I worked alongside a company that used addresses assigned to the Syrian govt for their "guest" network. They were a pretty large org, presumably this was done to reduce risk - firewall rules, accidentally leaking guest prefixes to their internal nets, or just straight-up simplicity. They were in a pretty heavily regulated industry with restrictions on what companies they could do business with, so there probably wasn't a huge risk of reachability issues. On Sunday, December 17, 2017, joel jaeggli <joelja@bogus.com> wrote:
On 12/17/17 14:30, Robert Webb 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. every time I seen a traceroute with 11/8 22/8 26/8 in it I am duly impressed. Robert