[asterisk-users] port 5060 is blocked by ISP

[Thomas Kenyon]

alok srivastava wrote:
> dear
> i have configured properly asterisk. At the one end i am using x-lite 
> soft ph and another end twinkle. call is going properly from both end 
> but after picking the phone not able to listen other one.
> when i checked the port 5060 on the asterisk server it is always showing 
> closed while i have flushed all the rules from iptables (iptables -F)
> 
> PORT     STATE  SERVICE VERSION
> 5060/tcp closed sip
> 
>  telnet localhost 5060 (could not connect)
> 
> regards
> alok
> 
> 
SIP is only used to setup (and stop etc.) the call. The actual audio is 
sent via rtp.

/etc/asterisk/rtp.conf

Should tell which ports asterisk is using for rtp, you will need to make 
sure that the remote host can connect to these ports.

There are lots of articles around on how to resolve this.