nanog mailing list archives

Re: IP reputation lookup (prefix not single IP)


From: "John R. Levine" <johnl () iecc com>
Date: 27 Mar 2021 10:55:01 -0400

Same here. I have not publicised or updated my korea.services.net DNSBL for over a decade and it's still getting over 100 qps.

On Fri, 26 Mar 2021, Sabri Berisha wrote:

----- On Mar 26, 2021, at 8:20 PM, John Levine johnl () iecc com wrote:

Hi,

Also keep in mind that "most blocklists" is meaningless. Any moron can
run a blocklist, and many morons do. The vast majority of blockists
are used by close to nobody, and only a handful are widely enough used
to matter.

This moron ran a per-country/per-as blocklist in the early 2000s which
was based on a DFZ BGP feed. I closed it off more than 10 years ago.

I just checked and I'm still receiving ~5 queries per second.

As per my anecdotal evidence, there are some really clueless operators
out there as well. There is, of course, the temptation to just add
a wildcard A record... But nah, I don't like hot places.

The other side-effect is that spammers are still very eager to use my
domain in their from: headers, judging by the amount of undeliverables
I receive (in waves).

That's generally because they pick the To and From addresses in the spam from the same dusty spam lists.

Regards,
John Levine, johnl () taugh com, Primary Perpetrator of "The Internet for Dummies",
Please consider the environment before reading this e-mail. https://jl.ly


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