nanog mailing list archives

Re: Increasing problems with geolocation/IPv4 access


From: Owen DeLong via NANOG <nanog () nanog org>
Date: Fri, 20 Jan 2023 17:02:34 -0800

I will repeat what I have been saying since the first discussions of the concept of ip geo-location some decades ago…

An IP address is not tied to any of the following:
        Location
        Person

An IP address may be transiently tied to a host. The definition of transient in this case can vary widely from a few 
seconds to multiple years.
IP Addresses may be tied to an organization (though this is also usually some level of transient).

Trying to pretend otherwise in any useful way is fraught.

Unfortunately, it is not fraught enough. It works well enough often enough that the times it doesn’t work usually don’t 
impact the people monetizing it.

Owen


On Jan 20, 2023, at 16:48, Mike Lyon <mike.lyon () gmail com> wrote:

I’ve come to the conclusion that the geo-ip feed companies don’t give a damn about the legitimacy of their 
information and don’t research any of it. They just wait for the end user to complain to make the change.

Had one today, in fact.

They’re lame.

-Mike



On Jan 20, 2023, at 16:33, Jared Mauch <jared () puck nether net> wrote:

I’ve been seeing an increasing problem with IP space not having the ability to be used due to the behaviors of 
either geolocation or worse, people blocking IP space after it’s been in-use for a period of time.

Before I go back to someone at ARIN and say “your shiny unused 4.10 IP space” is non-functional and am at a place 
where I need to start/restart/respawn the timer, I have a few questions for people:

1) Do you see 23.138.114.0/24 in any feeds from a security provider that say it can/should be blocked?  If so, I’d 
love to hear from you to track this down.  Over the new year we had some local schools start to block this IP space.

2) many companies have geolocation feeds and services that exist and pull in data.  The reputable people are easy to 
find, there are those that are problematic from time-to-time (I had a few customers leave Sling due to the issues 
with that service).

3) Have you had similar issues?  How are you chasing all the issues?  We’ve seen things from everything works except 
uploading check images to banks, to other financial service companies block the space our customers are in.  If we 
move them to another range this solves the problem.

4) We do IPv6, these places aren’t IPv6 modern at all, so that’s no help.

5) IRR+geofeed are published of course.  I’m thinking that it might be worthwhile that IP space have published 
placeholders when it’s well understood, eg: ARIN 4.9 space, I can predict what our next allocation would be, it 
would be great to have it be pre-warmed. 

I’ve only seen a few complaints against all our IP space over time, so I don’t think there’s anything malicious 
coming from the IP space to justify it, but it’s also possible they didn’t make it through.

If you’re with the FKA Savvis side, can you also ping me, I’d like to see if you can reach out to our most recent 
complaint source to see if we can find who is publishing this.  Same if you’re with Merit or the Michigan Statewide 
Educational Network - your teachers stopped being able to post to powerschool for their students over the new year 
break.  They’ve fed it up to their tech people towards the ISD.  Details available off-list.

Any insights are welcome, and as I said, I’d like to understand where the source list is as it starts out working 
then gradually breaks, so someone is publishing things and they are going out further.

- Jared


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