[SSHGuard-users] key exchange ssh not being blocked

[<li...@la...>]

sshguard 1.7 is not catching key exchange ssh hacks. The number of
fools attempting such a hack is small, but some are persistent. I've
been blocking them by hand.

# uname -a
FreeBSD theranch 10.3-RELEASE-p18 FreeBSD 10.3-RELEASE-p18 #0: Tue Apr 11 10:31:00 UTC 2017     ro...@am...:/usr/obj/usr/src/sys/GENERIC  amd64
# 

# pkg version -v | grep ssh
sshguard-ipfw-1.7.1                =   up-to-date with index

auth.log.0.bz2:May 24 20:37:06 theranch sshd[60250]: fatal: Unable to
negotiate with 172.81.185.192 port 50267: no matching key exchange
method found. Their offer: diffie-hellman-group1-sha1 [preauth]