cmc

cmc makes SSH ControlMaster sessions easy. SSH ControlMaster sessions have the following benefits:

When using a SSH Bastion, you will only be prompted for (two-factor) authentication once.
- Hosts behind the SSH Bastion can be accessed "directly" by proxying through the SSH Bastion (see workflow).
Sessions to or through ControlMaster hosts do not need to create a new connection (SSH will be faster for most tasks)

Script Help

Usage:  cmc [ -c HOST | -o HOST | -x HOST ]
        cmc [ -L | -l | -O | -X ]
        cmc -h

ControlMaster Controller - Eases management of SSH ControlMaster connections

Options:
    -h      show this help message and exit
    -c HOST check HOST ControlMaster connection status (maybe specified more
            than once)
    -L      list ControlMasters defined in SSH_CONFIG
    -l      list ControlMaster connection sockets matching ControlPath and
            check their connection status
    -O      open all ControlMasters defined in SSH_CONFIG
    -o HOST open a ControlMaster session (maybe specified more than once)
    -x HOST exit ControlMaster session (maybe specified more than once)
    -X      exit all ControlMaster connections with sockets matching
            ControlPath

Notes:
    • Any unused sockets in ControlPath are removed with -l and -X
    • Only a single ControlPath should be specified

Install

Download cmc and ensure it is in your PATH.

Documentation

Workflow

See docs/workflow.rst

Annotated SSH Configuration

See docs/annotated_config.rst

Related

mac-ssh-confirm: Protect against SSH Agent Hijacking on Mac OS X with the ability to confirm agent identities prior to each use
gacli: Mac CLI Google Authenticator client (ex. for use with SSH Bastions that utilize Google Authenticator)

Requirements

*nix Operating System with
- core utilities (awk, find, grep, ps, and sed)
- GNU Bourne-Again Shell 3.0 or later (bash)
- OpenSSH 4.0 or later (ssh)

License

LICENSE (MIT License)

License

mlevin2/cmc

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