DNS firewall: How I (probably) resolved my issues after update 201 -> 203

Hi all, after updating one of my IPFire systems from 201 to 203 a couple of days ago, I notices issues with being able to reach certain web sites from the clients connected to IPFire:

  • several domains, even prominent ones like auth.openai.com were no longer reachable

  • several domains, although supposed to be blocked, were reachable

After reading a couple of articles here, I then successively did the following:

  • Ensure IPFire web proxy is off
  • Ensure no additional DNS servers than the ISP’s one were active

But no success.

Im an not 100% sure, but one or more of the following steps might have finally solved the issue on my side - in Web UI → Firewall → DNS Firewall → Lists:

  • Web UI → Firewall → DNS Firewall → Lists: activate/check all, save, deactivate/uncheck all, save, activate/check wanted lists, save
  • Web UI → Firewall → DNS Firewall → Custom Block And Allow List: Create a dummy entry in both “blocked domains” and “allowed domains”, save, then delete again the dummy entries, save

Anybody had a similar experience?

Have a great day!

Check here first.