rachel123 - 9:26 pm on Feb 28, 2011 (gmt 0)

PS, if you are using any sort of software (php) on this server, make sure it is thoroughly patched and up to date.

Short of having a password that is "password", or a back door, or a host with no firewall or security to speak of, you may be running a version of some software that has a known vulnerability.