Setting up SSH Authman - for server owners

Learn more about the SSH Authman service
View the referenced scripts and other configuration options
If you want to use authman off-campus, please submit a request for external access to rt-ist-iss-general@rt.uwaterloo.ca

Step-by-step guide

Select a script option, either python or bash with or without cache

Create ssh cache directory (as root)

mkdir /var/ssh_cache
chown nobody:(root group) /var/ssh_cache
chmod 750 /var/ssh_cache

In /etc/ssh/sshd_config

Example using bash/with_cache.sh as auth_command_cache.sh

Copy the selected script to /usr/local/bin/authman_command_cache.sh

Make changes to the script

chown root:nogroup /usr/local/bin/authman_command_cache.sh
chmod 750 /usr/local/bin/authman_command_cache.sh

On Redhat systems, use nobody instead of nogroup

Ensure the following lines

AuthorizedKeysCommand /usr/local/bin/authman_command_cache.sh
AuthorizedKeysCommandUser nobody

You can put this under a match clause if you wish to restrict it to specific users/groups. For example:

Or, negate it for specific users/groups

After making modifications to /etc/ssh/sshd_config ensure that you reload the configuration. The method used depends of your system.

Please submit support requests to ist-iss-general@rt.uwaterloo.ca.