Duo plugin 1.3 - Duo Health Check and the recent Duo outage on 21 AUG 2023

[Mak, Steve]

Hi Shib users and sorry if this is not the correct channel for this query.

On 21 AUG 2023 Duo had a major outage. In the Duo plugin documentation there exists a section for Duo Health Check and it implies that if Duo is down then the Duo redirect is skipped. However, I did not see that happening during the Duo outage and I'm wondering if either: 1) I misconfigured something 2) my expectations are incorrect or 3) the outage didn't apply to this feature.

Link to the outage postmortem: https://status.duo.com/incidents/rw7g0q7ztj8f

I have left the duo property for 'idp.duo.oidc.healthcheck.enabled' commented out by default, so I it is enabled in my systems.

Any insight would be greatly appreciated.

- Steve Mak
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