How is DNS resolution working?

  • Thread starter Thread starter Ohaya
  • Start date Start date
Ace Fekay said:
In

I haven't given up... Kind of a confusing scenario you have. I see you
posted a fresh post regarding this. Hopefully someone else will see
something that I/we may have missed.
Click to expand...


Ace,

Thanks.

Apologies about the new thread.

What happened is that I now have my new test setup here, and with the
settings that I posted earlier and this setup, it seems like the name
resolution of machine names on the external network is no longer
happening, but then I started seeing the Event IDs that I mentioned in
my newer post/thread, so I thought that it'd make sense to start that
thread.

I'm still not sure why the configuration at the test lab is resolving,
but since I have my new setup here, I'm hoping that I can figure things
out, and then transfer over to the test lab later.

Jim
 
Hi Jim,

There are root pointers in every DNS server. Besides this, they also
make the DNS resolution in recursive or iterative way i.e. sending the
query furthur or resolution by itself only. That is why it is possible
to get a machine outside your local network. That is the very reason
which tells us that DNS reslution is working absolutely perfectly
through DNS pointers. Although I dont know if you have removed the DNS
forwarders in your internal server or not.

Animesh
 
In
Animesh said:
Hi Jim,

There are root pointers in every DNS server. Besides this, they also
make the DNS resolution in recursive or iterative way i.e. sending the
query furthur or resolution by itself only. That is why it is possible
to get a machine outside your local network. That is the very reason
which tells us that DNS reslution is working absolutely perfectly
through DNS pointers. Although I dont know if you have removed the DNS
forwarders in your internal server or not.

Animesh
Click to expand...

Unless I misinterpreted your reasonings...he doesn't have a gateway set to
resolve Internet names, just he's saying he's resolving his external
subnet's names, which is one of the interfaces on MachineA, which is not
what he wants to do.

--
Regards,
Ace

Please direct all replies to the newsgroup so all can benefit.
This posting is provided "AS IS" with no warranties.

Ace Fekay, MCSE 2000, MCSE+I, MCSA, MCT, MVP
Microsoft Windows MVP - Active Directory
 
In
Ohaya said:
Ace,

Thanks.

Apologies about the new thread.

What happened is that I now have my new test setup here, and with the
settings that I posted earlier and this setup, it seems like the name
resolution of machine names on the external network is no longer
happening, but then I started seeing the Event IDs that I mentioned in
my newer post/thread, so I thought that it'd make sense to start that
thread.

I'm still not sure why the configuration at the test lab is resolving,
but since I have my new setup here, I'm hoping that I can figure
things
out, and then transfer over to the test lab later.

Jim
Click to expand...

Don't worry about the new thread. Better to re-expose to fresh eyes since I
was hitting a wall previously.

I would probably suggest to mimic your test enviornment to the production
servers. Other than that, I would probably also suggest to eliminate the
dual homed setup and stick with an internal only NIC and you can still
access the external network from it, provided of course you only use the
internal DNS, setup a forwarder to the external DNS and set your gateway.
Sometimes it's easier that way. Keep in mind what Kevin mentioned about the
MS Client and F&P services and NetBIOS being disabled on the external NIC if
you want to continue with the dual homed setup.


--
Regards,
Ace

Please direct all replies to the newsgroup so all can benefit.
This posting is provided "AS IS" with no warranties.

Ace Fekay, MCSE 2000, MCSE+I, MCSA, MCT, MVP
Microsoft Windows MVP - Active Directory
 
Hi Ace,

What I understand on this issue is that he has got two different DNS
servers one of which is the internel DNS server and the other one is
the External, and they have some pointers pointing the DNS request to
go to the right place to get rtesolved.

Now my point here was that if he has got any DNS address at all
configured (in this case both have DNS address), through ICMP
broadcast or through the DNS resolution it is going to work any way
because the switch knows where to send the packet when it also has the
DNS server address.

May be what he should try here is having a look at the his DNS
pointers because even in absense of the gateways, it is going to get
resolved anyway.

Give it a try, back the dns zone data, try removing a couple of data
here and there and i think that should work in this case.


Animesh
 
In
Animesh said:
Hi Ace,

What I understand on this issue is that he has got two different DNS
servers one of which is the internel DNS server and the other one is
the External, and they have some pointers pointing the DNS request to
go to the right place to get rtesolved.

Now my point here was that if he has got any DNS address at all
configured (in this case both have DNS address), through ICMP
broadcast or through the DNS resolution it is going to work any way
because the switch knows where to send the packet when it also has the
DNS server address.

May be what he should try here is having a look at the his DNS
pointers because even in absense of the gateways, it is going to get
resolved anyway.

Give it a try, back the dns zone data, try removing a couple of data
here and there and i think that should work in this case.


Animesh
Click to expand...

You're right Animesh. Jim finally posted the ipconfig in his other thread
and we made note to only use the internal DNS. He had his router as a DNS
address... a no-no!!

:-)


--
Regards,
Ace

Please direct all replies to the newsgroup so all can benefit.
This posting is provided "AS IS" with no warranties.

Ace Fekay, MCSE 2000, MCSE+I, MCSA, MCT, MVP
Microsoft Windows MVP - Active Directory
 
Ace Fekay said:
In

You're right Animesh. Jim finally posted the ipconfig in his other thread
and we made note to only use the internal DNS. He had his router as a DNS
address... a no-no!!
Click to expand...

Ace,

Just to be clear, the original system ipconfig (the one in the lab)
didn't have any entry in the DNS pointer on the machine A (the
multi-homed member server). The ipconfig /all that I posted in that
other thread was from the test system that I put together last weekend.
As I mentioned, that configuration has gone through numerous changes as
I chased the problem in this thread and the other Event ID thread, and
when I posted the ipconfig /all in the other thread, it was just at the
point that it appeared that I had resolved the Event ID 1000 problem.

Again, thanks for all of your help... Again, this has been very
enlightening...

Jim
 
In
Ohaya said:
Ace,

Just to be clear, the original system ipconfig (the one in the lab)
didn't have any entry in the DNS pointer on the machine A (the
multi-homed member server). The ipconfig /all that I posted in that
other thread was from the test system that I put together last
weekend.
As I mentioned, that configuration has gone through numerous changes
as
I chased the problem in this thread and the other Event ID thread, and
when I posted the ipconfig /all in the other thread, it was just at
the point that it appeared that I had resolved the Event ID 1000
problem.

Again, thanks for all of your help... Again, this has been very
enlightening...

Jim
Click to expand...

WIth the different config changes and posts, it was difficult to keep track
of all this. Glad it was helpful in your pursuit!

:-)


--
Regards,
Ace

Please direct all replies to the newsgroup so all can benefit.
This posting is provided "AS IS" with no warranties.

Ace Fekay, MCSE 2000, MCSE+I, MCSA, MCT, MVP
Microsoft Windows MVP - Active Directory
 
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