nanog mailing list archives
Re: IP reputation lookup (prefix not single IP)
From: Eric Kuhnke <eric.kuhnke () gmail com>
Date: Thu, 25 Mar 2021 20:43:49 -0700
Nothing more than anecdotal evidence, when I last looked into the externally available network details on a number of low-budget VPS hosting companies... I would say that if anything, a person who really knows what they're doing operating a properly MX, will face more difficulties today than they did 3, 5 or 7 years ago operating the system in the same netblocks as IPs which have been previously abused. For obvious reasons the IP reputation systems and antispam tools at the biggest destinations (gsuite/gmail, office365, etc) are treated as closely guarded proprietary data. My personal theory on a whole /24 acquiring a poor reputation, is that it does have some correlation with the density of random $5/mo VPS customers and the turnover of different customers between the same small group of IPs. And exactly how many misconfigured smtp sources have existed in that block within some previous range of time, how much spam has been reported/flagged, etc. On Thu, Mar 25, 2021 at 8:28 PM Randy Bush <randy () psg com> wrote:
I think you will find that most SMTP / anti-spam focused RBL tools give a very similar result for IP reputation on a per /24 block basisgot cites? this got me curious the other day. randy --- randy () psg com `gpg --locate-external-keys --auto-key-locate wkd randy () psg com` signatures are back, thanks to dmarc header butchery
Current thread:
- IP reputation lookup (prefix not single IP) vom513 (Mar 25)
- Re: IP reputation lookup (prefix not single IP) Alex Wacker (Mar 25)
- Re: IP reputation lookup (prefix not single IP) Brendan Carlson (Mar 25)
- Re: IP reputation lookup (prefix not single IP) Elvis Daniel Velea (Mar 25)
- Re: IP reputation lookup (prefix not single IP) Brendan Carlson (Mar 25)
- Re: IP reputation lookup (prefix not single IP) Eric Kuhnke (Mar 25)
- Re: IP reputation lookup (prefix not single IP) Randy Bush (Mar 25)
- Re: IP reputation lookup (prefix not single IP) Eric Kuhnke (Mar 25)
- Re: IP reputation lookup (prefix not single IP) Elvis Daniel Velea (Mar 26)
- Re: IP reputation lookup (prefix not single IP) John Levine (Mar 26)
- Re: IP reputation lookup (prefix not single IP) Sabri Berisha (Mar 26)
- Re: IP reputation lookup (prefix not single IP) John R. Levine (Mar 27)
- Re: IP reputation lookup (prefix not single IP) Randy Bush (Mar 25)
- Re: IP reputation lookup (prefix not single IP) Alex Wacker (Mar 25)