Vista in a single-label DNS domain

[chicagotech]

Thanks fpr the response Robert. I am not doing anything with Windows
domains, just trying to get name resolution to work properly. Though I want
to do some experimentation with it later, I disabled IPv6 just to see if it
had any effect. It didn't, other than of course I no longer saw the 2 IPv6
LLMNR frames on the wire.

I suppose that the easiest thing to do would be to introduce a DNS domain
such as "local" into the mix. However, I am trying to understand this
behavior in Vista.

- Why doesn't Vista resolve the name from the local DNS cache after it is
initially resolved?
- Why doesn't the hostname appear in the "ipconfig /displaydns" output after
it is initially resolved? (see comments below)
- If the name isn't in the cache, why does flushing it have any effect
whatsoever?

If I disable client side DNS caching (net stop dnscache), the name resolves
every time.

It is interesting to note that in XP also the resolved name does not appear
in the cache. Rather, the XP client queries the name server every time.
For a name server, I am using dnsmasq on a DD-WRT router. It doesn't appear
that this is returning an authoritative response. I just notice that the
TTL on the inital nameserver response is 0, so that would explain why the
entry is not placed into the cache. It does NOT explain why resolution
fails after the initial attempt nor why flushing the cache makes the name
resolve again. It would appear to me that there is a flaw in the resolver
caching logic somewhere along the way.

-Jeff

[chicagotech]

Thank you for the update.

Bob Lin, MS-MVP, MCSE & CNE
Networking, Internet, Routing, VPN Troubleshooting on http://www.ChicagoTech.net
How to Setup Windows, Network, VPN & Remote Access on http://www.HowToNetworking.com
"
More info. I found a dnsmasq option that allows me to specify the TTL in
DNS replies. If set to anything other than 0 (even 1 second), the problem
goes away.