I'm so confused

[Barry Margolin]

In article <9rl1r7$ih4 at pub3.rc.vix.com>,
Rick Hagedorn <hagedorn at ameritech.net> wrote:
>When I did dig -x 66.73.83.41 (one of "my" IPs), the result was from the
>ISP.
>
>Is there a limitation to this set-up?  Does it mean that I can't set a
>reverse lookup or something?  Because when I try "telnet students.uiuc.edu"

Consumer ISPs generally don't offer customer reverse DNS delegation.

>I'm told by their network "Your machine is not allowed to connect to this
>host due to your host not being properly registered in the DNS...This
>indicates a problem with the DNS at YOUR end...Consult your local network
>administrator to get your faulty entry fixed."  The "host" in this scenario
>is probably 66.73.83.46 (NAT).
>
>Is there a "fault" with the DNS entry that I can remedy?  Would you need
>more information from my config files to answer that?

This is a fault of the ISP.  They *should* have DNS entries for all their
customers' addresses (typically they point to names like
host123-456.dialup.company.net), but Ameritech apparently doesn't.  There's
nothing you can do, this is something they should fix, so you should report
the problem to their Customer Support Department.

-- 
Barry Margolin, barmar at genuity.net
Genuity, Woburn, MA
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