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prepare for moving part of the firewall to hotplug. created new chains {input,forwarding,prerouting}_wan for wan port forwardings and updated the examples. syntax of /etc/config/firewall unchanged and old firewall.user files are still compatible

Browse Source 
SVN-Revision: 5878
v19.07.3_mercusys_ac12_duma
Felix Fietkau 18 years ago
parent 354a4b31a4
commit 4323774d59
3 changed files with 25 additions and 29 deletions
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24
package/iptables/files/firewall.awk
Unescape Escape View File

@ -1,20 +1,6 @@
# Copyright (C) 2006 OpenWrt.org
BEGIN {
print "ifname=\"$WAN\""
print "[ -z \"$ifname\" ] && exit"
print ""
print "iptables -X input_$ifname 2>&- >&-"
print "iptables -N input_$ifname"
print "iptables -X forward_$ifname 2>&- >&-"
print "iptables -N forward_$ifname"
print "iptables -t nat -X prerouting_$ifname 2>&- >&-"
print "iptables -t nat -N prerouting_$ifname"
print ""
print "iptables -A input_rule -i \"$ifname\" -j input_$ifname"
print "iptables -A forwarding_rule -i \"$ifname\" -j forward_$ifname"
print "iptables -t nat -A prerouting_rule -i \"$ifname\" -j prerouting_$ifname"
print ""
FS=":"
}
@ -32,15 +18,15 @@ BEGIN {
($1 == "accept") {
target = " -j ACCEPT"
for (o in _opt) {
print "iptables -t nat -A prerouting_$ifname" _opt[o] str2ipt($2) target
print "iptables -A input_$ifname " _opt[o] str2ipt($2) target
print "iptables -t nat -A prerouting_wan" _opt[o] str2ipt($2) target
print "iptables -A input_wan " _opt[o] str2ipt($2) target
print ""
}
}
($1 == "drop") {
for (o in _opt) {
print "iptables -t nat -A prerouting_$ifname" _opt[o] str2ipt($2) " -j DROP"
print "iptables -t nat -A prerouting_wan" _opt[o] str2ipt($2) " -j DROP"
print ""
}
}
@ -57,8 +43,8 @@ BEGIN {
else fwopts = ""
}
for (o in _opt) {
print "iptables -t nat -A prerouting_$ifname" _opt[o] str2ipt($2) target
print "iptables -A forward_$ifname " _opt[o] " -d " $3 fwopts " -j ACCEPT"
print "iptables -t nat -A prerouting_wan" _opt[o] str2ipt($2) target
print "iptables -A forwarding_wan " _opt[o] " -d " $3 fwopts " -j ACCEPT"
print ""
}
}

8
package/iptables/files/firewall.init
Unescape Escape View File

@ -18,10 +18,13 @@ start() {
done
iptables -N input_rule
iptables -N input_wan
iptables -N output_rule
iptables -N forwarding_rule
iptables -N forwarding_wan
iptables -t nat -N prerouting_rule
iptables -t nat -N prerouting_wan
iptables -t nat -N postrouting_rule
iptables -N LAN_ACCEPT
@ -42,6 +45,7 @@ start() {
# insert accept rule or to jump to new accept-check table here
#
iptables -A INPUT -j input_rule
[ -z "$WAN" ] || iptables -A INPUT -i $WAN -j input_wan
# allow
iptables -A INPUT -j LAN_ACCEPT # allow from lan/wifi interfaces
@ -85,6 +89,7 @@ start() {
# insert accept rule or to jump to new accept-check table here
#
iptables -A FORWARD -j forwarding_rule
[ -z "$WAN" ] || iptables -A FORWARD -i $WAN -j forwarding_wan
# allow
iptables -A FORWARD -i $LAN -o $LAN -j ACCEPT
@ -95,6 +100,7 @@ start() {
### MASQ
iptables -t nat -A PREROUTING -j prerouting_rule
[ -z "$WAN" ] || iptables -t nat -A PREROUTING -i "$WAN" -j prerouting_wan
iptables -t nat -A POSTROUTING -j postrouting_rule
[ -z "$WAN" ] || iptables -t nat -A POSTROUTING -o $WAN -j MASQUERADE
@ -111,8 +117,10 @@ stop() {
iptables -P OUTPUT ACCEPT
iptables -P FORWARD ACCEPT
iptables -F
iptables -X
iptables -t nat -P PREROUTING ACCEPT
iptables -t nat -P POSTROUTING ACCEPT
iptables -t nat -P OUTPUT ACCEPT
iptables -t nat -F
iptables -t nat -X
}

22
package/iptables/files/firewall.user
Unescape Escape View File

@ -7,22 +7,24 @@ iptables -F forwarding_rule
iptables -t nat -F prerouting_rule
iptables -t nat -F postrouting_rule
### BIG FAT DISCLAIMER
## The "-i $WAN" is used to match packets that come in via the $WAN interface.
## it WILL NOT MATCH packets sent from the $WAN ip address -- you won't be able
## to see the effects from within the LAN.
# The following chains are for traffic directed at the IP of the
# WAN interface
iptables -F input_wan
iptables -F forwarding_wan
iptables -t nat -F prerouting_wan
### Open port to WAN
## -- This allows port 22 to be answered by (dropbear on) the router
# iptables -t nat -A prerouting_rule -i $WAN -p tcp --dport 22 -j ACCEPT
# iptables -A input_rule -i $WAN -p tcp --dport 22 -j ACCEPT
# iptables -t nat -A prerouting_wan -p tcp --dport 22 -j ACCEPT
# iptables -A input_wan -p tcp --dport 22 -j ACCEPT
### Port forwarding
## -- This forwards port 8080 on the WAN to port 80 on 192.168.1.2
# iptables -t nat -A prerouting_rule -i $WAN -p tcp --dport 8080 -j DNAT --to 192.168.1.2:80
# iptables -A forwarding_rule -i $WAN -p tcp --dport 80 -d 192.168.1.2 -j ACCEPT
# iptables -t nat -A prerouting_wan -p tcp --dport 8080 -j DNAT --to 192.168.1.2:80
# iptables -A forwarding_wan -p tcp --dport 80 -d 192.168.1.2 -j ACCEPT
### DMZ
## -- Connections to ports not handled above will be forwarded to 192.168.1.2
# iptables -t nat -A prerouting_rule -i $WAN -j DNAT --to 192.168.1.2
# iptables -A forwarding_rule -i $WAN -d 192.168.1.2 -j ACCEPT
# iptables -t nat -A prerouting_wan -j DNAT --to 192.168.1.2
# iptables -A forwarding_wan -d 192.168.1.2 -j ACCEPT

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