can't access websites locally

Hi everyone,
I'm have one problem.

I have about 10 sites on my server and everything is working great, but I can't access them locally ( in my network ) just from other computers that is not in my network.

Server connected to internet via router. Router is configured as DMZ to server.
When locally I try to connect to one of my site using www.xxxxx.xxx browser redirecting me to router control panel but not to the site. How can I solve this problem?

 

Looks as if your router doesn't support loopbacks.

 

so I can't fix it?

 

If you have a spare router, try that one to see if it helps.

You can also check if there's a firmware update for your current router.

 

what we do in our office is set the internal dns server to point to the web sites using the internal ip address because of the same problems you have