Are you talking about the wired address for your gateway node? Since by default that is assigned via DHCP, it will vary and change. Some options:
1. Set a static address by creating a STATIC file – info in the wiki 2. if your wired private subnet is 192.168.0.x, if you ping 192.168.0.255, the linux box will respond with it’s IP address. 3. You can use a scanner tool (Angry IP scanner http://www.angryziber.com/ipscan/) to scan for open port 22.