OT: how to make a ssh/showmount usable with no internet

From: Aryeh Friedman <aryeh.friedman_at_gmail.com>
Date: Fri, 14 Jul 2023 14:28:56 UTC
Due to some t-storms my internet is up and down like nuts today but
the upshot is it seems that even local ssh requires a reverse DNS
lookup and thus has a very long hang before connecting.   How can I
prevent this behaviour

Additional question: what additional steps do I need to make the
system completely separable from the internet (I already ran into
reverse DNS issues with showmount).   (I use NFS but not NIS for most
stuff)

-- 
Aryeh M. Friedman, Lead Developer, http://www.PetiteCloud.org