http://retrohack.com/how-to-prevent-directory-harvest-attacks/ lest the tubes become overfull Tue, 15 May 2012 22:46:35 +0000 hourly 1 http://wordpress.org/?v= http://retrohack.com/how-to-prevent-directory-harvest-attacks/comment-page-1/#comment-1012 Using SMTP tarpits to slow down directory harvest attacks Thu, 07 Oct 2010 13:25:12 +0000 http://retrohack.com/how-to-prevent-directory-harvest-attacks/#comment-1012 [...] Directory harvest attacks are just one of the many methods that spammers use to create lists of valid email addresses. As an email administrator, you want to understand both what they are, and how to effectively defend against them. Here is how these attacks work. The spammer creates a list of possible email addresses by combining common email aliases and names with the authoritative domain(s) hosted by the server. The script then attempts to “deliver” mail to the addresses on this list using the RCPT TO: command, and using the responsed from the mail server to determine which are good and which are not. Valid addresses are added to a final list for sending spam that can be shared or even sold to other spammers, while invalid ones are dropped. [...] [...] Directory harvest attacks are just one of the many methods that spammers use to create lists of valid email addresses. As an email administrator, you want to understand both what they are, and how to effectively defend against them. Here is how these attacks work. The spammer creates a list of possible email addresses by combining common email aliases and names with the authoritative domain(s) hosted by the server. The script then attempts to “deliver” mail to the addresses on this list using the RCPT TO: command, and using the responsed from the mail server to determine which are good and which are not. Valid addresses are added to a final list for sending spam that can be shared or even sold to other spammers, while invalid ones are dropped. [...]

]]> http://retrohack.com/how-to-prevent-directory-harvest-attacks/comment-page-1/#comment-726 Abhilasha Enterprise Sat, 17 Jul 2010 09:07:43 +0000 http://retrohack.com/how-to-prevent-directory-harvest-attacks/#comment-726 <span class="topsy_trackback_comment"><span class="topsy_twitter_username"><span class="topsy_trackback_content">RT @GFISoftware: http://retrohack.com/how-to-prevent-directory-harvest-attacks/ - How to Prevent Directory Harvest Attacks</span></span> RT @GFISoftware: http://retrohack.com/how-to-prevent-directory-harvest-attacks/ – How to Prevent Directory Harvest Attacks

]]> http://retrohack.com/how-to-prevent-directory-harvest-attacks/comment-page-1/#comment-717 Tech Data Software Fri, 16 Jul 2010 17:48:41 +0000 http://retrohack.com/how-to-prevent-directory-harvest-attacks/#comment-717 <span class="topsy_trackback_comment"><span class="topsy_twitter_username"><span class="topsy_trackback_content">RT @GFISoftware: http://retrohack.com/how-to-prevent-directory-harvest-attacks/ - How to Prevent Directory Harvest Attacks</span></span> RT @GFISoftware: http://retrohack.com/how-to-prevent-directory-harvest-attacks/ – How to Prevent Directory Harvest Attacks

]]> http://retrohack.com/how-to-prevent-directory-harvest-attacks/comment-page-1/#comment-1621 techdatasoftwre Fri, 16 Jul 2010 17:48:41 +0000 http://retrohack.com/how-to-prevent-directory-harvest-attacks/#comment-1621 <span class="topsy_trackback_comment"><span class="topsy_twitter_username"><span class="topsy_trackback_content">RT @GFISoftware: http://retrohack.com/how-to-prevent-directory-harvest-attacks/ - How to Prevent Directory Harvest Attacks</span></span> RT @GFISoftware: http://retrohack.com/how-to-prevent-directory-harvest-attacks/ – How to Prevent Directory Harvest Attacks

]]> http://retrohack.com/how-to-prevent-directory-harvest-attacks/comment-page-1/#comment-718 GFI Software Fri, 16 Jul 2010 17:46:36 +0000 http://retrohack.com/how-to-prevent-directory-harvest-attacks/#comment-718 <span class="topsy_trackback_comment"><span class="topsy_twitter_username"><span class="topsy_trackback_content">http://retrohack.com/how-to-prevent-directory-harvest-attacks/ - How to Prevent Directory Harvest Attacks</span></span> http://retrohack.com/how-to-prevent-directory-harvest-attacks/ – How to Prevent Directory Harvest Attacks

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