Hi Experts, I found the request for PAC was not triggered each time when using CFNetworkExecuteProxyAutoConfigurationURL. Looks like there is a cache inside, if so how can I disable that cache? like NSURLRequestReloadIgnoringLocalCacheData? Thanks in advance. Btw, so far if I update any proxy setting of the system or wait for some time, then the "cache" will be refreshed and new request will be sent when using CFNetworkExecuteProxyAutoConfigurationURL.