Hello. 

Just a quick head up.... Today we update a FreeBSD 11.2 to 12.0 machine
and our SSHD got broken. 

The problem is with HMAC line in the config file, specifically the
hmac-ripemd160 value. It was legit in 11.2 (and I suspect
default-enabled for a previous FreeBSD version because never in the
world we would change that line - I don't even knot what's for) but it
doesn't work anymore in 12.0. 

So as a check, before upgrading check your /etc/ssh/sshd_config. 

-- 

Andrea Brancatelli
Schema31 S.p.a.
Chief Technology Officier

ROMA - FI - PA 
ITALY
Tel: +39.06.98.358.472
Cell: +39.331.2488468
Fax: +39.055.71.880.466
Società del Gruppo OVIDIO TECH S.R.L.
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