What options can be put into a SSH authorized_keys file?

Solution 1:

All options are detailed in the sshd(8) man page; search for AUTHORIZED_KEYS FILE FORMAT.

At the moment, those options are:

• cert-authority
• command="command"
• environment="NAME=value"
• expiry-time="timespec"
• from="pattern-list"
• no-agent-forwarding
• no-port-forwarding
• no-pty
• no-user-rc
• no-X11-forwarding
• permitlisten="[host]:port"
• permitopen="host:port"
• principals="principals"
• restrict
• tunnel="n"

Solution 2:

Check 'man sshd' on your local unix-ish box for more info. My osx box has the following:

• command="command"
• environment="NAME=value"
• from="pattern-list"
• no-agent-forwarding
• no-port-forwarding
• no-pty
• no-user-rc
• no-X11-forwarding
• permitopen="host:port"
• tunnel="n"