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Add a boolean to allow NAT from LAN or not, default to nat LAN (#2535)

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SVN-Revision: 9503
This commit is contained in:
Florian Fainelli
2007-11-05 14:19:16 +00:00
parent 547984d91d
commit 9d7192e5fa
1 changed files with 12 additions and 5 deletions
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9
package/iptables/files/firewall.init
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@@ -11,9 +11,13 @@ start() {
config_get WAN wan ifname config_get WAN wan ifname
config_get WANDEV wan device config_get WANDEV wan device
config_get LAN lan ifname config_get LAN lan ifname
config_get_bool NAT_LAN lan nat 1
if [ $NAT_LAN -ne 0 ]
then
config_get LAN_MASK lan netmask config_get LAN_MASK lan netmask
config_get LAN_IP lan ipaddr config_get LAN_IP lan ipaddr
LAN_NET=$(/bin/ipcalc.sh $LAN_IP $LAN_MASK | grep NETWORK | cut -d= -f2) LAN_NET=$(/bin/ipcalc.sh $LAN_IP $LAN_MASK | grep NETWORK | cut -d= -f2)
fi
## CLEAR TABLES ## CLEAR TABLES
for T in filter nat; do for T in filter nat; do
@@ -108,8 +112,11 @@ start() {
iptables -t nat -A PREROUTING -j prerouting_rule iptables -t nat -A PREROUTING -j prerouting_rule
[ -z "$WAN" ] || iptables -t nat -A PREROUTING -i "$WAN" -j prerouting_wan [ -z "$WAN" ] || iptables -t nat -A PREROUTING -i "$WAN" -j prerouting_wan
iptables -t nat -A POSTROUTING -j postrouting_rule iptables -t nat -A POSTROUTING -j postrouting_rule
### Only LAN ### Only LAN, unless told not to
if [ $NAT_LAN -ne 0 ]
then
[ -z "$WAN" ] || iptables -t nat -A POSTROUTING --src $LAN_NET/$LAN_MASK -o $WAN -j MASQUERADE [ -z "$WAN" ] || iptables -t nat -A POSTROUTING --src $LAN_NET/$LAN_MASK -o $WAN -j MASQUERADE
fi
iptables -t nat -A NEW -m limit --limit 50 --limit-burst 100 -j RETURN && \ iptables -t nat -A NEW -m limit --limit 50 --limit-burst 100 -j RETURN && \
iptables -t nat -A NEW -j DROP iptables -t nat -A NEW -j DROP