Re: [SLE] [OT} blacklisting dynamic dial-up addresses
VEl Mar 25 Ene 2005 07:19, Örn Einar Hansen escribió:
Ah ... that's probably the kind of ISP, who "truly" believes that all those spammers and hackers are 2 year old kids, that just got a new C= 64 for christmas, (rest of nonsense stripped).
It's well known that one strategy of spammers has been to relay their mass mailings through unsecured mail servers set up by unsuspecting and incompetent private users on a dynamic IP. IP blocks of ISP have been blacklisted for spam reporting due to this fact. And yes, whole subnets have been known to be blacklisted. That is, address ranges used for dial-up and ADSL users who are assigned an IP dynamically at connection. I don't defend the practice of ISP to block port 25, but I do believe that there has been harm done by faulty mail server setup, especially unauthenticated SMTP relay. This has nothing to to with script kiddies, two years olds or other nonsense.
I hardly believe anyone blocks the "block", since the "block" in question might be a class A network, which would in fact, perhaps block a large portion of the internet. That blacklister would probably fit in the category of "retard", imnsho. And many ISP's have "outside" IP's for the mail exchangers, which is nowhere related to the class network you get your dynamic IP from.
Whatever. Experience contradicts your beliefs. -- Andreas Philipp Noema Ltda. Bogotá, D.C. - Colombia http://www.noemasol.com
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Andreas Philipp