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11-30-2015 03:38 AM
11-30-2015 03:38 AM
DECwindows X11 forwarding over SSH
Hi community
I'm trying to setup X11 forwarding over SSH and everything seems to be working fine except for CDE/Motif. I've configured SSH on the server and I can open applications like DECterm, clock, EVE without any problems.
At the moment I use the old session manager (decw$session) but would like to get CDE working. Normally when I telnet to the server and set my display I can open it using decw$startlogin but when using ssh it doen't work
Any advice?
I've got HP TCP/IP Services for OpenVMS Industry Standard 64 Version V5.6 - ECO 4
on an HP Itanium (OpenVMS V8.3-1H1)
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11-30-2015 03:06 PM
11-30-2015 03:06 PM
Re: DECwindows X11 forwarding over SSH
> I'm trying to setup X11 forwarding over SSH [...]
I've never really made this work (or tried very hard), so I know
nothing, but ...
> [...] set my display [...]
Set it _how_, exactly? My vague impression of X forwarding over SSH
was that the SSH server set the display itself. (Unlike a Telnet or RSH
connection, which requires you (or your LOGIN.COM script) to set it.)
> [...] when using ssh it doen't work
"Doesn't work" is not a useful problem description. Actual behavior?
Actual error messages?
> I've got [...]
That's one system, apparently the X client. What's the other one
(that is, the X server -- the system with the display/keyboard/mouse)?
And how, exactly, is the SSH connection made? The command-line SSH
clients which I've seen typically have options like "-X" or "-Y" which
control if/how the X forwarding is done.
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11-30-2015 11:59 PM
11-30-2015 11:59 PM
Re: DECwindows X11 forwarding over SSH
Hi Steven
I use
set display/create/transport=tcpip/node=localhost/server=11
to set my display on VMS. The server number corresponds to the remote port that I'm forwarding in my ssh connection (In this case with server=11, I forward remote port 6011 on VMS to the X server's port 6000 to make sure it uses display :0.0)
For my X server I make use of Xming or Reflection X. I use PuTTY for windows for the SSH connection. I use the PuTTY GUI to set up the connection but the command would look like this:
putty.exe -ssh -X -R 6011:localhost:6000 <user>@<IP>
I can then open DECwindows applications without issues, but when I try to get the CDE/Motif login to work by running
mc decw$startlogin
nothing happens... No refresh on my X server display, no error message, just nothing...
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12-01-2015 03:21 AM
12-01-2015 03:21 AM
Re: DECwindows X11 forwarding over SSH
I've noticed that I can get the login to display if I open a DECterm window and then use the decw$startlogin command.
Not sure why this would work but running the command from the PuTTY terminal doesn't... does create/term/detach set some logicals that I don't know about?
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12-01-2015 12:01 PM
12-01-2015 12:01 PM
Re: DECwindows X11 forwarding over SSH
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12-01-2015 05:30 PM
12-01-2015 05:30 PM
Re: DECwindows X11 forwarding over SSH
> [...] does create/term/detach set some logicals that I don't know
> about?
show logical /output = sholog1.out
show logical /output = sholog2.out
differences sholog1.out sholog2.out
Are the "show display" data the same?
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12-01-2015 11:02 PM
12-01-2015 11:02 PM
Re: DECwindows X11 forwarding over SSH
Both the DISPLAY variables are the same
For the logicals there are small differences in things like SYS$OUTPUT and TT
"TT" = "_FTA307:" "TT" = "_FTA309:"
but I guess this is just because they are two different processes. In my ssh session I have the following define and these are not present in the DECterm that I open
"SYS$REM_ID" = "<user>(LOCA" "SYS$REM_NODE" = "<IP>::" "SYS$REM_NODE_FULLNAME" = "<IP>::"
Where <IP> is the address of the PC I'm connecting from and <user> is my username on VMS
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12-01-2015 11:06 PM
12-01-2015 11:06 PM
Re: DECwindows X11 forwarding over SSH
Hi Craig
Is there anything I can check to verify that it is the bug you described causing this behaviour?
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12-04-2015 07:33 PM
12-04-2015 07:33 PM
Re: DECwindows X11 forwarding over SSH
No idea. I just read the release notes available to anyone with patch access. If you don't have patch access, then this information is of no use to you. If you do have patch access, then you must also have a support contract, and you should be taking this up with HP.