Hello, I have the next problem and I do not know if I can solve it. I have a Cisco 1800 with IOS 12.4 that plays the role of the main router in our small company's network. There are three subnetworks, one for streaming, other one for hosting and a third one for accessing the Internet within our office.
I would like to know if it is possible to redirect all traffic for ANY outside smtp server to another port (for example, to 25000). I have tried to use the next command:
ip nat outside source static IP_OUTSIDE 25 IP_INSIDE 25000
... but the problem is that I have to specify the IP_OUTSIDE, since I could not find a way for redirecting ANY IP_OUTSIDE address.