>>>>> I know of an H.323 filter, but haven't explored SIP as we aren't >>>>> running any SIP application here yet. >>>>> >>>>> Another possibility would be a SIP proxy installed on the >>>>> firewall, but it is not as secure as a filter. >>>> asterisk IS a sip proxy. >>> Yes, well what I was hinting at was a dumbed-down install of >>> asterisk installed ON the firewall that would be responsible >>> for handing off calls coming in to and out of the network >>> from/to another larger asterisk system. >> You still have to setup the sip configuration to handle that. >> Not much >> dumb downing on that aspect. > > Well yes it's going to need some config, it won't need to know the > full config because it is just going to do a full hand-off to the > internal asterisk server for DID (does sip use DIDs?) routing. > It still needs a full SIP config. Just not the other stuff like voice menus, voicemail or what not.