Failed to authenticate device with Server IP Address

FreePBX 13.0.197
Asterisk Version 13.23.1
Freepbx Distro: 10.13.66-22

[2019-08-03 09:37:43] NOTICE[17419][C-00000025] chan_sip.c: Failed to authenticate device sip:[email protected];tag=1757554836
[2019-08-01 00:31:20] NOTICE[23370][C-00000000] chan_sip.c: Failed to authenticate device sip:[email protected];tag=619170660
[2019-08-02 01:43:54] NOTICE[12702][C-00000006] chan_sip.c: Failed to authenticate device sip:[email protected];tag=1200836332

Server crash and have to do a full back and restore.
Since then I’ve been getting a lot of this messages
I have firewall and fail2ban enable
I normally blacklist the IP address but this time the x.x.x.x is the IP address of my server
I’m 100% certain I didn’t set up ext 30, 801 or test

I appreciate any info

Sounds a little like port 5160 is open to somewhere it shouldn’t be. Check your settings to make sure of the port number (you can set Chan-SIP up with 5060, or some other port) is blocked to the world.

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