One of the added benefits of using ssh's config file is that programs like scp, rsync, and rdiff-backup automatically pick up these options also and work just as you'd expect (hope). Mitch Frazier is ...

In /etc/ssh/sshd_config you will want PermitTunnel=yes and you may need to set AllowTCPForwarding to yes, as well. The firewall may need some tweaks, too.

If you are in an environment that disallows the use of SSH and forces the use of an HTTP proxy, it is possible to use that HTTP proxy as a transport for SSH. Vincent Danen explains how to use the ...

SSH known hosts store server fingerprints to prevent security risks. Learn how to use SSH known host commands to manage entries on Linux systems.