Hi all. This morning I noticed that my Plex and all other docker containers were unable to reach the WAN. Also, when I open the Log or Shell windows in Unraid's UI I get just a blank window, and Community Apps says it can't reach anything. I have changed my server's network DNS config from Automatic, to OpenDNS's IPs but it didn't help.

If I try to ping or nslookup from an ssh session I get no response:

root@Tower:~# ping google.com

^C

root@Tower:~# nslookup google.com

;; communications error to 208.67.222.222#53: timed out

;; communications error to 208.67.222.222#53: timed out

;; communications error to 208.67.222.222#53: timed out

;; communications error to 208.67.220.220#53: timed out

;; no servers could be reached

All other devices on my network are functioning. I don't really understand what the issue could be. Diagnostics attached. Thanks!

tower-diagnostics-20260409-0933.zip

Please post output from cat /etc/resolv.conf

1 minute ago, JorgeB said:

Please post output from cat /etc/resolv.conf

root@Tower:~# cat /etc/resolv.conf

# Generated by rc.inet1

nameserver 208.67.222.222  # eth0:v4

nameserver 208.67.220.220  # eth0:v4

That looks OK, but the issue looks like a DNS problem, see if this works:

ping 8.8.8.8

If yes, set a static IP address, reboot, and post new diags.

This is wild. Finally looked in my OPNsense logs and can see that Crowdsec was blocking all traffic from my server:

Removed that decision, and immediately everything on Unraid started working again. Crowdsec shows it was a decision based on firewallservices/pf-scan-multi_ports from 4 hours ago, which is how long I've been scratching my head over this.