Re: [CentOS] iptables port forwarding

On Thu, 2005-05-19 at 21:08 +0800, Mark Quitoriano wrote:

i'm having a problem viewing logs on forwarded ports from the firewall to another server, i forwarded mail(port 25) from the firewall to an internal server. The problem is when i try to view the logs it just shows the firewall ip as the sender and not the original sender.

In reality, the firewall may be making the connection to the internal server... and not the external machine. Especially if the internal server is on a 192.168.x.x or 10.x.x.x network and you are connecting via NAT. If that is the case, the external machine is connecting to the firewall and the firewall is connecting to the internal server.