I am testing proxy pac file failover using IE 9.0.8112 and testing three choices using an automatic configuration file. I shut down the first proxy to test the fail over to the second. Firefox 20.0.1 and chrome work correctly, but IE 9.0 does not. My snip-it is as follows:
return "PROXY 192.168.11.12:8080; PROXY 192.168.11.195:8080; DIRECT";
With ie8, firefox and chrome the fail over to the next proxy entry during a PROXY 192.168.11.12 fail over works correct and as follows:
Proxy 192.168.11.12 times out after about 25-30 seconds and then proxy 192.168.11.195 is attempted and the web page is displayed.
Then all url lookups after this time are made through proxy 192.168.11.195 and are quick. This is how proxy fail over should work.
When I test with ie9 it works as follows:
Proxy 192.168.11.12 times out after about 25-30 seconds and then proxy 192.168.11.195 is attempted and the web page is displayed.
Then all following url lookups take 30 -45 seconds because it always tries the first PROXY 192.168.11.12 first before attempting proxy 192.168.11.195
because it does not remember first Proxy 192.168.11.12 is not available.
Is there a setting or bug opened on this behavior????