• A tool for tunneling SSH through HTTP proxies
• Сервис stunnel
• PAM basic аутентификация доступа к SQUID

# apt install corkscrew

# cat ~/.ssh/myauth

user1:password1

# cat ~/.ssh/config

host *
    #ProxyCommand corkscrew 172.16.1.13 3128 %h %p
    #ProxyCommand corkscrew 172.16.1.13 3128 %h %p ~/.ssh/myauth
    ProxyCommand corkscrew 127.0.0.1 3128 %h %p ~/.ssh/myauth