internal users can not access webservers external domain names or ip addresses

i have netscreen 5xt firewall. our webserver is behind this firewall along with all users. webserver is running fine and end users can access it through domain names or external ip address.

the problem i have is internal users can not access the web server through domain names its external ip address. i think it has something to do with the policy and i can't figure out.

any help is greatly appriciated.
cuc888Asked:
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cuc888Author Commented:
anyone there?
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cuc888Author Commented:
problem solved. thank you
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mahe2000Commented:
firewalls usually do not let users go outside by one interface and go in by the same interface and this is what is happening to you.
you need to resolve your domain internally. you have to install an internal dns server and configure your domain with the internal ip addresses there, then you have to let your internal users use this dns to resolve ip addresses  and let this dns ask others to resolve other domains.
another thing you can do is adding a record in the %SystemRoot%\system32\drivers\etc\hosts file of every machine with the domain name and the ip address, it will work but it is not a good idea.....
the record would be:
<ip address> <domain name>

run ipconfig /flushdns after changes to purge the cache.
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cuc888Author Commented:
dns was not the problem but my IIS configuration on the web server was wrong.
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