I had (last week) problems with my home network configuration from the DSL ISP and the reverse name of my ip was incorrec.
For that reason my virtualmin server blocked me out of IMAP.
Using another internet connection (like my phones shared wifi) i can connect to the server with the same computer
So the virtualmin server somehow blocks my DSL ip while connecting to my servers IMAP (dovecot)
I have tried shutting down firewalld and fail2ban temporarily and still can’t connect
if i shut down the dovecot also, and use
#nc -l -p 993
to listen on the port, i can connect using telnet to the port from my home computer, so everything should work @ my home.
I also have another server that also uses port 993 for imap and i can connect to that server well.
So how can i dig what is blocking my connection?
i can connect using virtualmin (port 10000) and ssh and ftp, all other works well from my DSL IP but IMAP port 993 not…
release 8.2.2004 (Core)