nanog mailing list archives
Re: Geoip lookup
From: Rob Seastrom <rs () seastrom com>
Date: Thu, 23 May 2013 20:54:39 -0400
This may be just a case of getting what you pay for, but Maxmind marks entire netblocks as proxies, puts 'em in the wrong country, and ignores repeated efforts by the registrant of the address space to set the record straight. The problem comes when people actually do stuff with the information, like block access to legitimate web sites because the're in "proxy space" and therefore assumed to be bad guys (believe it or not this practice is widespread by well-intentioned but clueless folk). Caveat utilitor. -r chip <chip.gwyn () gmail com> writes:
I've used the MaxMind Lite geo-ip database plus some perl modules and a BGP table to get something fairly close. Anything in the BGP table that was larger than a /20 I split into /20's. For my use case, this was close enough. I then grabbed 30 or so IP's within the range and geo-ip mapped them. You can then apply some algebra and get a general idea of where things are or are not. Things I used: http://search.cpan.org/~plonka/Net-Patricia-1.014/Patricia.pm - For ip/prefix/lat-lon mapping http://search.cpan.org/~borisz/Geo-IP-1.41/lib/Geo/IP.pm - For Geo-IP lat/lon data http://dev.maxmind.com/geoip/legacy/geolite - Maxmind's city database http://data.caida.org/datasets/routing/routeviews-prefix2as/ - for BGP prefix/mask + src ASN info Good luck! --chip On Thu, May 23, 2013 at 3:47 PM, shawn wilson <ag4ve.us () gmail com> wrote:What's the best way to find the networks in a country? I was thinking of writing some perl with Net::Whois::ARIN or some such module and loop through the block. But I think I'll have to be smarter than just a simple loop not to get blocked and I figure I'm not the first to want to do this. I've noticed some paid databases out there. They don't cost much but are they even worth what they charge? Ie, countryipblocks.net doesn't list quite a few addresses from a country I've looked at blocking. Isn't this information free from the different *NICs anyway? This is probably two questions: a program that smartly looks for country's blocks in a block and are GeoIP services worth anything?-- Just my $.02, your mileage may vary, batteries not included, etc....
Current thread:
- Geoip lookup shawn wilson (May 23)
- Re: Geoip lookup Joe Abley (May 23)
- Re: Geoip lookup shawn wilson (May 23)
- Re: Geoip lookup shawn wilson (May 23)
- Re: Geoip lookup Joe Abley (May 23)
- Re: Geoip lookup shawn wilson (May 23)
- Re: Geoip lookup shawn wilson (May 23)
- Re: Geoip lookup Joe Abley (May 23)
- Re: Geoip lookup Rob Seastrom (May 23)
- Re: Geoip lookup Andreas Larsen (May 23)
- Re: Geoip lookup David Conrad (May 23)
- Re: Geoip lookup Andreas Larsen (May 23)
- Re: Geoip lookup John Curran (May 24)
- Re: Geoip lookup Barry Shein (May 24)
- Re: Geoip lookup Owen DeLong (May 23)
- Re: Geoip lookup bmanning (May 23)
- Re: Geoip lookup Owen DeLong (May 24)
- Re: Geoip lookup Jean-Francois Mezei (May 24)
- Re: Geoip lookup Owen DeLong (May 24)