnp|-)
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;;
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maclist)
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[ -n "$EXPORT" ] && startup_error "The 'maclist' option is incompatible with the -e run-line option: Interface \"$interface\""
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dhcp|tcpflags|arp_filter|routefilter|maclist|logmartians|sourceroute|blacklist|proxyarp|nosmurfs|upnp|-)
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;;
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norfc1918)
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if [ $COMMAND = generate ]; then
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@ -1670,10 +1665,7 @@ validate_hosts_file() {
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for option in $(separate_list $options) ; do
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case $option in
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norfc1918|blacklist|tcpflags|nosmurfs|-)
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;;
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maclist)
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[ -n "$EXPORT" ] && startup_error "The 'maclist' option is incompatible with the -e run-line option: \"$host\""
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norfc1918|blacklist|maclist|tcpflags|nosmurfs|-)
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;;
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ipsec)
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[ -n "$POLICY_MATCH" ] || \
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@ -1850,19 +1842,34 @@ validate_policy()
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}
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#
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# Find broadcast addresses
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# Find broadcast addresses -- if we are compiling a script and 'detect' is specified for an interface
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# the function returns nothing for that interface
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#
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find_broadcasts() {
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for interface in $ALL_INTERFACES; do
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eval bcast=\$$(chain_base $interface)_broadcast
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if [ "x$bcast" = "xdetect" ]; then
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if [ $COMMAND != generate ]; then
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ip -f inet addr show $interface 2> /dev/null | grep 'inet.*brd' | sed 's/inet.*brd //; s/scope.*//;' | sort -u
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fi
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elif [ "x${bcast}" != "x-" ]; then
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echo $(separate_list $bcast)
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fi
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done
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}
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#
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# Find interfaces with BROADCAST=detect -- Only returns information if we are compiling a script
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#
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find_bcastdetect_interfaces() {
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if [ $COMMAND = generate ]; then
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for interface in $ALL_INTERFACES; do
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eval bcast=\$$(chain_base $interface)_broadcast
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[ "x$bcast" = "xdetect" ] && echo $interface
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done
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fi
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}
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#
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# Find interfaces that have the passed option specified
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#
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@ -1941,72 +1948,6 @@ run_user_exit() # $1 = file name
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fi
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}
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#
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# Add a logging rule.
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#
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log_rule_limit() # $1 = log level, $2 = chain, $3 = display Chain $4 = disposition , $5 = rate limit $6=log tag $7=command $... = predicates for the rule
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{
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local level=$1
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local chain=$2
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local displayChain=$3
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local disposition=$4
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local rulenum=
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local limit="${5:-$LOGLIMIT}"
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local tag=${6:+$6 }
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local command=${7:--A}
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local prefix
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local base=$(chain_base $displayChain)
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shift 7
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if [ -n "$tag" -a -n "$LOGTAGONLY" ]; then
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displayChain=$tag
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tag=
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fi
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if [ -n "$LOGRULENUMBERS" ]; then
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eval rulenum=\$${base}_logrules
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rulenum=${rulenum:-1}
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prefix="$(printf "$LOGFORMAT" $displayChain $rulenum $disposition)${tag}"
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rulenum=$(($rulenum + 1))
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eval ${base}_logrules=$rulenum
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else
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prefix="$(printf "$LOGFORMAT" $displayChain $disposition)${tag}"
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fi
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if [ ${#prefix} -gt 29 ]; then
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prefix="$(echo $prefix | truncate 29)"
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error_message "WARNING: Log Prefix shortened to \"$prefix\""
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fi
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case $level in
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ULOG)
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run_iptables $command $chain $@ $limit -j ULOG $LOGPARMS --ulog-prefix "$prefix"
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;;
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*)
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run_iptables $command $chain $@ $limit -j LOG $LOGPARMS --log-level $level --log-prefix "$prefix"
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;;
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esac
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if [ $? -ne 0 ] ; then
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[ -z "$STOPPING" ] && { stop_firewall; exit 2; }
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fi
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}
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log_rule() # $1 = log level, $2 = chain, $3 = disposition , $... = predicates for the rule
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{
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local level=$1
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local chain=$2
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local disposition=$3
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shift 3
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log_rule_limit $level $chain $chain $disposition "$LOGLIMIT" "" -A $@
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}
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#
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# Set /proc/sys/net/ipv4/ip_forward based on $IP_FORWARDING
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#
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@ -2997,6 +2938,23 @@ setup_mac_lists() {
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[ -n "$MACLIST_TTL" ] && chain=$(macrecent_target $interface) || chain=$(mac_chain $interface)
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if [ $COMMAND = generate ]; then
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cat >> $RESTOREBASE << __EOF__
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blob=\$(ip link show $interface 2> /dev/null)
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[ -z "\$blob" ] && \
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fatal_error "Interface $interface must be up before Shorewall can start"
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ip -f inet addr show $interface 2> /dev/null | grep 'inet.*brd' | sed 's/inet //; s/brd //; s/scope.*//;' | while read address broadcast; do
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address=\${address%/*}
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if [ -n "\$broadcast" ]; then
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$IPTABLES -t $MACLIST_TABLE -A $chain -s \$address -d \$broadcast -j RETURN
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fi
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done
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__EOF__
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else
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blob=$(ip link show $interface 2> /dev/null)
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[ -z "$blob" ] && \
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@ -3011,6 +2969,7 @@ setup_mac_lists() {
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run_iptables -t $MACLIST_TABLE -A $chain -s $address -d 255.255.255.255 -j RETURN
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run_iptables -t $MACLIST_TABLE -A $chain -s $address -d 224.0.0.0/4 -j RETURN
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done
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fi
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if [ -n "$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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@ -5312,6 +5271,29 @@ process_actions3() {
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run_iptables -A dropBcast -m pkttype --pkt-type broadcast -j DROP
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run_iptables -A dropBcast -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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cat >> $RESTOREBASE << __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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__EOF__
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case $xlevel in
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none*)
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;;
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*)
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[ -n "$xlevel" ] && \
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cat >> $RESTOREBASE << __EOF__
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log_rule_limit ${xlevel%\!} $xchain dropBcast DROP "" "$xtag" -A -d \$address
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__EOF__
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;;
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esac
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cat >> $RESTOREBASE << __EOF__
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$IPTABLES -A $xchain -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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case $xlevel in
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none*)
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@ -5344,6 +5326,29 @@ process_actions3() {
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run_iptables -A allowBcast -m pkttype --pkt-type broadcast -j ACCEPT
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run_iptables -A allowBcast -m pkttype --pkt-type multicast -j ACCEPT
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else
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for interface in $(find_bcastdetect_interfaces); do
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cat >> $RESTOREBASE << __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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__EOF__
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case $xlevel in
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none*)
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;;
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*)
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[ -n "$xlevel" ] && \
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cat >> $RESTOREBASE << __EOF__
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log_rule_limit ${xlevel%\!} $xchain allowBcast ACCEPT "" "$xtag" -A -d \$address
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__EOF__
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;;
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esac
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cat >> $RESTOREBASE << __EOF__
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$IPTABLES -A $xchain -d \$address -j
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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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case $xlevel in
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none*)
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@ -7979,19 +7984,45 @@ add_common_rules() {
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local broadcasts="$(find_broadcasts) 255.255.255.255 224.0.0.0/4"
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drop_broadcasts() {
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for interface in $(find_bcastdetect_interfaces); do
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cat >> $RESTOREBASE << __EOF__
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ip -f inet addr show $interface 2> /dev/null | grep 'inet.*brd' | sed 's/inet.*brd //; s/scope.*//;' | sort -u | while read address; do
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$IPTABLES -A reject -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 $broadcasts ; do
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run_iptables -A reject -d $address -j DROP
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done
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}
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#
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# Populate the smurf chain
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#
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[ $COMMAND = generate ] && save_progress_message "Setting up SMURF control..."
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for interface in $(find_bcastdetect_interfaces); do
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cat >> $RESTOREBASE << __EOF__
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ip -f inet addr show $interface 2> /dev/null | grep 'inet.*brd' | sed 's/inet.*brd //; s/scope.*//;' | sort -u | while read address; do
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__EOF__
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[ -n "$SMURF_LOG_LEVEL" ] && \
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cat >> $RESTOREBASE << __EOF__
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log_rule $SMURF_LOG_LEVEL smurfs DROP -s \$address
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__EOF__
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cat >> $RESTOREBASE << __EOF__
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$IPTABLES -A smurfs -s \$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 $broadcasts ; do
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[ -n "$SMURF_LOG_LEVEL" ] && log_rule $SMURF_LOG_LEVEL smurfs DROP -s $address
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run_iptables -A smurfs $(source_ip_range $address) -j DROP
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run_iptables -A reject -s $address -j DROP
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done
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#
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# Reject Rules -- Don't respond to broadcasts with an ICMP
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@ -8997,12 +9028,22 @@ compile_firewall() # $1 = File Name
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#
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. /usr/share/shorewall/functions
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stop_firewall()
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{
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exit 2
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}
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fatal_error()
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{
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echo " ERROR: \$@" >&2
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exit 2
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}
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run_iptables()
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{
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$IPTABLES \$@
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}
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if [ ! -f /usr/share/shorewall/version ] || [ \$(cat /usr/share/shorewall/version) != $VERSION ]; then
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fatal_error "This script requires Shorewall version $VERSION"
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fi
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@ -9014,10 +9055,17 @@ __EOF__
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save_command ". $(resolve_file $f)"
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cat >> $RESTOREBASE << __EOF__
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#
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# These variables are required by the library functions called in this script
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#
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COMMAND=restore
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[ -n \${QUIET:=0} ]
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MODULESDIR="$MODULESDIR"
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MODULE_SUFFIX="$MODULE_SUFFIX"
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LOGLIMIT="$LOGLIMIT"
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LOGTAGONLY="$LOGTAGONLY"
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LOGRULENUMBERS="$LOGRULENUMBERS"
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LOGFORMAT="$LOGFORMAT"
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STOPPING=
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load_kernel_modules
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@ -1129,4 +1129,70 @@ disable_ipv6() {
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fi
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}
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#
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# Add a logging rule.
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#
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log_rule_limit() # $1 = log level, $2 = chain, $3 = display Chain $4 = disposition , $5 = rate limit $6=log tag $7=command $... = predicates for the rule
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{
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local level=$1
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local chain=$2
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local displayChain=$3
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local disposition=$4
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local rulenum=
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local limit="${5:-$LOGLIMIT}"
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local tag=${6:+$6 }
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local command=${7:--A}
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local prefix
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local base=$(chain_base $displayChain)
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shift 7
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if [ -n "$tag" -a -n "$LOGTAGONLY" ]; then
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displayChain=$tag
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tag=
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fi
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if [ -n "$LOGRULENUMBERS" ]; then
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eval rulenum=\$${base}_logrules
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rulenum=${rulenum:-1}
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prefix="$(printf "$LOGFORMAT" $displayChain $rulenum $disposition)${tag}"
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rulenum=$(($rulenum + 1))
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eval ${base}_logrules=$rulenum
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else
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prefix="$(printf "$LOGFORMAT" $displayChain $disposition)${tag}"
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fi
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if [ ${#prefix} -gt 29 ]; then
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prefix="$(echo $prefix | truncate 29)"
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error_message "WARNING: Log Prefix shortened to \"$prefix\""
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fi
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case $level in
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ULOG)
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run_iptables $command $chain $@ $limit -j ULOG $LOGPARMS --ulog-prefix "$prefix"
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;;
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*)
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run_iptables $command $chain $@ $limit -j LOG $LOGPARMS --log-level $level --log-prefix "$prefix"
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;;
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esac
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if [ $? -ne 0 ] ; then
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[ -z "$STOPPING" ] && { stop_firewall; exit 2; }
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fi
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}
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log_rule() # $1 = log level, $2 = chain, $3 = disposition , $... = predicates for the rule
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{
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local level=$1
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local chain=$2
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local disposition=$3
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shift 3
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log_rule_limit $level $chain $chain $disposition "$LOGLIMIT" "" -A $@
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}
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SHOREWALL_LIBRARY=Loaded
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@ -79,8 +79,8 @@ New Features:
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1) The same version of Shorewall must be running on the remote system
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2) The 'detectnets' interface option is not allowed.
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3) 'detect' in the BROADCAST column of /etc/shorewall/ is not allowed.
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4) DETECT_DNAT_ADDRS=Yes is not allowed.
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3) DETECT_DNAT_ADDRS=Yes is not allowed.
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4) An interface name in the SUBNET column of /etc/shorewall/masq is not allowed.
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b) If you have extension scripts, they may need modification. The scripts
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will be run at generation time, rather than when the generated script
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Block a user