--- xdm/config/Xservers.ws.in.orig	2018-06-18 14:31:07.227964637 +0000
+++ xdm/config/Xservers.ws.in	2018-06-18 14:31:38.378048397 +0000
@@ -9,4 +9,4 @@
 XCOMM look like:
 XCOMM	XTerminalName:0 foreign
 XCOMM
-:0 local BINDIR/X :0 DEFAULTVT
+:0 local BINDIR/X :0 DEFAULTVT -nolisten tcp