On Sun, Aug 07, 2016 at 08:34:55PM +0300, Andrey Chernov wrote:

> On 07.08.2016 20:31, Andrey Chernov wrote:
> > On 07.08.2016 19:14, Bruce Simpson wrote:
> >> On 07/08/16 15:40, Warner Losh wrote:
> >>> That’s a cop-out answer. We, as a project, need to articulate to our
> >>> users, whom we care about, why this rather obnoxious hit to usability
> >>> was taken. The answer must be more complete than “We just disabled
> >>> it because upstream disabled it for reasons we’re too lazy to explain
> >>> or document how to work around"
> >>
> >> Alcatel-Lucent OmniSwitch 6800 login broken (pfSense 2.3.2 which
> >> accepted the upstream change, workaround no-go)
> >>
> >> [2.3.2-RELEASE][r...@gw.lab]/root: ssh -l admin
> >> -oKexAlgorithms=+diffie-hellman-group1-sha1 192.168.1.XXX
> >> Fssh_ssh_dispatch_run_fatal: Connection to 192.168.1.XXX port 22: DH GEX
> >> group out of range
> >>
> > 
> > DH prime size must be at least 2048, openssh now refuse lower values.
> > Commonly used DH size 1024 can be easily broken. See https://weakdh.org
> > 
> diffie-hellman-group1-sha1 use DH 1024 and insecure sha1 both.

IMHO, this is wrong choise: totaly lost of control now vs teoretical
compromise of control in the future.
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