> My favorite is to implement a tarpit while moving the ssh port.

For those who, like me, are unfamiliar with the concept of a SSH tarpit, it's a technique consisting of inserting delays into SSH connection attempts.

Old HN discussion on Endlessh:

https://news.ycombinator.com/item?id=24491453

Isn’t this easily detectable for any malicious script? Just a small timeout and try the next port.

Does that mean that you automatically block IPs that try to login on port 22 (since they are obviously malicious/port scannners)? If yes, is there any specialized daemon for that or are you using firewall rules? Or are you running a SSH honeypot on port 22?

The post is referring to this: https://github.com/skeeto/endlessh

I'm guessing that the person you replied to is referring to the same.

A tarpit is a technique to waste your opponents time and network sockets. Usually by accepting the connection but only sending or receiving data at like 1byte/s.