I have a problem with our 2 branches accessing http port. Let's say Site B can't access the web server in Site A but Site A can access the web server in Site B. In site A we have Cisco 2811 Router and a Cisco 3560 Core Switch, on site B we have a Cisco 1841 router that is connected to ordinary switch. In both routers all ip route and network route has been properly declared. We have a Call Manager Server in site A and an IP Phone in site B can successfully connect to the CCM server. My only problem is accessing the web servers in site A.
By checking the http logs on our web servers I found out that the request from site B has reached on the web server but the reply of the web server will not reached site B.
Can you give me any help guys? All answers are highly appreciated and properly rated.