Network failure - No CA, Docker Updates, OS Updates

[Weru]

I'm not sure what happened, I hadn't changed any settings and no power outages. But now I can't connect to GitHub, update any applications, check the status of updates for plugins, dockers, or OS upgrades. 
What I have done:  
- Verified that GitHub, Docker, and AmazonAWS are up.

- Reset the server network settings, tried OpenDNS, Google, and CloudForge DNS servers.
- Turned off router DNS Redirect protection - can't find a setting for that on the server itself.
- Put the server in the DMZ to make sure the router isn't filter it.
- Turned off all VPN connections - now has a straight connection.
- Rebooted server several times.
- Ensured that router is not using Jumbo Frames, MTU set at 1500.
- Checked that SSL/TLS is off, and ran the rm command to ensure that there are no local encryption files.
- Added the CA proxy line to the flash drive.
- Tried rolling back to Unraid 6.11.3 - didn't help and now I can't get upgrade information.

Server runs, I can access the web interface. Just can't update any dockers, apps, OS.  

tower-diagnostics-20230512-1405.zip

[Squid]

2 hours ago, Weru said:

- Added the CA proxy line to the flash drive.

You don't want to do that as you're not using a proxy...

 

Can you 

ping -c3 8.8.8.8

 

Reboot the router, switch(s) etc

[Weru]

Removed the CA Proxy line from the flash drive.
Rebooted Modem, Router, and Switch. 
 

Quote

root@Tower:~# ping -c3 8.8.8.8
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
64 bytes from 8.8.8.8: icmp_seq=1 ttl=116 time=56.6 ms
64 bytes from 8.8.8.8: icmp_seq=2 ttl=116 time=56.4 ms
64 bytes from 8.8.8.8: icmp_seq=3 ttl=116 time=57.2 ms

--- 8.8.8.8 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2003ms
rtt min/avg/max/mdev = 56.422/56.725/57.169/0.320 ms

Also left the server off for an hour or so. 
Seems to be working again...
Is there something that I should be looking for to know when the server needs a nap to reset?

[JAnguita]

I'm having this problem frequently. It is solved after a few hours and it repeats after a few days or weeks.

 

I've set various DNS directly on my network setup but not solved it.

 

It is something very random.

Edited May 13, 2023 by JAnguita