How does one add a port forward to an openSSH live connection?

[Jake Pollmann]

> Once I have made the connection, is there a way to signal the ssh process to
> add an additional port forward, similar to Putty?

SSH to the host
Type ~C to enter a barebones "command line".
-L [bind_address:]port:host:hostport

You can also type help at the ssh> prompt for the syntax and also see
that -KR will cancel a remote forward.

HTH,

Jake Pollmann