I'll go down your list of comments, Phoenix.
Yes, Valve fixed the sv_allow_lobby_connect_only, or rather, messed it up. Initially, it was designed to
only allow players who were in the lobby to be in the server (essentially making it a super-private
room, whereas players couldn't even reconnect if they were disconnected.) Personally, it's nice to see
that gone. More trouble than it is worth.
Secondly, I did not post "rcon_password 1" in my post. it was "rcon password 1"
Correct that rcon_password command sets the remote console password to the value specified at %2.
However, rcon password "xxx" sets server password, though sv_password and password are a bit
glitchy at this point. sv_password does not work and seems disabled as of Left 4 Dead 2 launch,
though I've had little problem with the rcon password command.
The best idea is to set sv_steamgroup_exclusive to 1, which removes your server from the list,
and ergo random players cannot enter, and simply set a sv_search_key to a value that the players
in your group can remember, and enter that command to find your server.
ShastaX: Please make sure you enter commands CAREFULLY. "rcon password xxx" is a different command
entirely from "rcon_password xxx" and I urge you to never in your wildest dreams change your
rcon_password through console. If anything on that topic, I would recommend setting up administrative
levels, and never using the master rcon password from the console.
I hope this clarifies anyones confusion. Again, if anyone has any questions, feel free to post.
I've been working linux side and with valve-related game servers, and other game servers for
about 13 years.