Firewall ports and NAT

[mrcottonmouth]

My server is behind a Linksys firewall. Which ports for I need to forward to the Zimbra server?

[anand]

you should allow external ports (left side in the list) for services you'd like exposed: Questions Before I Start

[dkepper]

I am also having a firewall problem. I have done a one to one nat with an external address mapped to the internal address that Zimbra is on. In Iptables I have made two rules. These rules are as follows:
iptables -A INPUT -s external ip address -p 25 -j ACCEPT The same for port 110.
From an internal network address I can telnet to port 25 and 110. From an external address telneting to the mapped external address I get no response. I have looked at http://www.zimbra.com/forums/showth...highlight=ports and was wondering if I should also make rules for the Zimbra mapped ports? Any other ideas, links, suggestions appreciated.

Thank you

[KevinH]

You should only need 25/110 etc but you might want to try our internal service ports just to see if that works. Might help you narrow the problem.