Qnewbie

我兩台VoIP server也是開放給其他人用的...所以不能用VPN連進去...
(因為user也多不太懂電腦/手機操作...莫 ...
電腦超人 發表於 2013-5-2 22:51

If this is the case, you might consider free PBX like PBXes.org.

Client <=> PBXes <=> Your Asterisk <=>...

I believe PBXes has better protection

Qnewbie

My case is simpler.

The free online PBX acts as bridge. For my asterisk, I add the free online PBX as a trunk. The client outside my asterisk registers to the same PBX.

The call process is a bit more complicated. Client dials an internal number(controlled by dialplan in the online PBX) to reach my asterisk(through inbound rules), then follows voice(menu) instructions(like pin-code or other stuff) to dial out.

I don't think it exposes your asterisk user. Your extensions can restrict to local network only.