When a Home Server Returns 403 Forbidden from Outside

403 Forbidden Error with UPnP

On my home server I run several nginx-proxy Docker containers, and I also make them accessible from outside on my own domain. Of course, on the fiber router facing the WAN I have ports 80 and 443 open, and connectivity from outside is confirmed. In this kind of setup, a symptom where access from outside was not possible started happening at irregular intervals Symptoms When the problem shows up from outside, access becomes impossible with a 403 Fobidden like the one below [Read More]