ufw/iptables and other firewalls can also throttle repeated connection attempts, which is almost always fine but could be something you don't want if you have a legitmate need to support many rapid ssh connections from the same source (CM tools, maybe?)
> if you have a legitmate need to support many rapid ssh connections from the same source (CM tools, maybe?)
If you're doing that, I strongly suggest using ControlMaster to reuse the connections; it makes security tools like this less grumpy, but it's also a nice performance win.
