xterm error question

[Aaron Cline]

Goij:

Let me get this straight:

HostA and HostB are Linux boxes?

HostA and HostB are on the same network and not separated by a firewall?

You want to run an app on HostB and redirect the output to HostA, but 
when you log into HostB and do export DISPLAY=xxx.xxx.xxx.xxx:0.0 and 
then run the app you get nothing (you also do a xhost + on HostA 
previous to running the app).

You currently cannot telnet or ssh from HostB to HostA?
You currently CAN telnet from HostA to HostB, what about ssh?
If you can ssh from HostA to HostB, try the 'xhost +' on HostA then 'ssh 
-X user at HostB' , then run the app on HostB.
ssh -X should work even if you are separated by a firewall, but export 
DISPLAY will not.

A Cline

GoijI P wrote:

> just found out telnet to hostA from HostB fails.
> could this be cause of xterm failure?.
> i checked some settings , not sure why telnet from hostB
> to hostA fails but other way it works. same thing with ssh.
>
>
>> From: Aaron Cline <acline2 at cox.net>
>> Reply-To: Getting started with Red Hat Linux 
>> <redhat-install-list at redhat.com>
>> To: Getting started with Red Hat Linux <redhat-install-list at redhat.com>
>> Subject: Re: xterm error question
>> Date: Tue, 20 Apr 2004 17:28:25 +0100
>>
>> Also, the portmapping service must be turned on.  
>> '/etc/init.d/portmap start'
>>
>> You can also try 'xhost +' on HostA, then 'ssh -X hostb', and finally 
>> run the app on HostB.
>>
>> ssh -X sets up X-Forwarding to go through the ssh tunnel automagically.
>>
>> GoijI P wrote:
>>
>>> did ,xhost +, on HostA:
>>> access control disabled,
>>> clients can connect from any host
>>>
>>> did , echo $DISPLAY, on HostA:
>>> :0.0
>>>
>>> did, echo $DISPLAY, on HostB:
>>> HostA:0.0
>>>
>>> tried setenv with HOSTAIP:0.0
>>> ,still came with same xterm error.
>>>
>>>
>>>> From: Rick Stevens <rstevens at vitalstream.com>
>>>> Reply-To: Getting started with Red Hat Linux 
>>>> <redhat-install-list at redhat.com>
>>>> To: Getting started with Red Hat Linux 
>>>> <redhat-install-list at redhat.com>
>>>> Subject: Re: xterm error question
>>>> Date: Mon, 19 Apr 2004 17:10:56 -0700
>>>>
>>>> GoijI P wrote:
>>>>
>>>>> from host A, did:
>>>>> telnet HostB
>>>>> setenv DISPLAY HostA:0.0
>>>>> In another terminal on HostA terminal did: xhost +
>>>>> in telnet session terminal did: xterm
>>>>> got this error:
>>>>> xterm Xt error.
>>>>> can't open display HostA:0.0
>>>>>
>>>>> HostB is NIS client.
>>>>>
>>>>> /etc/hosts and /etc/passwd files look ok
>>>>> on NIS server and client.
>>>>
>>>>
>>>>
>>>> Are you certain the display name is HostA:0.0?  Sometimes they're just
>>>> HostA:0 (no decimal point).  On HostA, "echo $DISPLAY" and make sure
>>>> HostB uses that ID.  You may also need to specify it via IP address
>>>> unless "HostA" resolves via DNS or /etc/hosts files.
>>>> ----------------------------------------------------------------------
>>>> - Rick Stevens, Senior Systems Engineer     rstevens at vitalstream.com -
>>>> - VitalStream, Inc.                       http://www.vitalstream.com -
>>>> -                                                                    -
>>>> -  You know the old saying--any technology sufficiently advanced is  -
>>>> -               indistinguishable from a Perl script                 -
>>>> -                                 --Programming Perl, 2nd Edition    -
>>>> ----------------------------------------------------------------------
>>>>
>>>>
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>>
>>
>>
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