Proxy server - ArchWiki - Arch Linux
wiki.archlinux.org › title › ProxyChoose Manual Proxy Configuration, and set the SOCKS Host (and only this one, make sure the other fields, such as HTTP Proxy or SSL Proxy are left empty). For example, if a SOCKS5 proxy is running on localhost port 8080, put 127.0.0.1 in the SOCKS Host field, 8080 in the Port field, and validate.