Re: DNS, WINS-R, Other?

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Hmmm.... node type of 0x8, you say? Option "046 WINS/NBT Node Type' on our
DHCP server is set to 0x8. It's been years since that was set (I know that
at the time it was set most of the clients on the network were Windows 95),
so I don't even remember why its set to that :) That might explain things.

I'll do a little reading on the subject, thanks for your input!

Rob


"Ace Fekay [MVP]" wrote:

> In news:E3CA53D8-E7F9-4C06-B2CB-8A4454A37D95@xxxxxxxxxxxxx,
> Rob Wagner <RobWagner@xxxxxxxxxxxxxxxxxxxxxxxxx> made this post, which I
> then commented about below:
> > No, the record does not show up in DNS or in the WINS database.
> >
> > We have WINS-R enabled as a workaround for some clients that
> > intermittently do not get their DNS records dynamically registered
> > when they connect in via VPN. Usually they work fine, but sometimes
> > our VPN users don't register correctly. Unfortunately, we have a
> > couple of UNIX servers that need to be accessible, and they reject
> > connections if the DNS reverse lookup fails.
> >
> > I'm not curious about controlling WINS-R resolution, I'm curious about
> > WINS-R resolution working on hosts that are not registered in the WINS
> > database. It seems that the DNS/WINS server is going out and directly
> > querying the host at the requested IP address for its NetBIOS host
> > name.
>
> What type of VPN server are you using? Do the VPN clients use DHCP? If
> Windows VPN, I'm sure you have it set to acquire an IP from DHCP, which you
> can force DHCP to force registration for everything.
>
> If the host is not registered in WINS, I can't see how a WIN-R will find it
> if DNS doesn't, since that's the order it uses.
>
> Back to your original post, you said:
> ===============
> "There are no records in our WINS servers that match these lookups, however
> (and there shouldn't be). It looks like the DNS/WINS server is doing some
> kind of a direct NetBIOS query of the host at that IP address to find out
> what its host name is, then caching that lookup in the NetBIOS cache. (and
> in turn, serving that cached entry as a WINS-R response)
>
> Is this behaviour I can control?"
> ===============
>
> I believe what *may* be going on is the resolution method. Win2000 and newer
> is based on hostname lookup, then netbios if hostname fails. Hostname lookup
> starts with the local DNS cache, then DNS, then it queries using the NetBIOS
> process. For NetBIOS, if the NetBIOS node type is 0x8, it will first query
> it's local NetBIOS cache, then WINS, then broadcast. If there's nothing in
> cache, or in WINS, then that maybe what is going on where it's broadcasting
> for the machine's name (not necessarily a direct NetBIOS query of the host
> with that IP address).
>
> Ace
>
>
>
>
>
>
>
>
.

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