Well I finally got around to removing all the spam off my old websites, and I've disabled all the commenting. Awesome.
I also had some old contact forms that I was getting spam from too. These now have links to my main contact form.
My contact form also got a bit of an update, it now has akismet support.
I've noticed that the web server has been running slowly today.
Anyway I think I've found the problem. One of my old blogs sites is currently being spammed. Currently there are 3.3 million comments in the database!
EDIT: Problem fixed:
mysql> delete from comments WHERE id > 556;
Query OK, 3305122 rows affected (2 min 21.45 sec)
EDIT2: The spam has been coming from caravan.ru a Russian ISP (who's logo is very similar to optus' old one...).
I think I've found the cause for Akismet not working as well as it should have.
The class I was using had a low timeout value; I've since increased this to 10 seconds, inline with the new Wordpress 2 plugin.
So hopefully that will improve the amount of spam being caught.
Argh. Too much spam is getting through again; even with Akismet. So I'm in the process of writing a new spam class. The aim is to build a comment score (similar to email spam filtering programs) based on the following:
So hopefully I can cut down the spam.
I found the following address in my logs. Looks like a spamming program. Feel free to try and take it offline.
EDIT: I've changed the message so it spams it own site, hopefully taking itself offline. The stop command didn't seem to work, so this is the next best thing.
EDIT2: Looks like the owner has password protected the area.
Far too much spam on this site, I'm getting about 100 a day blocked by akismet, although a few are still getting through.
Anyway I've upped the spam level to maximum, meaning that anything detected as spam is not accepted (no comment moderation).
I do need to improve this still.