[Asterisk-Users] problem facing on Firewall, NAT and asterisk

[el Flynn]

prasad_s wrote:

<snip>
> But the problem is when I call internally between two sip client I don't get voice path between these two sip phones, i.e. I can not talk and hear from both phones,
> though I get message on the asterisk server "connected".
> Is this because of Firewall and NAT between my sip client and asterisk server?

Yes.

> But then how I get register to asterisk server?
> Is there any workaround for this problem

Read this: http://www.voip-info.org/wiki-NAT+and+VOIP

Flynn