Re: Comcast DNS servers returning bogus information

[Scott Bennett <bennett@xxxxxxxxxx>]

     On Sun, 24 Aug 2008 12:10:27 -0500 Drake Wilson <drake@xxxxxxxxxxxx>
wrote:
>Quoth Scott Bennett <bennett@xxxxxxxxxx>, on 2008-08-24 12:03:13 -0500:
>>      The only problem is that that explanation doesn't explain why their
>> name servers give out the identically wrong information to computers
>> elsewhere on the Internet.
>
>Those name servers may only be shown by DHCP to users who are placed
>in this bogus state; other users may be directed to other nameservers.

     Yes, I understood your point the first time.  The problem is that
that explanation doesn't cover the responses to queries coming from
elsewhere.

>Possibly nobody should or would be querying those ones normally, and
>those ones (and only those ones) are configured to always respond that
>way.
>
     I guess I don't understand.  The name server data are supposed to
be accurate in order for the Internet to function properly.  I found that
the two servers in question respond with the same address for every A RR
that is requested, without regard to whether the name and domain should
resolve to a Comcast IP address, an NIU IP address, or a UW Madison IP
address.  Further, they both give out that same wrong IP address on the
Comcast net for each of those queries, and they give them out that way
without regard to the source address of the query.  If they didn't want
to respond to such queries, they should do that by either forwarding the
query to an appropriate server for the domain queried or returning a no
answer response.


                                  Scott Bennett, Comm. ASMELG, CFIAG
**********************************************************************
* Internet:       bennett at cs.niu.edu                              *
*--------------------------------------------------------------------*
* "A well regulated and disciplined militia, is at all times a good  *
* objection to the introduction of that bane of all free governments *
* -- a standing army."                                               *
*    -- Gov. John Hancock, New York Journal, 28 January 1790         *
**********************************************************************