: SOCKS4 requires a user_id but does not support the advanced authentication methods found in SOCKS5.
The SOCKS4 protocol is a "sans-I/O" protocol used to exchange packets between a client and server through a proxy. Download File socks4.txt
: It generally requires an IP address and port; it does not natively support domain name resolution (which was later added in SOCKS4a). : SOCKS4 requires a user_id but does not