Jabberd as International server/ logon jabberd server from outside

Hi friend

I m running jabberd2 server on my FC7. I want my jabberd user let access remotely from any network.
Is is possible to use jabberd2 server as international?
How?

My server network is below.

Local network---jabberd2server---Internet Server(getway)...........internet.

therefore, I use different machine as internet getway with firewall.