If you use a Linux or MacOS computer and your workflow involves making a lot of connections to HiPerGator you may want to use SSH Multiplexing to avoid having to go through MFA for every connection. Again, this does not work for Windows computers natively! The BitVise and Tabby clients are the only SFTP/ssh client we are aware of that support ssh multiplexing.
In a nutshell, ssh multiplexing works by creating a TCP socket the first time a connection is made. That socket can be used by subsequent connections within the idle timeout period to create new connections without triggering MFA.
See Using SSH Multiplexing for reference.
Multiplexing with username and password
To use SSH multiplexing with your username and password (without SSH key authentication).
edit the ssh configuration file on your local computer (typically
~/.ssh/config) and add or modify the following entry. Be
sure to change the 'albertgator'
User to your username:
Host hpg User albertgator HostName hpg.rc.ufl.edu ControlPath ~/.ssh/cm-%r@%l-%h:%p ControlMaster auto ControlPersist 8h
Note: On a MacOS system, if you see a 'unix listener too long' error, you may have to create a ~/.ssh/control directory and use
in the ~/.ssh/config
~/.ssh/config changes, use this ssh command:
$ ssh hpg
NOTE: The "hpg" hostname is not a real hostname, instead it's a virtual hostname that you defined in the above configuration.
Multiplexing with SSH keys
If you are using SSH key-based authentication, add this block instead. This configures the connection to go to a different port (2222) which is expecting ssh keys:
Host hpg User albertgator HostName hpg.rc.ufl.edu Port 2222 ControlPath ~/.ssh/cm-%r@%l-%h:%p ControlMaster auto ControlPersist 8h