Solved

cannot ping external server by name except with -a option

Posted on 2008-06-24
4
239 Views
Last Modified: 2012-08-13
I have set up an external server. I can ping it by ip address or name external to my network. Internally I can ping the ip address but not by name, the error is Could not find host. I can ping using -a option. nslookup internally gives the correct address from my dns server. Any sugggestions?
0
Comment
Question by:johnelly
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
4 Comments
 
LVL 71

Expert Comment

by:Chris Dent
ID: 21853455

Hey there,

It would suggest that you have an internal DNS Server that is authoritative for the same zone as the external DNS Server.

You normally bump into this kind of situation when running Active Directory, where the domain name there is the same as the domain name of the external domain.

The solution is pretty simple. Any public DNS record within that zone you need to be internally accessible must be created (duplicated) on the private DNS Server.

Chris
0
 
LVL 6

Expert Comment

by:ilantz
ID: 21853845
.. or you could allow your "console" or other range in an allow rule for the icmp protocol 0 in your firewall :) , because you resolve the server externalname to its external ip ...
0
 

Author Comment

by:johnelly
ID: 21855156
Yes, the internal zone is mycompany.co.uk and the external domain is somethingelse.mycompany.co.uk  Internally I put an A record pointing to the external server, is that sufficient?
0
 
LVL 71

Accepted Solution

by:
Chris Dent earned 500 total points
ID: 21855175

Yep, that's all you need :)

You'll have to do that with any other public records under mycompany.co.uk if you need to resolve internally.

Chris
0

Featured Post

Free Tool: SSL Checker

Scans your site and returns information about your SSL implementation and certificate. Helpful for debugging and validating your SSL configuration.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Most DNS problems are VERY easily troubleshot and identifiable if you can follow the steps a DNS query takes. I would like to share the step-by-step a DNS query takes from the origin to the destination. _____________________________________________…
Short answer to this question: there is no effective WiFi manager in iOS devices as seen in Windows WiFi or Macbook OSx WiFi management, but this article will try and provide some amicable solutions to better suite your needs.
In an interesting question (https://www.experts-exchange.com/questions/29008360/) here at Experts Exchange, a member asked how to split a single image into multiple images. The primary usage for this is to place many photographs on a flatbed scanner…

740 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question