Machine is an HP laptop, tried making Verizon wireless "express network"
VPN, works great but with login option checked, login fails. Login also
fails if machine is connected to the public side, again VPN works fine,

Any thoughts on where to look? VPN w/ login option enable behaves the
same as making the VPN connection w/o the login option then trying to
login manually - takes 30-60 seconds-ish to timeout. So far, no
tweaking of login script but it doesn't look like it even gets that far.
Was using my own login, with which I've made a login over the VPN from
other machines in the past.

Is that fact that I'm using client 3.8 in backward compatibility mode
for a 3.6 server the issue?