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From: Mike Jakubik <mike.jakubik@intertainservices.com>
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To: freebsd-stable <freebsd-stable@freebsd.org>
Subject: OpenSSH 6.5 breaks logins !
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Hello,

I just updated a box to latest stable only to find i could not log in 
via ssh after the upgrade. Luckily i have remote access to the console. 
This is the error sshd threw.

Feb 28 19:52:45 vmfbsd sshd[779]: fatal: ssh_sandbox_child: failed to 
limit the network socket [preauth]

After some searching around i found the culprit to be the new option 
"UsePrivilegeSeparation sandbox". Changing this back to yes instead of 
sandbox fixed the problem. Below are the only customizations in my 
sshd_config

PermitRootLogin yes
PasswordAuthentication yes

FreeBSD 10.0-STABLE #0 r262627

Thanks.