[Gllug] services

[itsbruce at uklinux.net]

On 11/23/01, 11:49:57 AM, will <will at hellacool.co.uk> wrote regarding Re: 
[Gllug] services:


> > I can't remember the xdm one.


> Darn, I get the feeling this the one I need.  I will have another root
> around.

Try running ps -ax.  If you see xdm in the list, that's the one.  

There are 3 things you can do:

1.  Turn off XDMCP - the chooser protocol which is used for negotiation 
between clients and x daemons.  This can be done by running xdm with 
-udpPort 0.  You'll have to edit the xdm init-script for that.

2.  Use the /etc/X11/xdm/Xaccess file (exact location may vary) to 
control which hosts can connect.

3.  It is the X server itself, rather than xdm, which runs the tcp 
connection once negotiated.  So if you stop the X server from listening 
to tcp requests that is enough.  This is done in the Xservers file 
(/etc/X11/xdm/Xservers on this debian box), which contains the line to 
invoke the server.  Mine includes the parameter -nolisten tcp.

And have a firewall that blocks unwanted connections, of course.

-- 

Bruce

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