Re: [IMail Forum] Dictionary attacks

[Joe Wolf]

No you're not clueless and you've actually hit the nail on the head.  It 
takes MUCH less processing overhead for Imail to give a 550 reply than it 
does to run Black Ice.  It's hard to estimate, but I believe Imail could 
give out 3 - 400 550 errors in the time it takes Black Ice to block a single 
IP.

If you're running a heavy load on an Imail box you're much better off 
without Black Ice.  I've tried it both ways and Black Ice is very slow and 
processor intensive compared to Imail.

-Joe
----- Original Message ----- 
From: "Dan Barker" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Wednesday, November 24, 2004 4:18 PM
Subject: RE: [IMail Forum] Dictionary attacks


I must be clueless (or my server has never been the target of a Dictionary
attack). How much processing overhead does IMail go through to give a 550
Invalid User reply? It shouldn't even get to the data exchange. Seems it
would not be very resource intensive. Of course, I'm running under 500
users, and they are in the IMail database. Maybe you are seeing database
latencies? But that should affect the front end processor too.
I must be missing something.
Dan
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Christopher
Checca
Sent: Wednesday, November 24, 2004 12:24 PM
To: [EMAIL PROTECTED]
Subject: RE: [IMail Forum] Dictionary attacks
I have to agree with Len ... IMGate doesn't even show any signs of slowing
during dictionary attacks, and saved my IMail server from bogging down.
I'm running IMGate on a 400 MHz 396Mb RAM machine with one ATA66 hard 
drive.

Christopher Checca
Packard Transport, Inc.
IT Department
24021 South Municipal Dr
PO Box 380
Channahon, IL.  60410
815 467 9260
815 467 6939 Fax
[EMAIL PROTECTED]
www.packardtransport.com


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