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Hi! The current version of sshd allows to restrict keys to issue only specific commands. However, port forwarding can only be forbidden entirely. Given the following situation: A client C uses S as a POP3 server. We want to poll E-Mail via POP3 from S to A via an ssh tunnel without being asked for a password. Thus, we create a passphrase-less key pair on A, transmit the public key to S and

hello- i would like to be able to have users access a specific set of ports (and no others) on a machine running an ssh daemon via ssh's port-forwarding. i was thinking of doing this by not providing shell access (so using an appropriate command="command" option in each user's authorized_keys file), but i did not find an appropriate keyword for the sshd configuration file