Proxy server Settings

If your computer is connected to a local network that’s protected from the Internet by a firewall, you may need to specify proxy servers or use the FTP passive mode (PASV) to access some Internet sites. A proxy server is a computer on a local network that acts as an intermediary between a single computer user and the Internet so that the network can ensure security, administrative control, and caching service.
- Choose Apple menu > System Preferences, then click Network.
- Select the network service you use in the list—for example, Ethernet or Wi-Fi.
- Click Advanced, then click Proxies.
- If you configure your proxy server settings automatically, select Auto Proxy Discovery to automatically discover proxy servers, or select Automatic Proxy Configuration if you’re using a proxy auto-configuration (PAC) file. If you select Automatic Proxy Configuration, enter the address of the PAC file in the URL field. Check with your network administrator if you need more information.
- If you configure your proxy settings manually, do the following:
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Select a proxy server, such as FTP Proxy, then type its address and port number in the fields on the right.
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Source: support.apple.com
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