Add a boolean to allow NAT from LAN or not, default to nat LAN (#2535)
SVN-Revision: 9503
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1 changed files with 12 additions and 5 deletions
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@ -11,9 +11,13 @@ start() {
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config_get WAN wan ifname
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config_get WAN wan ifname
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config_get WANDEV wan device
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config_get WANDEV wan device
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config_get LAN lan ifname
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config_get LAN lan ifname
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config_get LAN_MASK lan netmask
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config_get_bool NAT_LAN lan nat 1
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config_get LAN_IP lan ipaddr
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if [ $NAT_LAN -ne 0 ]
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LAN_NET=$(/bin/ipcalc.sh $LAN_IP $LAN_MASK | grep NETWORK | cut -d= -f2)
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then
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config_get LAN_MASK lan netmask
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config_get LAN_IP lan ipaddr
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LAN_NET=$(/bin/ipcalc.sh $LAN_IP $LAN_MASK | grep NETWORK | cut -d= -f2)
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fi
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## CLEAR TABLES
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## CLEAR TABLES
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for T in filter nat; do
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for T in filter nat; do
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@ -108,8 +112,11 @@ start() {
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iptables -t nat -A PREROUTING -j prerouting_rule
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iptables -t nat -A PREROUTING -j prerouting_rule
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[ -z "$WAN" ] || iptables -t nat -A PREROUTING -i "$WAN" -j prerouting_wan
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[ -z "$WAN" ] || iptables -t nat -A PREROUTING -i "$WAN" -j prerouting_wan
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iptables -t nat -A POSTROUTING -j postrouting_rule
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iptables -t nat -A POSTROUTING -j postrouting_rule
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### Only LAN
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### Only LAN, unless told not to
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[ -z "$WAN" ] || iptables -t nat -A POSTROUTING --src $LAN_NET/$LAN_MASK -o $WAN -j MASQUERADE
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if [ $NAT_LAN -ne 0 ]
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then
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[ -z "$WAN" ] || iptables -t nat -A POSTROUTING --src $LAN_NET/$LAN_MASK -o $WAN -j MASQUERADE
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fi
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iptables -t nat -A NEW -m limit --limit 50 --limit-burst 100 -j RETURN && \
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iptables -t nat -A NEW -m limit --limit 50 --limit-burst 100 -j RETURN && \
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iptables -t nat -A NEW -j DROP
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iptables -t nat -A NEW -j DROP
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