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error 'Page cannot be displayed' when internal users try to access external website

I have local domain  abc.com  and external website www.abc.com 
i have added a host record to the DNS pointing to the external website IP address

but still internal users try to access abc.com via a web browser it will result in 'Page cannot be displayed'
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Hani Alhabshi
Asked:
Hani Alhabshi
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3 Solutions
 
MAS (MVE)EE Solution GuideCommented:
Hi Hani,
Option 1. Please add a DNS A record entry in your abc.com zone  and inform the users to prefix www when accessing website
www --->  187.177.125.122  (your website external IP)

Option 2. Install IIS on the DCs and redirect all http/https traffic.

https://social.technet.microsoft.com/Forums/ie/en-US/4d97325b-ff3a-4f46-ba6e-dc3f4ff978e1/dns-internal-domain-has-same-name-as-external-website?forum=winserverNIS

Please read this for better understanding
https://blogs.msmvps.com/acefekay/2009/09/03/split-zone-or-no-split-zone-can-t-access-internal-website-with-external-name/
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Hemil AquinoNetwork EngineerCommented:
Where the external website hosted to? within your company or out of your company?
If it's out of your company then you need to login to your DNS provider such as godaddy and map www host to the server IP address of your website.
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DrDave242Commented:
but still internal users try to access abc.com via a web browser it will result in 'Page cannot be displayed'

Are those users attempting to browse to abc.com or www.abc.com? This is important, because only www.abc.com even has a chance of working in this environment.

If you try to browse to www.abc.com from inside the office, does the URL in the address bar change from www.abc.com to simply abc.com? If so, there's a redirect on the website that will need to be removed in order for this to work. That'll require a call to the web host. Once the redirect has been removed, internal users will be able to browse to the site at www.abc.com as long as the "www" DNS record you created is accurate. (They'll always have to type www in the URL, though; that's just one of the side effects of having an AD domain with the same name as your registered domain.)
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MAS (MVE)EE Solution GuideCommented:
Enough information to confirm answer.
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