Finding host to block spammer's IP

Hi. I have been using the block IP feature in AG for the last few months to stop the continual flood of spam and my list of blocked IPs must have well over 50 entries in it by now.

However, there is this one I keep getting lately and for some reason when I ping to get the IP the ping request cannot find the host and tells me to check the name and try again.

Here is what shows up as the host in my AG:

trofimenkoaa.sovam.net.ua

Any ideas of how I can block this pest?

Thanks!

83.170.232.220 he is doing many guestbooks not just yours. I wrote a mod on making the guestbook just store IP's and not hostnames. It's in the thread that says READ THIS ...

Hi,
I got a problem with my advanced guestbook 2.3.1:
A bunch of spammers wrote in my guestbook (about 10 entrys a day) so I installed the Image Verification. After that I had one week of no spam but now the spammers got back.

But this time its a different Host. His first entry was:

Fri, November 4, 2005 23:35 Host: telweb.t-online.de
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Just thought I would pop in again - love your site - you've done a WONDERFUL job - will be back often. I have put you in my links - hope you don't mind.
URL: http://weekendspabreak.scanboek.nl/article127.html

He makes about 5 entrys a day in my guestbook
Does anybody now how to block this host? Its the same one all the time: telweb.t-online.de
Thanks
Felix
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I just found a backup copy of my guestbook where the image verification wasn't installed yet. Hope he entered the spam over that site (even if theres no link to that site). If there is any spam now coming up I really don't know what to do or how to block this host

Sounds like you have thae same mistake I had. I had a backup copy of the guestbook installed without spam protection and the spammers found it. Took me a week to figure that out.