The war on comment-spam has now begun. It appears that Blogger might have some anti-spam measures of which I was unaware. Otherwise it’s a strange coincidence that I get a huge number of comment spams for extremely hard-core porn from the Ukraine so soon after starting a WordPress blog.
About 24 hours before the spam attack there was a strange blog comment that linked to google (with no offensive or spammy content). It appears that leaving it online was my mistake, when I left that online for a day the spammer decided that I might also leave porn spam online. I arrived home this evening to find almost 100 spams in the form of comments and track-backs, and more arriving by the minute. So I used iptables to block a /20 related to the spam and things are quiet now.
The moral of the story is to delete anything unusual ASAP in case it encourages the idiots.
I’ve also tightened the anti-spam measures on my blog too.
From now on any short comment that does not add significant meaning will not be accepted on my blog. To the person who submitted many dozens of comments with variants of “nice site” with the idea that the URL listed for the comment author will be visited by readers of my site – nice try. If you genuinely want to send me a message saying “nice blog” then email will work.
In the future I may remove the display of URLs for the comment authors entirely.
Several comments suggested using Akismet to block comment spam. Akismet is free for non-commercial use and charges for commercial use (a suggested threshold being $500 per month in blog revenue).
For the moment I am going to moderate all comments, the number of genuine comments is quite small and this is no great effort for me. I check the moderation list at least twice a day so there shouldn’t be an excessive delay either.