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21.7 Legacy Series / Random call audio drops on 3CX
« on: November 17, 2021, 12:20:09 pm »
Hi,
we are experiencing random call audio drops on our 3CX instance that is running behind an OPNsense firewall (virtualized in Proxmox).
When I set up the 3CX instance a few months ago, I followed the official guide for pfSense and haven't changed anything since: https://www.3cx.com/docs/pfsense-firewall/
Everything was working fine until about 2 weeks ago, when this issue suddenly started.
The audio randomly drops for all current calls simultaneously and doesn't come back until the call is terminated. This happens around 3-4 times a day.
I tried updating the OPNsense firewall from 21.1 to the newest 21.7 version, however this didn't help as well. The 3CX Firewall Checker completes without any issues.
When I put the 3CX instance directly behind a public IP without the OPNsense firewall everything works, so I know that this has to be a firewall issue.
I tried doing a packet capture but didn't see anything unusual.
Can anybody help with this issue?
Thanks in advance!
we are experiencing random call audio drops on our 3CX instance that is running behind an OPNsense firewall (virtualized in Proxmox).
When I set up the 3CX instance a few months ago, I followed the official guide for pfSense and haven't changed anything since: https://www.3cx.com/docs/pfsense-firewall/
Everything was working fine until about 2 weeks ago, when this issue suddenly started.
The audio randomly drops for all current calls simultaneously and doesn't come back until the call is terminated. This happens around 3-4 times a day.
I tried updating the OPNsense firewall from 21.1 to the newest 21.7 version, however this didn't help as well. The 3CX Firewall Checker completes without any issues.
When I put the 3CX instance directly behind a public IP without the OPNsense firewall everything works, so I know that this has to be a firewall issue.
I tried doing a packet capture but didn't see anything unusual.
Can anybody help with this issue?
Thanks in advance!