I honestly can't trust a dedi that needs cd keys in any way ... Especially after my Halo 2 dedi got shut down. I have no clue what happened but I updated the server one day shutting it down properly according to the books and when it went back up I got an error saying "maximum # of servers exceeded... attempting to reconnect." How is 0 servers being run the "maximum."
I'd say good ol rcon password is the best way to go.
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