[ssh-l] Network tunneling [resend]

(I realized my last post had no subject, and was not viewable from the
archives, so I am resending it)

Hello ssh list,

I have been looking at a way to have 2-way connection initiation through a
firewall for multiple ports. It looks like ssh is going to do this for me, byt
do I need to have a sshd running on both machines?

Here is an example of what I want to do :

Client1 and Server1 are on opposite sides of a firewall. Client1 initiates a
connection to serviceA (port 9007) on Server 1. serviceA on Server1 in turn
needs to initiate a connection to serviceB on Client1 (port 6000 (X)). Client1
initiates another serviceC (port 9008) on Server1.

Is this done on the Client1 by simply setting up 1:1 mappings?
9007:Server1:9007 6000:Server1:6000 9008:Server1:9008 ?

Or is this achieved on both sides (with sshd running on both sides):
Client1 : 9007:Server1:9007 9008:Server1:9008
Server1 : 6000:Client1:6000

Your help is appreciated.
Thanks,
Brian

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