[Last Call] Learn about multicloud storage options and how to improve your company's cloud strategy. Register Now

x
?
Solved

DNS unable to resolve

Posted on 2011-03-09
4
Medium Priority
?
2,540 Views
Last Modified: 2012-05-11
Hi everyone,

I’m trying to setup a server Win2008 with IIS on for webapplication, called “Host1”. I have 2 VLANS, one for the server farm (20.x.x), and one for clients(192.x,x), they’re both connected to the internet. And both Vlans use the same DNS server.

For an unjustifiable reason, I can only place this server on the clients VLan.

My problem is:

I can access the web application (http://host1) from 20.x.x.x just fine.

However when I try to access the same application from the clients Vlan, I get an error on Internet Explorer “Network Error (dns_unresolved_hostname) Your requested host "Host1" could not be resolved by DNS.” I tried using http://host1, http://host1.mydomain.com, and also tried http://host1:8080... I couldn’t try using http://192.x.x.x because my ISP doesn’t allow me to browse using IP address.
I checked my DNS, I do have an A host record of the server. I even tried to manually add it to the hosts file on my XP machine. I can ping and NSlookup just fine from all machines.

My conclusion is as follows:
When Client workstation tries to connect to the web application, it goes straight to the Internet’s DNS to check the host name, that is why I am getting a DNS unable to resolve error.

Please correct me if I’m wrong, I’m very frustrated. I need your Help!
0
Comment
Question by:ahmedals
[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 9

Expert Comment

by:Chev_PCN
ID: 35093478
Your browser should be using the DNS settings specific to the local machine. On a workstation or server showing this problem, what result do you get back if you open a cmd box & run "nslookup host1"?
You say you have 1 DNS server. Do you have multiple zones on that DNS instance?
If so, try adding Host1 to both zones, e.g. host1.server.farm and host1.clients.net.
0
 
LVL 4

Expert Comment

by:bitla
ID: 35093480
On the client PCs in the TCP/IP properties add DNS ip address of the host1 domain and also make sure there is forward and reverse lookup zones for the Host1 in the DNS Server.
0
 

Accepted Solution

by:
ahmedals earned 0 total points
ID: 35093759
Hi Guys,

Thank you for your comments. I have already done that previouslym but still didn't work.

I found a solution to my problem.

I had forgotten to put an exception on my BlueCoat proxy device, thats why it was denying it access.
0
 

Author Closing Comment

by:ahmedals
ID: 35135771
I had forgotten to put an exception in my proxy server.
0

Featured Post

Efficient way to get backups off site to Azure

This user guide provides instructions on how to deploy and configure both a StoneFly Scale Out NAS Enterprise Cloud Drive virtual machine and Veeam Cloud Connect in the Microsoft Azure Cloud.

Question has a verified solution.

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

I wrote this article to explain some important DNS concepts that should be known to avoid some typical configuration errors I often see in forums. I assume that what is described here is the typical behavior of Microsoft DNS client. I don't know …
There have been a lot of times when we have seen the need to enter a large number of DNS entries in a forward lookup zone. The standard procedure would be to launch the DNS Manager console, create the Zone and start adding new hosts using the New…
How to fix incompatible JVM issue while installing Eclipse While installing Eclipse in windows, got one error like above and unable to proceed with the installation. This video describes how to successfully install Eclipse. How to solve incompa…
In a question here at Experts Exchange (https://www.experts-exchange.com/questions/29062564/Adobe-acrobat-reader-DC.html), a member asked how to create a signature in Adobe Acrobat Reader DC (the free Reader product, not the paid, full Acrobat produ…
Suggested Courses

650 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