A participant in cpdn is getting the message: Peer Certificate cannot be authenticated with given CA certificates
There's nothing wrong at the project side, so if it's an outdated crt, how does one update it / get a new bundle?

Which BOINC version do they use? The most updated certificates are in 7.10 and above.

They can download a fresh version from the source code at https://github.com/BOINC/boinc/blob/master/curl/ca-bundle.crt, save directly over the previous version, yes to overwrite. Exit and restart BOINC afterwards.

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Which BOINC version do they use? The most updated certificates are in 7.10 and above.

They can download a fresh version from the source code at https://github.com/BOINC/boinc/blob/master/curl/ca-bundle.crt, save directly over the previous version, yes to overwrite. Exit and restart BOINC afterwards.

In theory, the user on CPDN boards should have the most up to date list as on 7.14.2 on the machine running the task in question. I still think it worth trying your remedy though.

Haven't heard back from the O.P. yet.
The cure isn't as bad as I thought it might be, involving reloading BOINC or something.

I'm on 7.14.2 so that wasn't the problem.

Well, The problem vanished this morning and the trickle uploaded.

The problem has been there for a few weeks but I hadn't noticed it as all zips were going up OK so hadn't bothered to look at the log file.

A strange one because I initially thought it was my internet connection but obviously not since zips were OK at the same time that I was getting the message.

I'll reply on the Messages board as well.
Thanks for the help.

When you see it happening again, try setting the http_debug flag from event log options. It may give more information.

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