FreeSwitch can handle NAT traversal and hide topology so you can do things like header cleanup, codec normalization, like a full blown SBC or you can ack as a semi-topology hiding (no media) sip only b2bua... So you hide where the sip messages are going but stay outta the media path... As far as passing thru other sip requests IE: registrations or subscriptions going to another box etc... That's not really something at this time freeswitch can do...
From: Robert Dyck <rob.dyck@telus.net> Reply-To: <freeswitch-users@lists.freeswitch.org> Date: Sun, 3 Aug 2008 11:07:49 -0700 To: Freeswitch Users <freeswitch-users@lists.freeswitch.org> Subject: [Freeswitch-users] Freeswitch as a pseudo-proxy
I read that FS is a B2BUA and not a proxy. However a B2BUA can often behave as a call-stateful proxy. SIP INVITE comes to mind. Can FS passthrough other SIP requests? Can it mangle the headers to traverse NAT or hide the toplology?
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