Solved

cannot ping external server by name except with -a option

Posted on 2008-06-24
4
236 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
  • 2
4 Comments
 
LVL 70

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 70

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

DevOps Toolchain Recommendations

Read this Gartner Research Note and discover how your IT organization can automate and optimize DevOps processes using a toolchain architecture.

Question has a verified solution.

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

SUMMARY Enterprise backup in a heterogeneous network is a subject full of complications and restrictions. Issues such as filename & path structure, attributes and extended metadata always tend to complicate the subject to the extent where either …
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 this video I am going to show you how to back up and restore Office 365 mailboxes using CodeTwo Backup for Office 365. Learn more about the tool used in this video here: http://www.codetwo.com/backup-for-office-365/ (http://www.codetwo.com/ba…
Many functions in Excel can make decisions. The most simple of these is the IF function: it returns a value depending on whether a condition you describe is true or false. Once you get the hang of using the IF function, you will find it easier to us…

895 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

Need Help in Real-Time?

Connect with top rated Experts

16 Experts available now in Live!

Get 1:1 Help Now