disable the MSS fixup hack by default (most ISPs don't require this as a workaround...

[openwrt/svn-archive/archive.git] / package / firewall / files / uci_firewall.sh

diff --git a/package/firewall/files/uci_firewall.sh b/package/firewall/files/uci_firewall.sh
index 5798b7fc48bb617e07493a84858a53fd2efa2db8..41b2b5f76c399274fb871673c5ad3fd36549358a 100755 (executable)
--- a/package/firewall/files/uci_firewall.sh
+++ b/package/firewall/files/uci_firewall.sh
@@ -41,6 +41,7 @@ create_zone() {
        config_set $ZONE_LIST $1 1 
 
        $IPTABLES -N zone_$1
+       $IPTABLES -N zone_$1_MSSFIX
        $IPTABLES -N zone_$1_ACCEPT
        $IPTABLES -N zone_$1_DROP
        $IPTABLES -N zone_$1_REJECT
@@ -60,6 +61,7 @@ addif() {
        [ -n "$dev" -a "$dev" == "$1" ] && return
        logger "adding $1 to firewall zone $2"
        $IPTABLES -A input -i $1 -j zone_$2
+       $IPTABLES -I zone_$2_MSSFIX 1 -o $1 -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu
        $IPTABLES -I zone_$2_ACCEPT 1 -o $1 -j ACCEPT
        $IPTABLES -I zone_$2_DROP 1 -o $1 -j DROP
        $IPTABLES -I zone_$2_REJECT 1 -o $1 -j reject
@@ -147,7 +149,6 @@ fw_defaults() {
        $IPTABLES -A OUTPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
        
        $IPTABLES -A FORWARD -m state --state INVALID -j DROP
-       $IPTABLES -A FORWARD -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu
        $IPTABLES -A FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
        
        $IPTABLES -A INPUT -i lo -j ACCEPT
@@ -157,6 +158,9 @@ fw_defaults() {
        config_get syn_rate $1 syn_rate
        config_get syn_burst $1 syn_burst
        [ "$syn_flood" == "1" ] && load_synflood $syn_rate $syn_burst
+       
+       echo "Adding custom chains"
+       fw_custom_chains
 
        $IPTABLES -N input
        $IPTABLES -N output
@@ -170,9 +174,6 @@ fw_defaults() {
        $IPTABLES -A reject -p tcp -j REJECT --reject-with tcp-reset
        $IPTABLES -A reject -j REJECT --reject-with icmp-port-unreachable
 
-       echo "Adding custom chains"
-       fw_custom_chains
-
        fw_set_chain_policy INPUT "$DEF_INPUT"
        fw_set_chain_policy OUTPUT "$DEF_OUTPUT"
        fw_set_chain_policy FORWARD "$DEF_FORWARD"
@@ -216,10 +217,13 @@ fw_rule() {
        config_get proto $1 proto
        config_get target $1 target
        config_get ruleset $1 ruleset
-
+       
+       ZONE=input
+       TARGET=$target
        [ -z "$target" ] && target=DROP
-       [ -n "$src" ] && ZONE=zone_$src || ZONE=input
-       [ -n "$dest" ] && TARGET=zone_${dest}_$target || TARGET=$target
+       [ -n "$src" -a -z "$dest" ] && ZONE=zone_$src
+       [ -n "$src" -a -n "$dest" ] && ZONE=zone_${src}_forward
+       [ -n "$dest" ] && TARGET=zone_${dest}_$target
        add_rule() {
                $IPTABLES -I $ZONE 1 \
                        ${proto:+-p $proto} \
@@ -247,9 +251,11 @@ fw_forwarding() {
 
        config_get src $1 src
        config_get dest $1 dest
+       config_get_bool mtu_fix $1 mtu_fix 0
        [ -n "$src" ] && z_src=zone_${src}_forward || z_src=forward
        [ -n "$dest" ] && z_dest=zone_${dest}_ACCEPT || z_dest=ACCEPT
        $IPTABLES -I $z_src 1 -j $z_dest
+       [ "$mtu_fix" -gt 0 -a -n "$dest" ] && $IPTABLES -I $z_src 1 -j zone_${dest}_MSSFIX
 }
 
 fw_redirect() {