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No, the client would need to renew the cookie every 2.5 mins (similar approach to DHCP leases). If the external IP has changed, the cookie should not be renewed. If it's expired already, it should not be renewed.

This wont work, though, as nobody wants to sign in once per day. That's too inconvenient.

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If you are using SSO (to enforce U2F) and password managers (really, basic levels of enterprise auth competence in 2021) then signing in multiple times per day isn't a huge hassle because it's just a click and a tap.

For customers, yes, but I've worked at places where we required employees to re-auth daily (if not more frequently).

I worked at a place where re-auth was required every twelve hours, which was a convenient reminder of when you'd been working way too long.

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