Multiply times the number of databases you want to use, times the number of
times you would need to download them each day to stay current, times the
number of people that want to download the files--have you got a spare OC-3
laying around...?

Bill
----- Original Message ----- 
From: "Markus Gufler" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Friday, September 26, 2003 11:52 AM
Subject: RE: [Declude.JunkMail] Attacks prompt shutdown of antispam lists


> > DNS blacklist databases are very much larger than the Sniffer
> > rule set files.
>
> A textfile containing only IP-Addresses can by zipped down to around 1/3
> of his size.
> A file containing 200 Ips has an original size of 3,1 kB
> The zipped file has 1,1 kB
> (Probably the zip algoritmus will work bether for larger files because
> there are more equal 3-digit-strings.)
>
> Multiplicating it by 100.000 assuming a blacklist containing 20 million
> "bad" IPs would create a 110 MB file.
>
> But this 20 million IP's are a initial value. I have no exact idea but I
> assume there should be something between 1000 and 10000 new/removed IPs
> per day.
>
> If my theory has no errors we can expect daily updates between 0,5 and
> 5,5 MB.
> That shouldn't be a problem.
>
> Markus
>
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