We were 'Probed'

[illithid]

I have to agree with Snakes in regards to banning all the IP addresses used during that "Probe". The reason I say that is because, at first glance, it looks to me like a "brute force attack". A method of hacking to crack passwords, etc. Generally this only occurs at the login script, but can occur at other areas of page. Perhaps they are trying to exploit a weakness somewhere. Hard to say though.

Definitely ban those IP's.