> With the “allow all” HBAC rule enabled, we have no trouble logging in to any
> machine via ssh. When we disable the “allow all” rule and make specific per-
> machine rules (as per the idea of ‘host based’ in HBAC), we get unpredictable
> results, primarily resulting in an inability to login via ssh. This result is 
> intermittent
> – sometimes we can login, but sometimes we can’t.

One noted way to "break" the HBAC is a long period of inactivity in that shell.

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