XHOST(1) UNIX Programmer's Manual XHOST(1) NAME xhost - X window system access control program SYNOPSIS xhost [+-]host ... DESCRIPTION _X_h_o_s_t is used to add and delete hosts to the list of machines X will accept connections from. This is an elemen- tary form of privacy control, since otherwise X would be willing to create windows for anyone on the internet. It is only sufficient for a workstation (single user) environment, though it does limit the worst abuses. If you want to set up hosts that you always trust, you can specify them in your login file, or you can specify the hosts in the file /_e_t_c/_X*._h_o_s_t_s, where * is the number of the display on the machine. Specifying a host name (with an optional leading plus sign) adds that host to the list; use a leading minus sign to delete a host. DECnet nodes should be specified as names with trailing ``::''. This program can only be executed on the machine the display is connected to. It is possible to remove the current host from the access list. Be warned that you can't undo this without logging out. _X_h_o_s_t with no arguments will print the current hosts allowed to access your display. FILES /etc/X*.hosts SEE ALSO X(8C), xterm(1) ENVIRONMENT DISPLAY - To find out which X you are using. AUTHOR Copyright 1985 by Massachusetts Institute of Technology. See _X(_1) for a complete copyright notice. Bob Scheifler, MIT Laboratory for Computer Science, Jim Get- tys, MIT Project Athena (DEC). Printed 1/10/87 25 January 1986 1