topic Xterm in Operating System - HP-UX

Xterm

sujeet joshi — Sun, 20 Aug 2006 07:26:09 GMT

Hi,

After changing my server ip in hp9000 hpux11i server,I am facing one problem .

I am not able to connect remotely from xmanager.
I am getting following error.
xterm Xt error: Can't open display: %s

is it any FW issue?

Please help me .

Sujeet

Re: Xterm

RAC_1 — Sun, 20 Aug 2006 07:32:17 GMT

If there is a filrewall between PC and hp-ux machine, some ports need to be opened. Does it work when you set display to your PC's ip address. Also does nslookup work on ip address and on host name?

Re: Xterm

Steven E. Protter — Sun, 20 Aug 2006 07:55:14 GMT

Shalom,

Could be a firewall, could be the font server.

vi /etc/rc.config.d/xfs
set first variable to 1 so the font server auto starts. This is not the default for HP-UX

/sbin/init.d/xfs

Too check for firewall issues:
tail -f /var/adm/syslog/syslog.log

Then try an X connect. You should see some network activity. If not, check the firewall.

You may need to install and use tcpdump to check network activity.

SEP

Re: Xterm

Bill Hassell — Sun, 20 Aug 2006 12:12:24 GMT

You are using some sort of automatic Xwindow connect software and the %s is supposed to be set to your display's IP address. Since there are so many Xwindow emulators and methods to connect automatically, start by manually starting an xterm window. Assuming you are on a PC or perhaps a Linux box, remember that xterm runs on the remote HP-UX machine so you first have to telnet to the HP-UX machine. Once you are connected, verify that your local IP address is the same as reported by the command

who -muR

If it does not, there is some sort of address translation taking place. Now it gets tricky. From the HP-UX machine, check that you can ping back to your PC. If not, you'll need help from your network administrator. If the address is the same as your PC, then set the DISPLAY variable to that address with :0 appended as in:

export DISPLAY=12.34.56.78:0

Now start xterm on the HP-UX box. It should connect to your local Xwindow emulator. If not, your network may disallow port 6000 connections. Another common problem is your local PC's firewall may disallow Xwindcow connections. This is fairly comon since Xwindows is an external protocol.

Re: Xterm

John_Hancock — Sun, 20 Aug 2006 23:43:20 GMT

By default OOB HP-UX will only allow X windows to display locally. To allow remote display you will need to run the xhosts command. This is a security feature. To allow display to all hosts use "xhost +" or to individual displays "xhost + hostname" and to display the status xhost without options.

One you do this set the DISPLAY variable as per aove and it should all work.

Re: Xterm

GBR — Mon, 21 Aug 2006 08:06:18 GMT

Using the command "xhost +" on your client machine is more of a security risk than "xhost + hostname" since any host can display to your machine. I recommend using "xhost + hostname".

Goodluck,
GBR