ssh -L forward multiple ports

The -L option can be specified multiple times within the same command. Every time with different ports. I.e. ssh -L localPort0:ip:remotePort0 -L localPort1:ip:remotePort1 ...

Exactly what NaN answered, you specify multiple -L arguments. I do this all the time. Here is an example of multi port forwarding:

ssh remote-host -L 8822:REMOTE_IP_1:22 -L 9922:REMOTE_IP_2:22

Note: This is same as -L localhost:8822:REMOTE_IP_1:22 if you don't specify localhost.

Now with this, you can now (from another terminal) do:

ssh localhost -p 8822

to connect to REMOTE_IP_1 on port 22

and similarly

ssh localhost -p 9922

to connect to REMOTE_IP_2 on port 22

Of course, there is nothing stopping you from wrapping this into a script or automate it if you have many different host/ports to forward and to certain specific ones.

Hope this helps.