6 messages in net.sourceforge.lists.courier-users[courier-users] Re: Esmtp ddos vulner...
FromSent OnAttachments
Stephen S. KelleyJan 3, 2003 8:41 am 
Sam VarshavchikJan 3, 2003 2:56 pm 
Stephen S. KelleyJan 3, 2003 5:13 pm 
Sam VarshavchikJan 3, 2003 7:57 pm 
William Dell WisnerJan 4, 2003 12:58 am 
Sam VarshavchikJan 4, 2003 8:34 am 
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Subject:[courier-users] Re: Esmtp ddos vulnerability in 0.40.0.20021026?Actions...
From:Sam Varshavchik (mrs@courier-mta.com)
Date:Jan 4, 2003 8:34:44 am
List:net.sourceforge.lists.courier-users

William Dell Wisner writes:

There's no reason to accept more than four concurrent ESMTP connections from the same IP address. Reduce MAXPERC to 10, and MAXPERIP to 4.

Oh, yes there is. It's called NAT.

The problem is particularly acute if you've got people reading their

This is not reading mail. This is sending mail..