Remote Extension

FreePBX Networking
1

I try to setup remote extensions through port forwarding. The problem is my pbx is unreachable.

I’m confident that all NAT settings on pbx and my router are correct.

Port Forward ports 5060 (UDP) , 10000-20000 (UDP) , local IP from PBX 192.168.1.21

Responsive Firewall is enable alongside SIP Protocol (pjsip) option.

I also disabled SIP ALG on my router

Finally I checked out if my ISP blocks any ports, its not.

I use canyouseeme to check ports and the message is:Connection timed out

** I completely disabled firewall on PBX , connection refused.

*** I also changed the version of PBX from 17 to 16.

**** I also changed the router itself just in case.

Any ideas?

2

If your firewall/router is able to take pcaps or logs for incoming traffic, I would try to see if the traffic to 5060 is visible in your main firewall.
If yes, then it has to be something on the PBX side.
AFAIK canyouseeme can only tests TCP ports, unless you open 5060 TCP you won’t be able to test that.

3

So, for clarity :

  • Your FreePBX is inside of a network.
  • You have a firewall in front of it

Your remote extension :

  • Is that a physical phone or softphone on another network ?
  • or a softphone on a cell phone ?

In FreePBX, look to see in the firewall under “Intrusion Detection” If you accidentally blacklisted yourself. I have done this MANY times where I set up the extension on FreePBX, forget to hit apply changes, set up the remote extension and make it go, before the extension is actually active on FreePBX, thus resulting in banning myself instantly. Have to then remove the remote IP address from intrusion detection.

4

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