On Wed, 19 Jul 2000, Michael M. Rye wrote:
> "Nomad of Norad (David C. Hall)" <[EMAIL PROTECTED]> wrote:
> > For the last coupla days, I've intermittently gotten the
> > following message in a requester when I connect with my ISP:
> >
> > Your IP address could not be resolved,
> > so Miami has to fall back to your
> > IP address as your host name.
> > Either your Internet Service
> > Provider does not support reverse
> > mapping of the SLIP.PPP ports,
> > or there is a problem in the
> > DNS servers.
> >
> > After I clear that requester, everything seems to work
> > like normal.
> > Anyone know what's going on? I've been using Miami for
> > months, and this is the first time I've EVER had this
> > problem. I've not changed anything at my end in awhile...
>
> I've seen this happen when the ISP adds a new bank of modems
> into their dial-in racks. Typically new modem banks are tied
> into a new server which is misconfigured and causes the problem
Sort of. Usually the misconfigured server is the DNS server, which wasn't
updated to include the new IPs. An exception is when they screw up and
include a broadcast IP in the assignable range. Since broadcast IPs
*shouldn't* be assigned, it's prefectly reasonable that they don't have
associated hostnames.
Also note that you can get this if DNS isn't working at all, but you can
test that by trying something like "Miami:MiamiResolve www.aol.com".
> you are seeing. You can do one of two things:
> 1) Dial in and when you get the error, call your ISP's
> technical support line and tell them they have a reverse
> DNS problem. They'll usually ask for your user ID and can
> track down the problem by tracing your ID to your connection.
> Obviously, you need two phone lines for this.
Better yet, after getting online and verifying that normal DNS is working
(see above), type "Miami:MiamiResolve $HOSTNAME". If this comes up with a
hostname, then Miami is confused, but more likely you'll get just the IP.
Then tell your ISP exactly what IP is lacking the rDNS mapping (though it
may be representative of a block).
> 2) There's a button in the Miami config (in the GUI section,
> I think) called "Show requesters for protocol errors".
If you want to hide the error, it's better just to disable the dynamic
hostname feature than to hide all errors. But note that certain servers
may refuse to talk to you without a valid rDNS mapping, so it's better to
get the problem fixed correctly.
Fred Wright
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