Basically I need a VoIP server on a DMZ with outgoing SMTP blocked.
I have placed it on a DMZ and blocked its IP's outgoing SMTP on the router, does the block overwrite the DMZ? or once it is in the DMZ is it completely open?
I tried to test it through telnet but it did not respond to the normal commands used for testing SMTP over telnet.
so if anyone can let me know whether or not it would have blocked the SMTP outgoing even though it was in a DMZ, or also how to test SMTP on a linux box that would be great.