WesleyE's questions

I have a service setup that redirects after a succesfull login (Couchbase), but the IP it transfers to is an local one, where the client that is connecting to cannot reach.

How can I setup iptables so that I can route traffic generated by the client itself to another port?

• Client connects to server1
• Server1 sends Client the ip to connect to (Which is local to server1, not Client)
• Client gets redirected to 192.168.2.53:11210 (Can't reach)
• IPTables routes all traffic that is send to 192.168.2.53:11210 to outside_ip:11210

The HTTP service just returns and IP to connect to, thus 'redirecting' the Client, but not with a HTTP Redirect.

I'm not confortable with IPTables so I'm not eager to experiment with it/mess up and lose my ssh connection, I've seen some examples but none of them seem to work or do exactly what I want.

I just had a problem with our ISP; our internet connection was blocked because there was to much mail being send from our ip. The problem is that we all use gmail and that no mail is being send through the ISP SMTP server as far as we know (ISP blocks all traffic to port 25 if it is not on their server).

I blocked port 25 in advance, so no outgoing mail to that mail server can leave our network. But this does not reject mail send to ports on other servers.

What I would like to do is to find out what is sending those mails on our network. Is there a program that can identify mail packets and reject them using Ubuntu? Our Ubuntu router does not run a smtp server, by the way.