OpenSSH changes between 10.2 and 10.3 ...

[Daniel Kalchev]

host *
        KexAlgorithms diffie-hellman-group1-sha1

in ~/.ssh/config works for me.

Daniel 

> On 14.04.2016 г., at 12:44, Patrick M. Hausen <hausen at punkt.de> wrote:
> 
> Hi, all,
> 
> minor problem/annoyance here:
> 
> root at noc:/etc/ssh # ssh admin at 10.4.0.62
> Unable to negotiate with 10.4.0.62 port 22: no matching key exchange method found. Their offer: diffie-hellman-group1-sha1,none
> root at noc:/etc/ssh # uname -a
> FreeBSD noc.pluspunkthosting.de 10.3-RELEASE FreeBSD 10.3-RELEASE #3: Wed Apr 13 14:46:57 CEST 2016     root at noc.pluspunkthosting.de:/usr/obj/usr/src/sys/GENERIC  amd64
> 
> Of course I was able to find http://www.openssh.com/legacy.html myself.
> 
> FreeBSD 10.2 uses OpenSSH 6.6.x while 10.3 imported 7.2.
> So far so good.
> 
> The recommended method from the document above works on the
> command line:
> 
> 	ssh -oKexAlgorithms=+diffie-hellman-group1-sha1 admin at 10.4.0.62
> 
> But if I add
> 
> 	KexAlgorithms +diffie-hellman-group1-sha1
> 
> to /etc/ssh/ssh_config, that does not change anything. Oddly enough,
> checking which algorithms are supported gives the same result
> regardless of any configuration options:
> 
> root at noc:/etc/ssh # ssh -Q kex
> diffie-hellman-group1-sha1
> diffie-hellman-group14-sha1
> diffie-hellman-group-exchange-sha1
> diffie-hellman-group-exchange-sha256
> ecdh-sha2-nistp256
> ecdh-sha2-nistp384
> ecdh-sha2-nistp521
> curve25519-sha256 at libssh.org
> 
> So, diffie-hellman-group1-sha1 is supported but not used unless
> specified on the command line? And there is no way to override that
> *globally*? This is an isolated management network with IPMI
> interfaces - we won't be getting updates for all of these machines'
> IPMI firmware ...
> 
> Am I stuck with writing shell aliases or putting the config in each and
> every user's private ~/.ssh/config?
> 
> Thanks for any hints,
> Patrick
> -- 
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> 
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