Hi,
I have iptables 1.2.2 (debian woody), kernel 2.4.25. In my network setup, I have an ADSL modem/router that does NAT and redirects all the smtp, http, etc requests to a Linux machine on inside. This works fine.
The problem: when I recently installed mailman, its scripts try to access smtp server via address that maps into the public IP address of the ADSL modem/router. So, requests never reach the mail server, which is running on the Linux machine itself.
I want to setup iptables so that any requests originating from the Linux server and destined to the public IP address of the ADSL modem/router are redirected to the Linux server itself.
I tried:
iptables -t nat -A OUTPUT -d public_ip -j REDIRECT
(rule was accepted).
I also tried:
iptables -t nat -A OUTPUT -d public_ip -p tcp -j DNAT --to lin_srv_ip
but the command failed ("iptables: Invalid argument").When I try "telnet public_ip smtp" I get 'connection refused' and when I then go with "iptables -t nat -v -L" it shows that no packet matched the REDIRECT rule.
Is there a simple way of achieving this? REDIRECT seems to be the right sort of action that I want, but it doesn't seem to work.
Regards, Milan
