openssh

• June 26, 2016 Granting Temporary Access to Your Servers (Using Signed SSH Keys)
• January 31, 2016 moul/awesome-ssh
• March 27, 2015 Is SSH ControlMaster with Cygwin on Windows actually possible? - Stack Overflow
• February 9, 2015 linux - SSH multi-hop connections with netcat mode proxy - Server Fault