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-rwxr-xr-xpackage/iptables/files/firewall.init9
1 files changed, 5 insertions, 4 deletions
diff --git a/package/iptables/files/firewall.init b/package/iptables/files/firewall.init
index 9d8a405ab..e1013fb8e 100755
--- a/package/iptables/files/firewall.init
+++ b/package/iptables/files/firewall.init
@@ -11,6 +11,9 @@ start() {
config_get WAN wan ifname
config_get WANDEV wan device
config_get LAN lan ifname
+ config_get LAN_MASK lan netmask
+ config_get LAN_IP lan ipaddr
+ LAN_NET=$(/bin/ipcalc.sh $LAN_IP $LAN_MASK | grep NETWORK | cut -d= -f2)
## CLEAR TABLES
for T in filter nat; do
@@ -105,10 +108,8 @@ start() {
iptables -t nat -A PREROUTING -j prerouting_rule
[ -z "$WAN" ] || iptables -t nat -A PREROUTING -i "$WAN" -j prerouting_wan
iptables -t nat -A POSTROUTING -j postrouting_rule
- ### Only RFC1918 addresses
- [ -z "$WAN" ] || iptables -t nat -A POSTROUTING --src 192.168.0.0/16 -o $WAN -j MASQUERADE
- [ -z "$WAN" ] || iptables -t nat -A POSTROUTING --src 172.16.0.0/12 -o $WAN -j MASQUERADE
- [ -z "$WAN" ] || iptables -t nat -A POSTROUTING --src 10.0.0.0/8 -o $WAN -j MASQUERADE
+ ### Only LAN
+ [ -z "$WAN" ] || iptables -t nat -A POSTROUTING --src $LAN_NET/$LAN_MASK -o $WAN -j MASQUERADE
iptables -t nat -A NEW -m limit --limit 50 --limit-burst 100 -j RETURN && \
iptables -t nat -A NEW -j DROP