Hello
we have used freepbx and asterisk for a few years. all of our sip phones are within our intranet.
Now I want to use phones from off site.
Could someone point me to docs on how to do that?
thanks
Rob
ps -i have tried
telnet our-ip-address 5060
and get:
telnet: Unable to connect to remote host: Connection refused
This is more of a network issue than a FreePBX issue.
The ports required (by default) are UDP not TCP so telnet is uesless as a test.
By Default (and the RTP range should be reduced) the following are set:
Signalling (SIP) UDP 5060
Voice (RTP) UDP 10000-20000
RTP settings in etc/asterisk/rtp.conf
Look at the many articles on SIP and NAT with Asterisk. Use the SIP settings module to configure NAT support.
Security is a huge issue when opening ports to the Internet. Within hours a system exposed to the Internet will be located and compromised. I have seen losses in the 1000’s of dollars US per hour in toll fraud.
For this reason I recommend VPN’s. VPN capable routers are now below $100 so no excuse exists for not doing it right.