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Website won't work within domain network

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Website won't work within domain network

maq2429
My full domain controller name is dc.dc.abc.local and my website name is www.abcindia.com. My DC is DHCP,DNS,ADS server with 25 nodes connected and internet goes through my DC.

The issue is my website www.abcindia.com works fine all over except within my DC network. I have contacted my ISP and website host and they say they are not blocking it.

1) My domain name is not registered.
2) My network is designed as follows
The ISP cable goes to router's Internet Port and from router's LAN port one cable comes to my DC and another LAN port of router is connected to switch and from switch all clients are connected.

The router IP is the gateway and i need internet for AV and Updates and also for some FTP use on DC.

I use static IP from ISP and the website work for few hrs,or next day or next week,then it stops working within my network and if i change the static IP(i have 5 public ips from ISP) the website works again for few hours or until its again blocked.

the nslookup shows request time out after 12hops( its goes through till phoenix ) then Request timeout.

later on i found that one domain is registered on name of dc.abc.india.com..is this why my website won't work through my domain controller because its not registered and getting conflicted by the registered domain.

but i am using .local in my domain name.

Please let me know a solution and please let me know if you need any details on this issue to help me out...

Thanks
MAQ

Clarifications

JPElectron

When you ping abcindia.com on the DC what do you get?
When you ping abcindia.com on a workstation what do you get?

What DNS server(s) are specified on the workstations? (should be only the IP of the DC)

maq2429

i get reply from abcindia.com on DC and also same reply in the workstation.
Workstations are getting DC's IP as DNS.

maq2429

when the site is not working i get Request time Out on both DC and workstations.

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    JPElectron

    On your AD server, under DNS server, properties, you should have forwarders listed (the IP's of your ISP's DNS servers) did you do that? I might suggest that you use Google DNS there instead, enter 8.8.4.4 and 8.8.8.8 in the list.

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    maq2429

    Yes i did that and also i had already checked with the google DNS u mentioned...still the website is getting blocked after a time span.

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    dandaman2234

    Have you set the default DNS server IP address on your DC's NIC to be the IP address of the DC server (as it is the DNS server as well)? If you have, you could have a look to see if 'abcindian.com' is listed as an alias for another address within you DNS listing?

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    JPElectron

    On your AD server, under DNS server, properties, you should have forwarders listed (the IP's of your ISP's DNS servers) did you do that? I might suggest that you use Google DNS there instead, enter 8.8.4.4 and 8.8.8.8 in the list.

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    maq2429

    Yes i did that and also i had already checked with the google DNS u mentioned...still the website is getting blocked after a time span.

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    dandaman2234

    Have you set the default DNS server IP address on your DC's NIC to be the IP address of the DC server (as it is the DNS server as well)? If you have, you could have a look to see if 'abcindian.com' is listed as an alias for another address within you DNS listing?