nanog mailing list archives
RE: Stealth Blocking
From: <jlewis () lewis org>
Date: Wed, 23 May 2001 23:10:58 -0400 (EDT)
On Wed, 23 May 2001, Roeland Meyer wrote:
I hate to be pendantic here, but from your own email and what other sources have told me, this is inaccurate. MAPS does NOT do pre-emptive open-relay testing. I consider this to be a very important distinction. If I thought this was the case, I would stop using MAPS five minutes ago.
What's so bad about pre-emptive open-relay scanning? What's the difference between an open-relay found/used by a spammer and added to the RSS and an open-relay found by pre-emptive scanner and added to the RSS? Both sites are likely sources of relay spam. I recently upgraded a busy set of mail servers from using only the DUL to the DUL/RBL/RSS, and the number of messages being rejected/day has gone up about 20x. I still get relay spam and report a handful of open relays to MAPS every day. If there were a list like ORBS run more the way MAPS is run, I'd probably give that a try too. The only complaint I have about MAPS is that recently someone has been making some SWAGs regarding what blocks of our IP space are dial-ups and whoever oversees the DUL has added blocks of non-dial-ups apparently blindly, causing trouble for our customers and support calls to our NOC. -- ---------------------------------------------------------------------- Jon Lewis *jlewis () lewis org*| I route System Administrator | therefore you are Atlantic Net | _________ http://www.lewis.org/~jlewis/pgp for PGP public key_________
Current thread:
- Re: Why are you all still here? (Was Re: Stealth Blocking), (continued)
- Re: Why are you all still here? (Was Re: Stealth Blocking) Mitch Halmu (May 24)
- finding POPs Miles Fidelman (May 23)
- Re: Stealth Blocking Shawn McMahon (May 23)
- Re: Stealth Blocking Adam Rothschild (May 23)
- RE: Stealth Blocking Roeland Meyer (May 23)
- RE: Stealth Blocking David Schwartz (May 23)
- Re: Stealth Blocking Valdis . Kletnieks (May 24)
- Re: Stealth Blocking J.D. Falk (May 23)
- RE: Stealth Blocking David Schwartz (May 23)
- RE: Stealth Blocking Roeland Meyer (May 23)
- RE: Stealth Blocking David Schwartz (May 23)
- RE: Stealth Blocking jlewis (May 23)
- RE: Stealth Blocking David Schwartz (May 24)
- Scanning (was Re: Stealth Blocking) William Allen Simpson (May 24)
- Re: Scanning (was Re: Stealth Blocking) Joseph T. Klein (May 24)
- Re: Scanning (was Re: Stealth Blocking) Paul Vixie (May 24)
- Re: Scanning (was Re: Stealth Blocking) Mitch Halmu (May 24)
- Re: Scanning (was Re: Stealth Blocking) Greg A. Woods (May 24)
- Re: Scanning (was Re: Stealth Blocking) Christopher A. Woodfield (May 26)
- Re: Scanning (was Re: Stealth Blocking) Greg A. Woods (May 26)
- Re: Scanning (was Re: Stealth Blocking) William Allen Simpson (May 26)
- Re: Scanning (was Re: Stealth Blocking) William Allen Simpson (May 26)