[afnog] mail server

[Stephane Bortzmeyer]

On Tue, Dec 16, 2008 at 10:01:36AM +0300,
 Hyeroba Peter <phyeroba at cfi.co.ug> wrote 
 a message of 21 lines which said:

> I have a mail server on that also doubles as a firewall, its an suse
> enterprise server, the problem is I can access the openwebmail off
> the internet but cannot access it over the local network.

As always, "cannot" is not a proper error message.

1) What command did you type?
2) What result did you get?

Example: "I type telnet mywebmail.example 80 and I get "Connection
foobared at 192.0.2.1"

Remember that graphical behemoths like Firefox (and, worse, IE) are
very poor debugging tools.

Typical tools to debug system and network administration problems:

- telnet (you can give a port number after the host name to test
  various services)

- ping (to check IP routing)

- the log of the server (if the connection was refused by the server,
  if the firewall is Linux Netfilter, dmesg - if the target is LOG -
  or 'iptables -v -L CHAINNAME' may help)

...