We help IT Professionals succeed at work.

We've partnered with Certified Experts, Carl Webster and Richard Faulkner, to bring you a podcast all about Citrix Workspace, moving to the cloud, and analytics & intelligence. Episode 2 coming soon!Listen Now

x

Dig to verify forwarders?

Medium Priority
1,072 Views
Last Modified: 2012-08-13
Is it possible to use dig to verify that forwarders on DCs are working?

I ask because once in a while some folks can't get to the internet and I don't always want to have to log onto the DC to verify they are working.

Any way I can do this from my workstation using DIG?
Comment
Watch Question

CERTIFIED EXPERT
Top Expert 2013
Commented:
I use nslookup for this
So from your client machine if you want to test a particular DC
> nslookup
>server <ip address>
then run your query
I know you asked about DIG and I'm sure that will get a response too.
Thanks
MIke

Not the solution you were looking for? Getting a personalized solution is easy.

Ask the Experts
CERTIFIED EXPERT
Most Valuable Expert 2019
Most Valuable Expert 2018
Commented:
You can actually already pass the DNS server to use in nslookup's command line as second argument, which saves a couple of keystrokes (and can be used in a batch script for automatic testing several forwarders):
nslookup www.experts-exchange.com <DNS server IP>
If you got multiple forwarders you can't predict whitch one will handle the query that you forward.

Run a "dcdiag /test:dns /v" from a DC and it will test the forwarders.


SG

Author

Commented:
Ok I did the dcdiag but it says Error: "Forwarders list has invalid forwarder: xx.xx.xx.xx"

But its not an invalid forwarder. These are what we use.

Any explanation?
Do you forward to the root-hints or your ISP DNS and how many forwarders do you use?

SG

Author

Commented:
We don't forward to the root hints. The IPS in the forwards are external DNS servers.
Access more of Experts Exchange with a free account
Thanks for using Experts Exchange.

Create a free account to continue.

Limited access with a free account allows you to:

  • View three pieces of content (articles, solutions, posts, and videos)
  • Ask the experts questions (counted toward content limit)
  • Customize your dashboard and profile

*This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

OR

Please enter a first name

Please enter a last name

8+ characters (letters, numbers, and a symbol)

By clicking, you agree to the Terms of Use and Privacy Policy.