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SSH ControlMaster: The Good, The Bad, The Ugly

By | Technical | 6 Comments

Do you love SSH for the good it has done for mankind, but get annoyed by how long it takes to establish a connection over a high-latency connection? Perhaps you have a process that needs to make thousands of SSH connections, and you’d like a little extra speed from the whole thing. Either way, ControlMaster is your new best friend. The concept is very simple — rather than each new SSH connection to a particular server opening up a new TCP connection, you instead multiplex all of your SSH connections down one TCP connection. The authentication only happens once, when the TCP connection is opened, and thereafter all your extra SSH sessions are sent down that connection. If you’re SSHing between machines on the same LAN, or otherwise a short…

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A great Windows FTP & SFTP Client

By | Technical | No Comments

A question I get asked reasonably often is “Do you know any good free FTP programs?” Yes, I do. It is WinSCP. Some of the cool features are: It does what it is designed to do and does it excellently. SFTP, SCP & FTP support (ditch FTP and use SFTP!) I’ve never seen it crash. Transfer resuming on broken and cancelled downloads. Supports SSH keys, so you do not need to remember another password. Scripting support; schedule your own remote backups or have sane website rollout procedures! The WinSCP site describes it as “WinSCP is an open source SFTP client and FTP client for Windows. Its main function is the secure file transfer between a local and a remote computer. Beyond this, WinSCP offers basic file manager functionality. It uses…

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