[GTALUG] odd DHCP participant on Rogers cable internet

[Lennart Sorensen]

On Fri, Oct 23, 2015 at 11:10:32AM -0400, D. Hugh Redelmeier wrote:
> I've just noticed that DHCP responses come from 7.11.164.145.
> According to whois, that address belongs to the US Department of Defence.
> 
> I'm pretty sure that that means Rogers has hijacked DoD addresses.  What's 
> up with that?
> 
> NetRange:       7.0.0.0 - 7.255.255.255
> CIDR:           7.0.0.0/8
> NetName:        DISANET7
> NetHandle:      NET-7-0-0-0-1
> Parent:          ()
> NetType:        Direct Allocation
> OriginAS:       
> Organization:   DoD Network Information Center (DNIC)
> RegDate:        1997-11-24
> Updated:        2006-04-28
> Ref:            http://whois.arin.net/rest/net/NET-7-0-0-0-1

http://www.dslreports.com/forum/r25679029-Why-is-my-first-hop-to-a-DoD-assigned-IP-address

explains that apparently 7.0.0.0/16 is reserved for internal use only
behind the DoD firewalls, and can not be routed publicly, and rogers has
decided to use those for internal addresses (probably to avoid conflicts
with what customers do behind their own routers).  So rogers is apparently
working to change 10.* to 7.* for internal equipment.

So it looks weird, but it might actually be a good idea on the part
of rogers.  Surprisingly.

-- 
Len Sorensen