Hello, I hope I explain my situation clear enough for all to understand.
I am running an internet cafe with 1 server and 5 clients through ethernet. The server is a AMD Athlon 700MHZ, ASUS P5MB, 256MB RAM, 20GIGsHD, Windows 2000 Server. The Clients are same setup except they are 500MHZ and WINDOWS XP HOME & PROFESSIONAL. Some have Realtek 10-100 and another unidentfied branded NICs and to connect them all a LINKSYS EZXS16W 16Port Workgroup Switch. All Clients and Server have the PROXY enabled with my GATEWAY as the PROXY IP and PORT 9877.
My internet provider is through a Broadband VSAT connection. My VSAT Modem is a Gilat 360 and is plugged into the Server which has an additional NIC for this purpose.
To share my internet connection to the clients I have used ICS for a while and recently disabled and setup NAT. I can access the internet from all 5 clients.
Now for my problem..... Ocassionally I will experience a message "Page Cannot Be Displayed" on one or more of the client computers while using Internet Explorer to access any sites such as www.yahoo.com
. If I try to refresh the page or retype the website I still get the message. I can try accessing the same site on another client at the same time and the page will come up.
Now if I continue REFRESHING the page it will eventually load or if I disable the proxy and set it to direct connection on the client that was experiencing the problem the page will allways load. I figure that it has to do with a CLIENT not being able to get through to the PROXY, or the SERVER not allowing ACCESS to the PROXY because when I disable it on the CLIENTS everything is fine. Also I can surf fine on my server computer with the PROXY enabled however their were times (about 20min) when I could not access any sites on any computers (server included) through the PROXY but could access without it. When I phoned the ISP they said their were problems with the PROXY at that time.
I suppose that it cannot be a fault with my ISP's PROXY server when I can access websites on some clients and not others. I would leave the proxy off and use direct connection but their is a great reduction in speed and at certain times of the day pages would take longer than dialup to load.
I cannot seem to find a pattern on the time this would affect certain clients and whats strange to me is that sometimes everything is working fine for hours and all of a sudden pages cannot be displayed on one or two clients and it is never the same one they all experience it. Is their a problem with NAT/ICS routing to the PROXY? Could it be that I have configured my CLIENTS incorectly to work with NAT?