Bot nets likely behind jump in spam

Bot nets likely behind jump in spam
Robert Lemos, SecurityFocus 2006-10-27

A significant rise in the global volume of spam in the past two months has security analysts worried that bot nets are increasingly being used by spammers to stymie network defenses erected to curtail bulk e-mail.

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Bot nets likely behind jump in spam 2006-11-01
Anonymous (1 replies)

Re: Bot nets likely behind jump in spam 2006-11-03
Anonymous

Bot nets likely behind jump in spam 2006-11-01
Anonymous

Bot nets likely behind jump in spam 2006-11-03
Doug Myhre (1 replies)

I've been collecting statistics from our mail server spam filter. I noticed the jump also, more than one. Saw a jump around 9/18/2006, another around 10/3/2006. Our server currently receives about 60000 messages per day. Of that about 11000 are valid, about 32000 are quarantined as spam (the rest are either invalid addresses, rejected mail, or spam which got through). The 32000 messages quarantined come from over 22000 hosts. .3-.5% of the hosts send out 10 or more messages, 5% send out 3-9 messages, ~94.5% send out only 1-2 spam(s). That's about 21000 hosts only sending 1-2 messages just to our server, and they come from all across the IP address range. The IP's which send out more changes from day to day.

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Link to this comment: http://www.securityfocus.com/comments/articles/11420/34168#34168

Re: Bot nets likely behind jump in spam 2006-12-18
Anonymous