August 16th, 2007

Redirecting SMTP

Due to my new appartement I have a new ISP, like all of them reroutes every connection on port 25 to it’s own smtp server. This is fine if you use their e-mail service but not if you are a domain owner or small company that just wants to use it’s own mail server. Today I fixed this issue in 10 minutes using rinetd on a server of mine, it redirects tcp traffic from one port to another, bypassing port 25 until I’m past my isp network.