Can't resolve DNS

Question

Hello; I'm trying to consume a webmethod but it seems that my application can't resolve DNS. The problem surfaces when I configure my application with an url (e.g.: http://mywebservice.com/webservice/methods.asmx), but it does not when I access the same webmethod through the server's IP address.

The thing is that I need to access the webservice using the url and not the IP address due to an existing DHCP server policy.

Can anyone help me ?

Thanks in advance.

UPDATE: Checking out what moocha asked me to do, I found out that:

D:>nslookup server.com Server: dnsserver.mycompany.com Address: XXX.YYY.XXX.YYY

*** dnsserver.mycompany.com can't find server.com: Non-existent domain

Answer 1

Have you tried confirming the same DNS query works via nslookup from the same system on which your application runs?

I.e.,

C:\>nslookup
Default Server:  whatever.dns.example.org
Address:  111.222.333.111

> set q=a
> mywebservice.com
Server:  whatever.dns.example.org
Address:  111.222.333.111

Non-authoritative answer:
Name:    mywebservice.com
Address:  208.254.26.139

Answer 2

Digging a little bit more I found that there is a proxy in between my PC and the server. Therefore, I'm oblied to log with a valid user in order to access the internet. The problem was that my application's server (where the IIS is running) was configured to run using anonymous access. All I had to do was to configure in the IIS an user that has permission to access the internet (through the proxy). Finally the problem is solved.

There was another option, I could use the logged user's credentials to grant access through the proxy; but that required that all users use the same log in information for the application and the intranet.