Windows client - SSL certificate failure

[Richard Haselgrove]

We are getting multiple reports that Windows BOINC clients - specifically, the recommended v7.16.11 client - are having peer certificate validations errors when contacting projects.

Major projects known to be affected are CPDN and GPUGrid.

A user on the BOINC message board has attributed this to an update by Let's Encrypt: https://boinc.berkeley.edu/forum_thread.php?id=14413&postid=105526#105526

A similar event on the last day of May 2020 led to the emergency release of BOINC v7.16.7 the same day.

Could we have an announcement whether a similar thing can be done this time, please?

[Matthew Blumberg]

In case useful, here's a draft guide to help projects affected by the Let's Encrypt issue:

Let's Encrypt Certificate Issues

-- It's a first draft, by Tristan Olive; permissions allow anyone to add content where it may be useful.

-- Please do share with anyone who might find it useful.

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