topic Re: Red Hat 9 Security and X programs from a remote host in Operating System - Linux

Red Hat 9 Security and X programs from a remote host

A. Daniel King_1 — Thu, 21 Aug 2003 11:23:35 GMT

Hi, folks.

I'm trying to get an external machine (not local) to display ANY xterm/netscape/gimp/etc. to my Red Hat 9 fresh install.

I've set DISPLAY on the remote system, I've run xhost + remote_hostname on the local system.

All I get is:

Error: Can't open display
Error: Couldn't find per display information

I've tinkered with hosts.allow (even ALL : ALL), to no avail.

Do any of you gurus have some suggestions as to why this does not work?

Thanks in advance.

Re: Red Hat 9 Security and X programs from a remote host

Alexander Chuzhoy — Thu, 21 Aug 2003 12:17:56 GMT

first of all you need to run
xhost + remote_hostname
from within X sessions terminal

on a second machine from which you wish to connect you should issue the following command
export DISPLAY=ipaddress:0

of course you should insert the Xserver ip address instead of ipaddress

Re: Red Hat 9 Security and X programs from a remote host

A. Daniel King_1 — Thu, 21 Aug 2003 12:56:00 GMT

I've done this with some variation including myip:0.0, myip:1 and others.

Any other ideas?

Re: Red Hat 9 Security and X programs from a remote host

Claudio Cilloni — Thu, 21 Aug 2003 13:19:22 GMT

did you try with simply 'xhost +' without specifing the remote machine? this will enable _any_ machine to connect to the local X server.
Just to check if it is and authorization problem.

Ciao
Claudio

Re: Red Hat 9 Security and X programs from a remote host

Paulo A G Fessel — Thu, 21 Aug 2003 14:15:24 GMT

Other elegant alternative is change the option "X11Forwarding yes" in /etc/ssh/sshd_config file of OpenSSH. This will enable X11 forwarding from sshd, with the side benefit of having X11 information encrypted and compressed through your ssh connection.

Then, use "ssh -X" to log into your RH9 server; X11 applications will work automagically on your remote X server and you won't have to bother with "xhost" and "export DISPLAY" commands.

Don't forget to assign the corresponding points.

HTH
Paulo Fessel

Re: Red Hat 9 Security and X programs from a remote host

A. Daniel King_1 — Thu, 21 Aug 2003 15:16:00 GMT

I'd rather be encrypted anyway; It works like a charm. Thanks, all!