I need a reverse proxy solution for SSH

[Bond]

Hi here is a situation I have a server in a corporate data center for
a project. I have an SSH access to this machine at port 22.There are
some virtual machines running on this server and then at the back of
every thing many other Operating systems are working. Now Since I am
behind the data centers firewall my supervisor asked me if I can do
some thing by which I can give many people on Internet access to these
virtual machines directly. I know if I were allowed to get traffic on
port other than 22 then I can do a port forwarding. But since I am not
allowed this so what can be a solution in this case. The people who
would like to connect might be complete idiots.Who may be happy just
by opening putty at their machines or may be even filezilla.I have
configured an Apache Reverse Proxy for redirecting the Internet
traffic to the virtual machines on these hosts.But I am not clear as
for SSH what can I do.So is there some thing equivalent to an Apache
Reverse Proxy which can do similar work for SSH in this situation.

I do not have firewall in my hands or any port other than 22 open and
in fact even if I request they wont allow to open.2 times SSH is not
some thing that my supervisor wants.


-- 
James Bond