Hi folks- I have an iptables question. I've tried a few things, but since this is my gateway/router I usually seem to end up killing internet access (or more strangely, slowing it right down for a time) when I try to work it out myself.
Here is the setup. What I need to do is to open an external port on the WAN side and direct it to a port on an internal machine. Can anyone suggest the required incantation to do the job? Many thanks! wlan0 is the LAN side and r...@squiddy:~# more startup #!/bin/bash sysctl -w net.ipv4.ip_forward=1 iptables -P FORWARD ACCEPT iptables --table nat -A POSTROUTING -o eth0 -j MASQUERADE iptables --table nat -A PREROUTING -i wlan0 -p tcp --dport 80 -j REDIRECT --to-port 3128 r...@squiddy:~# iptables-save # Generated by iptables-save v1.4.4 on Thu Apr 22 10:18:53 2010 *nat :PREROUTING ACCEPT [132042:12331577] :POSTROUTING ACCEPT [18152:3537221] :OUTPUT ACCEPT [82653:10602042] -A PREROUTING -i wlan0 -p tcp -m tcp --dport 80 -j REDIRECT --to-ports 3128 -A POSTROUTING -o eth0 -j MASQUERADE COMMIT # Completed on Thu Apr 22 10:18:53 2010 # Generated by iptables-save v1.4.4 on Thu Apr 22 10:18:53 2010 *filter :INPUT ACCEPT [9519853:1538511432] :FORWARD ACCEPT [4638871:616558804] :OUTPUT ACCEPT [8536672:1749833220] COMMIT # Completed on Thu Apr 22 10:18:53 2010 -- Next meeting: Unknown http://dorset.lug.org.uk/ http://www.linkedin.com/groups?gid=2645413 Chat: http://www.mibbit.com/?server=irc.blitzed.org&channel=%23dorset List info: https://mailman.lug.org.uk/mailman/listinfo/dorset
