How can I effectively (so do it fast when talking about firewall level and can do it with many-many IP's) block an IP address for a given time, ex.: a month if it tried to contact port 22 TCP in any manner, so port check, connect via
How can I do it with
The main idea is that SSHD is running on a non-default port and with this blocking method, we could harden our protection without any extra software.
It should block the IP with
UPDATE: I mean it should do it automatically. I don't want to give every IP address manually.