I have a strange problem with several users complaing about our internet hanging up/freezing/timing out occasionally. I used IE and firefox to check it out myself. I recently installed ISA 2006 as a web cache / proxying server so i dont know if that is causing any problem. When i am browisng any website it works perfect but after a while it just doesnt seem to respond. Only way to work it again is either stop it and then refresh it or close the brower and open it again.Strangely it will work fine again.
I have tried several things to eliminate the cause.
1.Used proxy (ISA) : Result:- Same
2.Direct connection: Result:- Same
3.Add several more forwarders to out DNS server: Result:- Seem to work fine for a day and again same result.
Now i cant figure out if its our ISP or is it the proxy server or is that packets are getting dropped over the network or is it our router .The router we use is Netgear FVX 538.
Any suggestions please????