Cannot upgrade / send emails / fetch themes... Docker problem?

Product Support
9

I’m just posting to update on the situation. It got solved with help from ChatGPT.

After trying different solutions, this part showed that something was wrong with the permissions or security policies:

  1. Try Running a Container with the --privileged Flag

This bypasses some restrictions that might be affecting networking.

docker run --rm --privileged alpine ping -c 4 github.com

If this works, it suggests a permissions or security policy issue.

After that, applied the next suggestion:

  1. Check iptables Rules Again

Since Docker relies on iptables, let’s confirm it has the correct forwarding rules.

Run:

sudo iptables -t nat -L -v -n | grep -i docker

If no Docker-related rules appear, manually add them:

sudo iptables -P FORWARD ACCEPT

sudo iptables -A FORWARD -i docker0 -o eth0 -j ACCEPT

sudo iptables -t nat -A POSTROUTING -s 172.17.0.0/16 ! -o docker0 -j MASQUERADE

Then restart Docker:

sudo systemctl restart docker

And test again.

… which totally did it. :grin: