Audio Issue

[dcc65534]

Running 3CX 18.0 (Build 418)
The firewall test passed on everything. Using Flowroute as a SIP trunk provider.

Issue: Inbound calls work fine for a while but after a certain time, when callers call in they no longer hear the IVR.
At that point the only thing that fixes it is a reboot, which is a problem if people are on calls.

 

[cobaltit]

When you say the firewall checker passed, when did you last run it? Your scenario seems to indicate you don't have all of the RTP ports open.

 

[dcc65534]

When you say the firewall checker passed, when did you last run it? Your scenario seems to indicate you don't have all of the RTP ports open.

About a month or so ago. These are the open ports.

5061	TCP
5061	UDP
5090	TCP
5090	UDP
5060	TCP
5060	UDP
9000-9398	UDP
10600-10998	UDP

 

[SteveITS]

You're missing a few between 9399-10599, plus 10999
5061/UDP is unnecessary.
https://www.3cx.com/docs/ports/

 

[dcc65534]

You're missing a few between 9399-10599, plus 10999
5061/UDP is unnecessary.
https://www.3cx.com/docs/ports/

I just opened more UDP ports once CobaltIT said it sounded like I was missing some.
So far, so good. I was trying to be as restrictive as possible in the ruleset, but it seems to be more harm than good.

7000-8999	UDP
9000-10999	UDP

 

[SteveITS]

Note 7000-8999 is not required/used for external connections. It would be much clearer if they made 7000 its own row in the table, but it is intended for "LAN" and port forwarding = "No..."

 

[dcc65534]

Note 7000-8999 is not required/used for external connections. It would be much clearer if they made 7000 its own row in the table, but it is intended for "LAN" and port forwarding = "No..."

I thought just for funsies I'd open it and packet sniff to see if something is trying to use it.