Setting machines to manual address with DHCP

Question

Sorry if this has been answered before, but I found the ARD Unix command to change clients to use a manual IP address with DHCP used for router and subnet. (Thanks again to Dave Sawyer!)
Here's the question, is there a way to change the machines to this setting, and have them keep their current IP addresses?
This is all in an effort to keep from having to re-add machines in ARD 2.2 after they've received a new IP. Is ARD 2.x dependent on the IP to keep track of clients? Or this there a way for it to keep track using the machine name, regardless of what the IP is?

Answer 1

Sounds to me like you're doing this wrong. No matter what, DHCP with static address is not what you want.
Comcast Business class will (or, at least, can) give you static IP addresses, so the first thing to do is check whether you do have static addresses or not, and if not decide whether you want them.
Then you should look to seutp your server on a private LAN connected to the Comcast box via a NAT router (as shipped from Comcast, their router is more of a bridge, and they don't give you access to the router maintenance page (at least, they didn't last time I dealt with them).
So what you need is some device between Comcast and your server. There are any number of boxes, from a variery of vendors that will work. The'll take the public IP address (either DHCP or static) from Comcast and connect that to your private LAN. Once you have a private LAN you can (and should) setup your server manually, with a static IP address in your private LAN.