sshd/SYSTEM account/OS version and Cygwin "bitness" limitations

Thu Mar 28 21:37:00 GMT 2019

I am trying to understand the limitations when running sshd using the
SYSTEM account.
Is the following complete and correct?
==========
OS_version* OS_bitness sshd_bitness Notes
--------------------------------------------------
< 6.3 64-bit 32-bit Note 1
< 6.3 64-bit 64-bit Note 2
< 6.3 32-bit 32-bit Note 2
>= 6.3 64-bit 64-bit No problems
>= 6.3 64-bit 32-bit No problems
>= 6.3 32-bit 32-bit No problems

* "< 6.3" = "older than Windows 8.1/Server 2012 R2"; ">= 6.3" = "at least
Windows 8.1/Server 2012 R2"
Note 1: sshd cannot authenticate local accounts, but it can authenticate
domain accounts.
Note 2: sshd can't authenticate local accounts after a reboot unless
another logon happens first.
Unfortunate implication of Note 1: 32-bit version of sshd running as SYSTEM
account on OS < 6.3 on non-domain member computer cannot authenticate any
accounts.
==========
Thanks!
Bill
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