X11 Using TCP port 6000
 

I was playing around with nmap and noticed Port 6000 being used by X11.

Is this secure or is it not?
If not how do I stop it?

Ta,
Allan

The X window system is also a server.

this means that it offers server capabilities such as running a graphical program from another computer.

Is it secure? If your version of X11 has any security vulnerabilities, then probably, just get a recent version of X11

nmap rules!!!

you dont have to have it show up, I prefer not to.

'startx -- -nolisten tcp'

that will fix it.

I know this thread is rather old, but in the event that someone runs across it, I would like to add that you can disable port 6000 by editing the /etc/X11R6/bin/startx file

Find the line that says serverargs=""
and replace it with serverargs="-nolisten tcp"

This makes it so when you execute startx by itself without any options, it does not start the tcp server.

Hope this helps someone

Surely someone googling this would have run into one of the dozens of other threads where it's talked about, though.