nanog mailing list archives
Re: Repeated Blacklisting / IP reputation
From: Jon Lewis <jlewis () lewis org>
Date: Tue, 8 Sep 2009 15:08:38 -0400 (EDT)
On Tue, 8 Sep 2009, Wayne E. Bouchard wrote:
This is not actually a new problem. ISPs have been fighting this for some time. When a dud customer spams from a given IP range and gets it placed in various RBLs, when that customer is booted or otherwise removed, that block will probably get reissued. The new customer then calls up and says, "my email isn't getting through." All it takes is a
The difference/issue here is that it's easy for you when turning down or turning up a customer to check the IP space being revoked/assigned in the various popular public DNSBLs, sparing your customers the headache of being assigned blacklisted IPs. Until your next customer starts using the space and can't send us email, you have no way of knowing that we null routed the subnet on our MX cluster.
---------------------------------------------------------------------- Jon Lewis | I route Senior Network Engineer | therefore you are Atlantic Net | _________ http://www.lewis.org/~jlewis/pgp for PGP public key_________
Current thread:
- Re: Repeated Blacklisting / IP reputation, (continued)
- Re: Repeated Blacklisting / IP reputation Peter Beckman (Sep 10)
- Re: Repeated Blacklisting / IP reputation Joel Jaeggli (Sep 11)
- Re: Repeated Blacklisting / IP reputation Joe Greco (Sep 10)
- Re: Repeated Blacklisting / IP reputation Joel Jaeggli (Sep 11)
- Re: Repeated Blacklisting / IP reputation Leo Vegoda (Sep 10)
- Re: Repeated Blacklisting / IP reputation Christopher Morrow (Sep 13)
- Message not available
- Re: Repeated Blacklisting / IP reputation Tim Chown (Sep 14)
- Re: Repeated Blacklisting / IP reputation Valdis . Kletnieks (Sep 10)
- Re: Repeated Blacklisting / IP reputation Christopher Morrow (Sep 13)
- Re: Repeated Blacklisting / IP reputation Wayne E. Bouchard (Sep 08)
- Re: Repeated Blacklisting / IP reputation Jon Lewis (Sep 08)
- Re: Repeated Blacklisting / IP reputation Justin Shore (Sep 08)
- Re: Repeated Blacklisting / IP reputation Rich Kulawiec (Sep 14)
- Re: Hijacked Blocks (was: Repeated Blacklisting / IP reputation) John Curran (Sep 14)
- Re: Hijacked Blocks (was: Repeated Blacklisting / IP reputation) Christopher Morrow (Sep 14)
- Re: Hijacked Blocks Chris Marlatt (Sep 14)
- Re: Hijacked Blocks Christopher Morrow (Sep 14)
- RE: Hijacked Blocks Azinger, Marla (Sep 14)
- RE: Hijacked Blocks Azinger, Marla (Sep 14)
- RE: Repeated Blacklisting / IP reputation, replaced by registered use Michiel Klaver (Sep 15)
- Re: Hijacked Blocks Randy Bush (Sep 14)