DI-524 router problem

Hello all,

I recently bought D-link (DI-524) router and I have following problem. I setup the network and its running smoothly no problem.. but there is a minor problem that I need to solve. Users can access each other documents etc. but they cannot access each other trough web browser using IP address. One of users have apache and php installed and others are ought to access that user and collect data from it trough web browser. any ideas what might solve this problem. the website above shows 100 % same as router configuration interface. thank you

Both Windows and desktop Linux distributions typically have packet filtering ("firewall") enabled on the ethernet port, blocking access to things like port 80.

Is your router doing NAT?