One day I'll find that peer guy and then I will reset his connection

THREE DAYS of debugging, reading all the logs I could find, creating tens of new logs in our appliaction, and SUDDENLY an email from your IT admin:

"Hey your CURL requests are being rejected by my !oh so secure! firewall rule".

Not that I haven't said at the beggining, that THIS IS YOUR F...G NETWORK PROBLEM because we get "connection reset by peer" errors, and you ASSURED that everything is CHECKED and OK!

What are the symptoms of a broken openssh server?

I completely lost access with connection reset by peer, however, earlier today I kept having my session auto disconnect on only one server, the only way I could gain access is to remove and then install openssh again

But on this particular server, I have not even changed ssh port, why did it get broken?