I recently just had a major issue develop with one of my servers. When I try to access the admin panel, I'm getting a 403 Forbidden error. I've spent hours searching for help on how to fix this and after trying everything short of re-installing ISPConfig, nothing has helped.
If anyone can help me sort this out, it would be MUCH appreciated.
About the only thing I've found that doesn't look like it's setup the way it should be is.
[error] an unknown filter was not added: PHP
showing up in the apache error logs many times.