Can't open display -- SOLVED

[Paul Howarth]

Paul Howarth wrote:
> William Hooper wrote:
> 
>> Paul Howarth wrote:
>> [snip]
>>
>>>> Perhaps a -Y flag is required.
>>>> I'm not sure what "trusted X11 forwarding" means.
>>>>
>>>
>>> There's a brief mention of it in "man ssh_config". It's not normally
>>> needed for the vast majority of apps
>>
>>
>>
>> My experience is the complete opposite.  Red Hat has even issued an 
>> Errata
>> for RHEL 4 making trusted forwarding the default.  I believe the only 
>> apps
>> I have personally seen that work with untrusted forwarding are things 
>> like
>> xeyes and xterm (as long as you don't want to copy and paste).
>>
>> Take a look at this comment from Mike Harris:
>>
>> https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=137685#c15
> 
> 
> Interesting; just this morning I was remotely administering a SuSE box 
> running yast2 over an ssh -X connection, last night I used rdesktop over 
> one and I've definitely run firefox over one in the past. I wasn't doing 
> much (any?) copying and pasting though.

D'oh!

Reading further up the list of comments in the bug report above, I see 
that the default configuration in the errata packages (which I have of 
course) is to enable trusted forwarding by default, so ssh -X and ssh -Y 
behave the same. So when I *thought* I was using untrusted mode by using 
ssh -X, I was in fact using trusted mode anyway.

Apologies for any confusion caused...

Paul.