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Add 'allowBcast' standard action

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git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@1539 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb
This commit is contained in:
teastep 2004-08-14 20:44:15 +00:00
parent fae7312553
commit bbe514b417
3 changed files with 38 additions and 2 deletions
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1
Shorewall2/actions.std
View File

@ -4,6 +4,7 @@
#
# Builtin Actions are:
#
# allowBcast #Silently Allow Broadcast/multicast
# dropBcast #Silently Drop Broadcast/multicast
# dropNonSyn #Silently Drop Non-syn TCP packets
# rejNonSyn #Silently Reject Non-syn TCP packets

36
Shorewall2/firewall
View File

@ -3017,7 +3017,7 @@ merge_levels() # $1=level at which superior action is called, $2=level at which
#
process_actions1() {
ACTIONS="dropBcast dropNonSyn dropNotSyn rejNotSyn dropInvalid"
ACTIONS="dropBcast allowBcast dropNonSyn dropNotSyn rejNotSyn dropInvalid"
USEDACTIONS=
strip_file actions
@ -3170,12 +3170,44 @@ process_actions3() {
fi
fi
;;
allowBcast)
if [ "$COMMAND" != check ]; then
if [ -n "$PKTTYPE" ]; then
case $xlevel in
none'!')
;;
*)
if [ -n "$xlevel" ]; then
log_rule_limit ${xlevel%\!} $xchain allowBcast $2 "" "$xtag" -m pkttype --pkt-type broadcast
log_rule_limit ${xlevel%\!} $xchain allowBcast $2 "" "$xtag" -m pkttype --pkt-type multicast
fi
;;
esac
run_iptables -A allowBcast -m pkttype --pkt-type broadcast -j ACCEPT
run_iptables -A allowBcast -m pkttype --pkt-type multicast -j ACCEPT
else
for address in $(find_broadcasts) 255.255.255.255 224.0.0.0/4 ; do
case $xlevel in
none*)
;;
*)
[ -n "$xlevel" ] && \
log_rule_limit ${xlevel%\!} $xchain allowBcast $2 "" "$xtag" -d $address
;;
esac
run_iptables -A $xchain -d $address -j ACCEPT
done
fi
fi
;;
dropNonSyn)
error_message "WARNING: \"dropNonSyn\" has been replaced by \"dropNotSyn\""
if [ "$COMMAND" != check ]; then
[ -n "$xlevel" ] && \
log_rule_limit ${xlevel%\!} $xchain dropBcast $2 "" "$xtag" -p tcp ! --syn
log_rule_limit ${xlevel%\!} $xchain dropNonSyn $2 "" "$xtag" -p tcp ! --syn
run_iptables -A $xchain -p tcp ! --syn -j DROP
fi
;;

3
Shorewall2/releasenotes.txt
View File

@ -264,3 +264,6 @@ New Features:
8) To improve interoperability, tunnels of type 'ipsec' no longer
enforce the use of source port 500 for ISAKMP.
9) A new 'allowBcast' builtin action has been added -- it silently
allows broadcasts and multicasts.