Dmz single Ip

[faysspv () bellsouth net]

I've been kicking around the idea to setup a honeypot for some time. 
The only problem is I'm not sure how to keep my current test network
running and implementing a honeypot.  The problem is I have only one
ip address and I need to be able to access my firewall and honeypot
from the same port 22.  Any suggestions would be appreciated.