OpenSSH 是 SSH （Secure SHell） 协议的免费开源实现。它用安全、加密的网络连接工具代替了 telnet、ftp、 rlogin、rsh 和 rcp 工具。OpenSSH 支持

				#	$OpenBSD: proxy-connect.sh,v 1.5 2002/12/09 15:28:46 markus Exp $				#	Placed in the Public Domain.								tid="proxy connect"								for p in 1 2; do					${SSH} -$p -F $OBJ/ssh_proxy 999.999.999.999 true					if [ $? -ne 0 ]; then						fail "ssh proxyconnect protocol $p failed"					fi					SSH_CONNECTION=`${SSH} -$p -F $OBJ/ssh_proxy 999.999.999.999 'echo $SSH_CONNECTION'`					if [ $? -ne 0 ]; then						fail "ssh proxyconnect protocol $p failed"					fi					if [ "$SSH_CONNECTION" != "UNKNOWN 65535 UNKNOWN 65535" ]; then						fail "bad SSH_CONNECTION"					fi				done