Tor
https://www.torproject.org/docs/faq#torrc 通用部分 Tor opens a SOCKS proxy on port 9050 by default – even if you don’t configure one below. Set “SOCKSPort 0” if you plan to run Tor only as a relay, and not make any local application connections yourself. SOCKSPort 9050 # Default: Bind to localhost:9050 for local connections. SOCKSPort 192.168.0.1:9100 # Bind to this address:port too. Entry policies to allow/deny SOCKS requests based on