[CentOS] ssh -X versus -Y
Gordon Messmer
gordon.messmer at gmail.com
Sun Jul 5 19:23:39 UTC 2015
On 07/05/2015 04:51 AM, Liam O'Toole wrote:
> One practical difference I have seen is the improved performance of -Y
> over -X. I have long attributed that to the relaxation of security
> controls in the former case.
When and how did you measure that?
The -Y change was introduced in Fedora Core 3, in November 2004. The
default was changed to ForwardX11Trusted=yes just a month or two later.
I'm not sure -X and -Y ever behaved differently on Enterprise Linux or
CentOS.
At this point, I don't think it's even possible to set
ForwardX11Trusted=no any more. The X SECURITY extension was replaced
with "X Access Control Extension" several years ago.
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