Not hestiacp related but input would be great

I have a local proxmox server that i host cctv server, hestiacp etc on.

By no means am i technically inclined on these sustems but i would like to hear your views on why fail2ban would be blocking my local router?

Just looking for your thoughts on this? Not looking for sypport because i alreay sorted it out just looking for a reason from people who know more about these things and maybe a discussion…