topic Re: XWindows without graphics device in Operating System - OpenVMS

XWindows without graphics device

Lluís Aunós — Fri, 12 Aug 2005 07:18:15 GMT

Hello,

I've an AlphaServer DS20E without graphics device, and I would like install Oracle9i (OUI needs XWindows), and run XWindows applications on a PC-Windows. Anybody knows if I can run XWindows client on my AlphaServer without graphics device?

I've installed DecWindows, enable XDM on TCPIP, but eXcursion on my PC (XDMCP - broadcast configured) doesn't view that AlphaServer as a XDMCP host.

Thank you,

Lluís Aunós

Re: XWindows without graphics device

Volker Halle — Fri, 12 Aug 2005 08:42:41 GMT

Lluis,

yes, you can create a X-Windows display from your AlphaServer to your PC without having to have a graphics adapter in the AlphaServer.

The command to manually create a display would be:

$ SET DISPL/CREA/NODE=/TRANSPORT=TCPIP

Test with:

$ RUN SYS$EXAMPLES:ICO

If you want to use XDM, you need to configure, enable and start this protcol with @TCPIP$CONFIG (needs a more recent version of TCPIP)

Volker.

Re: XWindows without graphics device

Hein van den Heuvel — Fri, 12 Aug 2005 09:31:29 GMT

Hmmm... sounds like you are going for some overkill. All you need is a definition for DEC$DISPLAY to a node which authorizes connecetion (xhost +). Always verify with decw$clock before trying oracle.

With excursion installed, I suppose I would try to create a (telnet?) window from the pc to the VMS box and then start the installer.

Maybe I am missing something?
Hein.

Re: XWindows without graphics device

Jeroen Hartgers_3 — Fri, 12 Aug 2005 10:22:42 GMT

Normal config of x-windows only without console config. You need a pc with a x windows client reflection for x of excursion (part of pathworks client).

If there is a firewall between the server and de pc you need to contacy you network administrator open al range of port's i don't know witch one

Re: XWindows without graphics device

Peter Quodling — Fri, 12 Aug 2005 17:25:37 GMT

Lluis,

absolutely, this is one of the beauties of Xwindows. Do stuff on other computers and display it on yours... At one of my clients, all of our development work happens on an ES40, but the CMS/LSE windows (and decterms) go through excursion to PC's.

q

Re: XWindows without graphics device

Rick Dyson — Sat, 13 Aug 2005 11:11:52 GMT

Someone suggested the command "xhost +" and I have to remind everyone that there are exploits in the wild that search for any X11 Server (i.e. port 6000) that has a listener and attaches to it to collect keystrokes and screen scrapes. (They are not opening a window on your display, just eavesdropping.) All they have to do is monitor/collect and can harvest passwords, etc. Without access control on your Xserver (i.e., VMS box, Linux, unix, Windows, etc.) you can allow them to connect without your knowledge. I've had numerous attempts to connect from AU and KR only recently. Our local security folks say they are seeing a steady sniffing of the X11 ports from external sources...

The reason I mention this is that every X11 server for Windows I have ever tried (KEA!X and eXcursion come to mind) have Access Control set to NONE (which is like the command on Unix/Linux of "xhost +". The DECWindows security settings in one of the drop down menu options have security "ON" by default but I know people tend to take the easy way out and plug in "* * *" or maybe "TCPIP * *" to fix a display error quickly.

Just be careful if you are playing with fire... :)

rick

Re: XWindows without graphics device

Lawrence Czlapinski — Mon, 15 Aug 2005 18:51:52 GMT

Lluis: In Excursion Control
Account: We use TCP/IP (rexec)
Applications command: We use $create/term/detach
Lawrence

Re: XWindows without graphics device

Lluís Aunós — Tue, 16 Aug 2005 05:47:56 GMT

Thanks for your responses.
I had wrong confingured eXcursion, but I solved the problem and now I can access the AlphaServer.

LluÃs

Re: XWindows without graphics device

Lluís Aunós — Tue, 16 Aug 2005 05:48:36 GMT

Thank you.