All IAX2 Unreachable

Hello, first time asking help here.

After a provider issue and few reboot, all the IAX channels became unreachable.

Those same IAX channels are working on another server, which means the problem should be on this specific server.
I haven’t changed any configuration file, and it has been working for years now.

I have tried rebooting, reload iax config, ping working.
Any ideas what should I do to find the issue ? thanks

Tx-Frame Retry[001] -- OSeqno: 000 ISeqno: 000 Type: IAX     Subclass: REGREQ
   Timestamp: 00003ms  SCall: 02725  DCall: 00000 [*.*.*.*:4569]
   USERNAME        : ************
   REFRESH         : 60

Tx-Frame Retry[001] -- OSeqno: 000 ISeqno: 000 Type: IAX     Subclass: REGREQ
   Timestamp: 00003ms  SCall: 00553  DCall: 00000 [-.-.-.-:4569]
   USERNAME        : ----------
   REFRESH         : 60

Tx-Frame Retry[000] -- OSeqno: 000 ISeqno: 000 Type: IAX     Subclass: POKE
   Timestamp: 00003ms  SCall: 00072  DCall: 00000 [-.-.-.-:4569]

Tx-Frame Retry[000] -- OSeqno: 000 ISeqno: 000 Type: IAX     Subclass: POKE
   Timestamp: 00003ms  SCall: 03906  DCall: 00000 [*.*.*.*:4569]

Or on any piece of net gear between point A and B.

Can you run 'tcpdump' on this host (‘A’) to confirm packets are being sent to the correct IP address?

Can you run 'tcpdump' on the endpoint (‘B’) to confirm packets are being received?

Then step through each hop in between and see who is dropping your packets.

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