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Windows 2000 DNS problems

Posted on 2003-03-05
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Last Modified: 2012-05-04
Here's the situation:
We've recently changed to another webhoster.  Now internally we can't access our website, but everybody else can.
My guess is there is something wrong with the DNS configuration at our company.  Will somebody confirm that and explain a solution.  Thanks in advance.
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Question by:h_le
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15 Comments
 
LVL 10

Expert Comment

by:kiranghag
ID: 8076774
take a look at your ip configuration, you might have missed out to change your new dns server name/ip
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Expert Comment

by:alexsys
ID: 8077000
ummm...too little info.
So these people are hosting your webpage.
Do they host your domain too?
If it's yes, then my guess is you have a scenario like this:

They host your dns records, while you keep a copy yourself,
internally, but when it comes to resolve www, you might have had a CNAME entry for host 'www', which might had pointed to your hosting provider, e.g. you.hosting.com.
This works internally, since noone from the Internet queries your internal DNS Server, but rather your host-providers's dns. e.g. dns1.hosting.com


If you switched to a different hosting provider, then the
old you.hosting.com won't work anymore of course, since they don't have your webpage anymore, and also, they would have changed their own dns entries to point to the new hosting server. You
might need to change the entry 'www' locally in your internal dns server (be it a CNAME or an A, whatever it is) to point your new provider. you.newhosting.com


More information would be great, like if they also host your dns records, and if you keep an internal dns server.


Hope this helps.
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Expert Comment

by:velimirmkd
ID: 8077676
Few very simple tasks to find out what is wrong in your situation.
First, if you know the IP of your website, try pinging, if that is OK, try pinging your website.  If this fails, then you have wrong DNS entry in your company pointing the record for yor website to the old IP that was used at your previous hosting company. - My bet is that this is the situation you are experinencing.  You can also use nslookup to ask the DNS server at the new webhosting company for your sites reckord.  
If you can ping your website (using fully qualified domain name) and can not display the webpage, then look other place then the DNS.  See FW configs if some ports are blocked that prohibit web traffic from your net to your webserver, and finnaly if you cant solve it call the new webhosting company.

Hope this helps
Velimir
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Accepted Solution

by:
monu_mcse earned 80 total points
ID: 8077830
dear
this is too little information to resolve the problem.

but if this is the scenario then .kindly configure your internal dns server to scyncronise with your webhoster DNS.
note both the domain name should be the same i mean internal & external dns.

in the nslookup it should resolve the external DNS First.



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Author Comment

by:h_le
ID: 8086044
Alright here's more information.
Upon changing the hosting company, they provided me an IP address of the website.  As long as I type the IP into the address bar we can visit the site.  From what I can see, the problem is internal. I think we may have our own DNS.  Tell me how can I change my domain name so that it doesn't point to the old ip address.  About pinging the the webpage, If I can reach it via internet explorer, chances are I can ping it--although i haven't tried.  Hope this help

Recap--How can I change the IP address on the dns so that my domain points to the new ip address?
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Expert Comment

by:velimirmkd
ID: 8086083
You will have to see what is the DNS that your pc use. Type ipconfig -all at command prompt and you'll get an idea.  If the IP of the DNS is on your LAN then find a the DNS server and change the record for your website to the new ip address.  If you are using a DNS that you can not administer then you will have to call the responsible person/company and ask them to change the record.  Anyway it is very easy to change and it is very easy for you to make sure you are having problems with DNS resolution or with something else.  Edit the hosts file on your pc and put manualy an entry for your website pointing to the new ip.  This must work, although I'm pretty sure you have a wrong entry in your DNS for the website from what you have explained.  But anyway try the trick with the hosts file.

Hope this helps
Velimir
0
 

Expert Comment

by:monu_mcse
ID: 8086380
now it seems that ur clients are not using the external DNS using internal DNS.

There is two ways to solve problem one is configure all

1) clients to use external DNS directly but for that i have to know that what type of connectivity that you use i mean leased line or isdn or dialup to connect internet..

if u r useing isdn or leased line give ip of ur external dns directly in clients TCP IP properties,DNS Configuration.

2)Configure ur internal server to forward DNS request to External dns.In DNS management console see the properties of ur dns and give external dns IP in forwarders tab .this ip should be of ur ISP's DNS ip .please give two dns ip INCASE ONE FAIL SECOND RESOLVES .

STILL UR PROBLEM NOT RESOLVES,THEN GIVE UR INTERNAL DNS SETTINGS IN DETAIL.
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Author Comment

by:h_le
ID: 8091696
What type of information are you looking for?  And how do I go about getting it.  If we are hosting our DNS internally than there is only one machine I can think of that may hold this information, and that system is running a windows 2000 advance sever on it.  On the other hand from the looks of the ip of the dns sever, I don't think we are hosting the dns internally.  I don't know who are where the hosting is for sure.  I can give you the ip of the dns sever but I don't know if that will help.  However if it does you may request it. We are not using an isdn or dialup.  We are using an SDSL ISP.  Hopefully that will shed some light into the situation.
Thanks again.
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Expert Comment

by:monu_mcse
ID: 8093395
see give the ip of dns in clients tcpip properties to resolve directly through external dns.that is e.g.202.56.224.135.....

if u installed windows 2000 adv server with fully qualified domain name With active directory,in this dns give the ip of dns in forwarders list as i explained before

e.g 202.56.224.135
202.56.224.132

set ur client to use ur internal dns that is win2k dns server e.g 10.1.1.1


STILL NOT RESOLVE
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Author Comment

by:h_le
ID: 8094105
monu_mcse, I'm reading what you are writing but its way over my head.  Will you give step by step instructions as to how to go about giving the ip of dns in fowarders list.  How do I find out if fully qualified domain name with active active directory was installed?  Thanks in advance.
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Expert Comment

by:monu_mcse
ID: 8100973
dear u have to tell me that did u installed active directory in win2k adv server or not ...if "yes" did u installed dns server or not.if no install it first by runing dcpromo from start -run then in dns manager click the server name add your host computer in forward and reverse zone.then in the server properties click the forwarders tab and give External dns e.g 202.56.224.135 in the list and press ok.




again start run type "nslookup"
type any host name of computer .
did u recieving the resolution of host with  ur internal dns server or not.

0
 

Author Comment

by:h_le
ID: 8115304
I friend of mind came in to look at it and he fixed the problem. I'm going to award monu mscse the points because i happened to waste his time the most.  If anybody has a problem with this feel free to argue.
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Author Comment

by:h_le
ID: 8115308
I forgot to thank monu mcse.  Thanks man.
0
 
LVL 10

Expert Comment

by:kiranghag
ID: 8116108
plz tell us how he did
0
 
LVL 10

Expert Comment

by:kiranghag
ID: 8116110
plz tell us how he did
0

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