Usage of fd00::/8 on the Interwebz - something with filters and uRPF

[sthaug at nethelp.no]

> > Hmmmm fd00::/8, that really should never ever be visible on the
> > Internet, being Unique *LOCAL* Addresses.
> 
> FWIW this is not unique to ULAs. When tracerouting through AS174, for
> example, you'll see IPv4-mapped IPv6 addresses, courtesy of 6PE. At
> least that was the case a couple of years back.
> 
> That said, if you go looking, I'll wager you'll find RFC1918 addresses
> IPv4 traceroutes too.

Absolutely. Unless you block these at your borders (we do).

Steinar Haug, AS 2116