The "just point them" part might be a bit misleading. It is a bit more work. You need to start X server on the client (not the XDMCP manager) and instruct it to connect to the server. Do "man Xserver" and look at XDMCP section. Options that are of interest to you are "-query" to get login from specific hostname, "-broadcast" to do broadcast on the network and present list of available XDMCP servers, and "-indirect" to connect to specific hostname and have XDMCP server on that host present list of available servers. Also, make sure X server on the client PC is not started with "-nolisten tcp" (default on Linux). You do want it to listen on TCP, so that applications from the server can connect to user's display to open windows.
BTW, Just looking at the gdm config file. Seems that if you are running that one, you can enable chooser button, so that user's can either login locally, or remotely using XDMCP. Nice. In that case, you'd be running gdm on client box, and let it handle everything (instead of manually starting X server with -query or -indirect).
-- Aleksandar Milivojevic <amilivojevic@xxxxxx> Pollard Banknote Limited Systems Administrator 1499 Buffalo Place Tel: (204) 474-2323 ext 276 Winnipeg, MB R3T 1L7
