> On 18 Dec 2017, at 1:20 pm, Robert Webb <rw...@ropeguru.com> wrote: > > Apologies for not responding sooner. > > This came to light with me on a forum where someone posted that they thought > it strange that their MTA received an IP that is assigned to the DoD DNIC. > > Where I work I have the opposite issue. They have a lot of public IPv4 space > and only use it internally never be advertised to the internet. Something I > have never agreed > With doing. > > Robert
Why? This is a perfectly legitimate use of the IP addresses. The purpose of assigning addresses is so that they are unique WORLD WIDE in whatever context you wish to use them in. Mark > -----Original Message----- > From: Richard Porter [mailto:rich...@pedantictheory.com] > Sent: Sunday, December 17, 2017 8:25 PM > To: Robert Webb <rw...@ropeguru.com> > Cc: nanog@nanog.org > Subject: Re: Companies using public IP space owned by others for internal > routing > > Robert, > I’ve heard of two cases recently, large companies (non carrier/ISP). One > company looking to solve challenge with IPv6 and 6to4 and DNS. > > Also curious how wide-spread this is? Maybe just the kick in the butt for > catching the elusive IPv6 unicorn? > > ~Richard > >> On Dec 17, 2017, at 3:30 PM, Robert Webb <rw...@ropeguru.com> wrote: >> >> Will anyone comment on the practice of large enterprises using non RFC1918 >> IP space that other entities are assigned by ARIN for internal routing? >> >> Just curious as to how wide spread this might be. I just heard of this >> happening with a large ISP and never really thought about it until now. >> >> Robert > -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: ma...@isc.org
