Anti Spam related tutorial/FAQ

BSD PF Firewall Block FTP Bruteforce Attacks

last updated August 13, 2009 in Anti Spam, FreeBSD, Networking, OpenBSD, PF Firewall, Security, UNIX

I see lots of failed FTP login attempts in my log file. How do I stop FTP bruteforce attack? What should I do to solve this problem under FreeBSD 7.x server operating systems?

PHP Add Captcha Protection To Web Forms

last updated September 22, 2009 in Anti Spam, Apache, CentOS, Debian / Ubuntu, Fedora Linux, FreeBSD, Linux, PHP, Programming, RedHat and Friends, Security, Windows

I own a small business website. However, bots started to abusing my forms such as contact.php. How do I stop bots bots from abusing my site? How do I tell if PHP form is submitted by a person or a script?

nixCraft

nixCraft

Anti Spam

PHP Add Captcha Protection To Web Forms