I don't think I have seen a question like this posted here so here goes. I check my log files occasionally and in authentication log there are usually quite a few 'failed password for invalid user' or 'failed password for root' entries. Same IP, different port, ssh2. I made a change to my etc/ssh/sshd_config file some time ago changing the entry Permit Root Login from yes to no. I checked the log file an hour ago and still see many entries like this. I guess they are more annoying than actually dangerous. So, I added the following line to that file, recommended from a Google search.
I don't know yet what effect that new line will have.
Just wondering if I should spend more time with this and maybe get into IP tables or other, or is this really commonplace and just an annoyance.
i5 3570k, ASRock z77 Extreme 4, 8 Gb Ripjaws 1600, Antec 430w psu, HVR 1600 tv tuner, custom case- marble top, oak face. Carver & DCM Time Window sound system. Mint 14 KDE.