So I figure that I can find out whether to use a proxy by looking at IE's proxy settings. How do I go about this? More specifically: Is there one set of "proxy settings" in Windows, used by all browsers (probably IE's), or would I have to write different routines for IE, Firefox, Opera, etc?
Free Proxy List - Just Checked Proxy List Our proxy list service supports all systems, including Windows, Mac, Linux, Android, and iOS. You can use our API URL to get the proxy list on all systems. Windows users can use our free App to get and test the HTTP proxy lists. You can custom the output format of the proxy list using our API. Our proxy lists are updated every 30 minutes. How to find my computer proxy server and proxy port number Apr 15, 2018 Proxy auto-config - Wikipedia Automatic proxy selection: Specify a host-name and a port number to be used for all URLs. Most browsers allow you to specify a list of domains (such as localhost) that will bypass this proxy. Proxy auto-configuration (PAC): Specify the URL for a PAC file with a JavaScript function that determines the appropriate proxy for each URL. What is a Proxy Server and How Does it Work?
Nov 09, 2018
If you do not need to use a proxy to connect to internet then try to select "No Proxy" if "Use the system proxy settings" or one of the others do not work properly. See "Firefox connection settings":
How can I find out which proxy server is used in Ubuntu
Internet Explorer Uses Proxy Server for Local IP Address Apr 16, 2018 Proxy Check | IP Location Proxy Check is a free IP tool which allows you to determine if you're beine a proxy server. If detected, the tool provide details of your proxy server.