Just to properly close the loop. After deeper inspection, the root cause was confirmed: a client-side JavaScript resource was blocked by endpoint security, which resulted in AJAX failures in the KeyHelp panel. This is not a Kaspersky-specific issue. Any endpoint security solution performing ...

Final update – root cause found after 12h :D :) . I restored a snapshot and repeated all tests. After disabling Kaspersky Premium on my local machine, everything works correctly. With Kaspersky disabled: firewall can be enabled and disabled firewall rules can be added no AJAX errors appear The issue ...

Good question – I checked this now more carefully. I wanted to capture the exact AJAX error from the browser console (F12), but while doing so I noticed something important: After disabling Kaspersky Internet Security on my local machine, the AJAX error no longer occurs. It seems that Kaspersky was b ...

Hello Tobi, thank you for the reply. Below are the clarifications you asked for. 1) Full hostname The current and only system hostname in use is: vmi2967565.contaboserver.net 2) Cloudflare usage Cloudflare is used only for domains hosted on the server (websites managed by KeyHelp). Important: The ...

KeyHelp firewall / AJAX issue after hostname change (Ubuntu 22.04, Contabo VPS) Hello everyone, I am experiencing a serious and reproducible issue with KeyHelp installed on my own Contabo VPS , and I would appreciate any guidance. Environment OS: Ubuntu 22.04 (64-bit) KeyHelp: 25.3 (Build 3569 ...