August 2009
1 post
Installing APF and BFD on a Rackspace Cloud Server
Don’t look now, but people have been trying to break into your server. Don’t believe me? Okay, look now. Type this command (as root) in your shell: grep "Invalid user" /var/log/secure | wc -l The number you see is the number of times someone has tried to log into your server via ssh with an invalid username. Some of them might be you, but most of them are not. Most of them are people...