nanog mailing list archives
RE: Purchasing IPv4 space - due diligence homework
From: "Torres, Matt via NANOG" <nanog () nanog org>
Date: Thu, 4 Apr 2019 20:56:13 +0000
Thanks NANOG. For those interested, here is a summary list of due diligence tasks for purchasing IPv4 on the secondary market: 1. Check out the seller (Google search). What is their story? Generally avoid hosting companies because they may have more block/black list cleanup to do. 2. Check the BGP looking glass Internet routing table. Make sure the IPv4 address is not routed right now. 3. Check the historical Internet routing table. It is a good sign if the IPv4 network was advertised from the right company/ASN without recent changes https://stat.ripe.net/widget/routing-history# 4. Check ARIN registration. Singular, long standing registration for the IPv4 space is a good sign. 5. Check block list / black list. SORBS and Spamhaus are good resources. It is a good sign if the IPv4 network does not show up at all. http://www.anti-abuse.org/multi-rbl-check/ 6. Check geo-location. It is a good sign if the IPv4 space shows up in the right global region. Try MaxMind. 7. There is a PowerShell script (that can be expanded on) to help expedite the checking process. https://www.saotn.org/powershell-blacklist-check-script/#more-2459 Thanks, Matt
Current thread:
- Re: Purchasing IPv4 space - due diligence homework, (continued)
- Re: Purchasing IPv4 space - due diligence homework Eric Dugas (Apr 03)
- Re: Purchasing IPv4 space - due diligence homework Nikolas Geyer (Apr 03)
- Re: Purchasing IPv4 space - due diligence homework Jared Mauch (Apr 03)
- Re: Purchasing IPv4 space - due diligence homework Valdis Klētnieks (Apr 03)
- Re: Purchasing IPv4 space - due diligence homework Jared Mauch (Apr 03)
- Re: Purchasing IPv4 space - due diligence homework Mike Hammett (Apr 03)
- Re: Purchasing IPv4 space - due diligence homework Marco Davids via NANOG (Apr 04)
- Re: Purchasing IPv4 space - due diligence homework Valdis Klētnieks (Apr 03)
- RE: Purchasing IPv4 space - due diligence homework Jeffrey Hathaway via NANOG (Apr 03)
- Re: Purchasing IPv4 space - due diligence homework Martin Hannigan (Apr 03)
- Re: Purchasing IPv4 space - due diligence homework William Herrin (Apr 03)
- RE: Purchasing IPv4 space - due diligence homework Torres, Matt via NANOG (Apr 04)