Every now and then I hear questions on how to secure servers and especially how to secure voice traffic. We hear lots of myths from our customers :).
Most people feel more secure if they have a simple firewall installed.
While firewalls are good, having a firewall to protect closed ports usually doesn’t help. I mean for VoipNow you will probably leave opened all ports for VoIP services and close most of the others. My question is: what is the point of doing this at server level, if the ports are closed anyway? This makes sense on a consumer desktop, but on a server it usually does not help much.