On Wed, 15 Oct 2003, Robert Chong wrote:
> Now I've got questions regarding security. It seems to
> me that someone could use X Windows to spy on what I'm
> doing on my laptop. Is there any settings in XFree86 I
> can adjust to prevent any snooper? I also have a
> ZoneAlarm firewall installed. Are there any ports I
> should set rules to block? In UNIX, I can use "xhost -
> 'hostname'" to remove the remote host from access
> control list, but the Free86/xhost command doesn't
> seem to have such option. Is there any other command
> that can do this?
XFree by default does not allow connections from remote
hosts. You have to enable this explicitly with xhost +
or xhost hostname.
To prevent all conncections from external hosts you have
to prohibit network connections to port 6000+x where x is
the display number.
see also man Xsecurity
bye
ago
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