bruteforce attack

I noticed today some brute force attacks on my server.. hmm interesting..
too bad I can't work on it full time so I did a quick add to the iptables firewall to drop all packets from that network. hehehe I hope we dun have users from italy and china then.

Jun 21 00:40:07 myserver sshd[20491]: Did not receive identification string from ::ffff:89.96.48.225
Jun 21 00:40:07 myserver sshd[20492]: Did not receive identification string from ::ffff:89.96.48.225
Jun 21 00:42:17 myserver sshd[20494]: Invalid user test from ::ffff:89.96.48.225
Jun 21 00:42:17 myserver sshd[20495]: Invalid user test from ::ffff:89.96.48.225
Jun 21 00:42:20 myserver sshd[20494]: Failed password for invalid user test from ::ffff:89.96.48.225 port 35343 ssh2
Jun 21 04:42:20 myserver sshd[20496]: Failed password for invalid user test from ::ffff:89.96.48.225 port 35343 ssh2
Jun 21 00:42:20 myserver sshd[20495]: Failed password for invalid user test from ::ffff:89.96.48.225 port 35345 ssh2
Jun 21 04:42:20 myserver sshd[20497]: Failed password for invalid user test from ::ffff:89.96.48.225 port 35345 ssh2
Jun 21 04:42:20 myserver sshd[20496]: Received disconnect from ::ffff:89.96.48.225: 11: Bye Bye
Jun 21 04:42:20 myserver sshd[20497]: Received disconnect from ::ffff:89.96.48.225: 11: Bye Bye
Jun 21 00:42:23 myserver sshd[20498]: Invalid user test from ::ffff:89.96.48.225
Jun 21 00:42:23 myserver sshd[20499]: Invalid user test from ::ffff:89.96.48.225
Jun 21 00:42:25 myserver sshd[20498]: Failed password for invalid user test from ::ffff:89.96.48.225 port 35426 ssh2
Jun 21 04:42:25 myserver sshd[20500]: Failed password for invalid user test from ::ffff:89.96.48.225 port 35426 ssh2
Jun 21 00:42:25 myserver sshd[20499]: Failed password for invalid user test from ::ffff:89.96.48.225 port 35427 ssh2
Jun 21 04:42:25 myserver sshd[20501]: Failed password for invalid user test from ::ffff:89.96.48.225 port 35427 ssh2