North American Network Operators Group
Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical

Re: is your host or dhcp server sending dns dynamic updates for rfc1918?

  • From: Randy Bush
  • Date: Fri Apr 19 13:08:37 2002 
>>> now as to who's responsible, first off you have to understand that we
>>> block rfc1918-sourced packets at our AS boundary.  (otherwise these
>>> numbers would be Much Higher
>> are you sure?  i suspect they are windows 2000 systems behind NATs.  so
>> the dynamic update is for the 1918 address, but the packet source address
>> has been natted into real space.
> according to our border flow stats, not all of them get nat'd on the way
> here.

we already knew nats were broken.

but i still believe that win2k behind nats probably explain most of the
data behind the updates for 1918 space from non-1918 ip source addresses.

randy