To fight with Dictionary Attack ConfigServer Services has developed a good solution.

They have developed a dictionary attack ACL for the Exim mail server — with this not only the ongoing Dictionary attack is stoped but it also prevents further attempts by blocking spammer ip address. (The ACL has two main functions – the detection and the block.)

If you find emails like — anything@domainname.com [where anything == john , mark , chris almost any dictionary word..] that means you server is under dictionary attack.

You can find here the instructions for downloading and installing Dictionary Attack ACL

ThinkSupport has used this ACL on many exim servers and have found it as effective solution to stop Dictionary Attack.

This entry was posted on Wednesday, May 9th, 2007 at 9:58 am and is filed under Articles -- Webhosting, Direct Admin, WHM/cPanel. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.