Another query out of left field: extending the session timeout indefinitely for E911 VOIP service

[Cantor, Scott]

If you're talking about the IdP, it is not true that the IdP is responsible for anything expiring, because session lifetime at an SP is dependent on the SP, not the IdP. It lasts as long as the SP wants it to.

> I write to ask if Shibboleth/SAML2 handles periodic authentication of online
> devices in some way. 

The IdP's entire function is periodic authentication of online devices. That's literally what SAML does. So whatever you mean probably isn't what I would interpret that to mean.

-- Scott