freebsd stable - Mar 2015 - SSH hung with an OpenSSH_6.6.1p1 --> OpenSSH_5.8p2_hpn13v11

Yep. I'm upgraded  via freebsd-update. and I have no idea where i'm
wrong either.:-[
Is it likely I have no luck in other words?
? 2015/03/26 22:16, Mike Tancsa ??:
> On 3/26/2015 2:44 AM, Wu ShuKun wrote:
>>     greeting!
>>     ssh connection failed by using a new version SSH to and old one.
>> Below is the symptoms which on a same network.
>> Connection is Okay with old version SSH
>> %ssh -V
>> OpenSSH_5.4p1 FreeBSD-20100308, OpenSSL 0.9.8q 2 Dec 2010
>> OpenSSH_6.6.1p1, OpenSSL 1.0.1l-freebsd 15 Jan 2015
>> % ssh -v 10.41.172.19
>> OpenSSH_6.6.1p1, OpenSSL 1.0.1l-freebsd 15 Jan 2015
>
>
> Is it possible this user somehow got a package or port, or binary
> upgrade somehow built with OpenSSL when it was briefly broken between
> r280266 and r280274 ?
>
> (Trimming the other lists from this thread)
>
>     ---Mike
>
>
>
>

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On 03/26/15 17:30, Wu ShuKun wrote:
> Yep. I'm upgraded  via freebsd-update. and I have no idea where
> i'm wrong either.:-[ Is it likely I have no luck in other words?
Can you try specifying -o "KexAlgorithms
diffie-hellman-group-exchange-sha1" when ssh'ing and see if that would
mitigate the problem?

My gut feeling is that somehow the HPN patch have broke certain key
exchange negotiation steps of OpenSSH, which was not exercised in
earlier versions of FreeBSD due to the lack of ECDH key exchange?

Cheers,
- -- 
Xin LI <delphij at delphij.net>    https://www.delphij.net/
FreeBSD - The Power to Serve!           Live free or die
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