Antispam

Use Hardware Firewall to Block Spam

As I started to use dedicated hosting for my sites - I realized for sure that hardware firewall is the ultimate solution to prevent comment/referral/trackback spam. I'll try to demonstrate how easy it is to ban thousands of spammy IPs with the help of hardware firewall (I use Cisco PIX Firewall) [ ... ]

posted @ Tuesday, March 27, 2007 7:10 PM | Your thoughts

Blog Spam: NewsGator Hacked ? (Bug in Spam Software)

Seems like some spam software checked for keywords in the content of the site to find out what blogging software is used in order to use the right protocol posting. Seems like newsgator's subscribe button caused this - spam software mistakenly supposed that subedit blogging tool used. As soon as I removed newsgator's subscribe button [ ... ]

posted @ Saturday, January 6, 2007 5:29 AM | Your thoughts

Antispam: WebaltBot = Dirty Spammer

Something called Webaltbot is a blog spam robot that is able to POST via random IPs. GET requests come from the single original IP, so this way I was able to spot him [ ... ]

posted @ Tuesday, December 26, 2006 9:21 PM | Your thoughts

Thoughts on Comment Spam

Discussion of various antispam solutions and tactics, their advantages and disadvantages including comment moderation, closing comments on older posts, content filtering, rel-nofollow and CAPTCHA which proved to be the most effective [ ... ]

posted @ Saturday, December 16, 2006 6:26 PM | Your thoughts

Human Comment Spammers (Distraught Visitors)

My blog is rather protected in terms of comment and referral spam. But today I had one of those distraught visitors on my blog. Fighting CAPTCHA he succeeded to post approximately 50 comments in 2 hours simply copy-pasting [ ... ]

posted @ Monday, November 20, 2006 10:46 PM | Your thoughts

Anti Trackback Spam Patch

Following Referral Spam Patch implemented here 2 months ago, I patched the weblog engine today against the trackback spammers [ ... ]

posted @ Monday, June 13, 2005 2:22 PM | Your thoughts

Anti Referral Spam Patch

I still get each day about 100 referrer spam records in the database. Usually I delete them and have already created T-SQL script, that does the work. There are not so many anti-referrer spam solutions for .Text based engines. Almost all of them use instead of trigger. Instead, my solution uses 2 simple patches to stored procedures [ ... ]

posted @ Saturday, March 26, 2005 2:29 AM | Your thoughts

x2line Antispam Updates - Implementing nofollow

Implementing nofollow on this site. Google is planning to develop nofollow feature towards something big and conceptual, we are just at the beginning of some process, so I don't want to be left behind. Time passed - nofollow support was removed from this site [ ... ]

posted @ Friday, January 21, 2005 1:05 AM | Your thoughts

Starting to Fight Comment Spammers. Initial Black List

Some initial experience blocking comment spam with CAPTCHA. I compiled an initial comment spam urls black list [ ... ]

posted @ Saturday, December 25, 2004 6:42 PM | Your thoughts

Dealing with Referral Spam

Comment spam is dead at least here on this site. Thanks to CAPTCHA control for ASP.NET. I have a bunch of spam referrals each day though [ ... ]

posted @ Saturday, December 11, 2004 11:01 PM | Your thoughts

Improvement to HIP CAPTCHA control for Blog Engines

This is a small improvement to HIP CAPTCHA control for blog engines based ASP.NET. It also demonstrates how to use HtmlTextWriter to render well-formatted HTML [ ... ]

posted @ Saturday, November 27, 2004 5:32 AM | Your thoughts

Fighting Comment Spam with CAPTCHA

This weblog was experiencing lots of comment spam lately. So I've added comment verification image to the comment page. It is supposed to fight it back [ ... ]

posted @ Thursday, November 25, 2004 11:43 PM | Your thoughts