Assuming both your TWGS and your BBS are on the same computer, you have two easy ways of doing this:
1) If you are using rlogin instead of telnet, just set up a door with the command line "*rlogin localhost" exactly as I have it at
telnet://twgs.org, without the quotes. I do it this way to force people to log in through the BBS (I also think it looks better than having it ask for a username and password a second time).
or
2) Since it sounds like you're using telnet on port 2002, you can also use "*telgate localhost:2002".
Let me know if you have anymore questions,
Herman