I'd like to use sftp to connect to a system on the outside but have to go through an HTTP proxy. When I try to connect, I get an error back from the proxy server saying Authentication is required. nc: Proxy error: "HTTP/1.1 407 Proxy Authentication Required" ssh_exchange_identification: Connection closed by remote host The question is: How/where do I specify the userid/password for this authentication? I added this line to my ~/.sh/ssh_config file for the appropriate outside host: ProxyCommand /usr/bin/nc -v -X connect -x <my Proxy Server Address>:443 %h %p If it's any help, I can use puTTY to connect to to other outside systems, and I go through that same proxy/port. In putty I specify my proxy userid/password and all is well. How do I get sftp to do that too? I've read through man 5 ssh_config and just don't see it... and I also do not see anything in man nc :-( Any help is appreciated. Thanks,