The local DNS you use in China is probably contaminated and popular sites like Google, Facebook, etc. are not interpreted correctly. So if you are in China and use Firefox with Proxy, make sure to set network.proxy.socks_remote_dns to be true (follow steps below).

1. Open an empty tab in …

It is recommended that you use pip to install Python packages.

1. If you don't already know the proxy in use (in your company), read the post Find out Proxy in Use to figure it out.

2. Set proxy environment variables.

   set http_proxy=http://user:password@proxy_ip:port
   set https_proxy=https://user …

1. If you don't already know the proxy in use (in your company), read the post Find out Proxy in Use to figure it out.

2. Put the following lines into your wget configuration file, which is usually ~/.wget.

   use_proxy = on
   http_proxy = http://username:password@proxy_ip:port
   https_proxy = http://username:password@proxy_ip …

Here is a good article on Git Behind a Proxy or Firewall.

1. If you do not already know the proxy in use (in your office), read the post Find out Proxy in Use to figure the proxy (in your office).

2. Run the following commands in terminal or Windows command prompt …

1. Using a Web Service.

   1. Open http://wpad/wpad.dat.

   2. Figure the proxy out from the contents it returns.

2. Use the command netstat. This is a universal way and is especially helpful when http://wpad/wpad.dat is not available.

   1. Inspect the output of netstat -an | egrep "EST|Proto" ("EST" is …