Hi, I have a form on my web site that allows visitors to send me comments etc. I keep getting what looks to me like spam sent via this form and it look like .... [ URL=http://lalalalal.xxxusususjs.info/ ]lalalalala <end url tag> I have edited the url. What is this? How can i stop it?
Yes, it is spam link. They try to get free backlinks with this kind of stuff. Simple captcha still working for me, I got 10 - 30 attack like this everyday, but it seems they still can not bypass the captcha. There are several others method to fight this. You can find nice reading here : http://www.arraystudio.com/as-workshop/the-captcha-alternatives.html Also this one is quite interesting : http://www.gigoit.org/humanauth/ Hope that helps
These kind of attacks are common. The best thing to do is constantly monitor the logs and if you see an IP pattern, ban it.