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Decreasing Certificate Lifetimes to 45 Days (letsencrypt.org)

submitted 1 day ago by artiman@piefed.social to c/selfhosted@lemmy.world

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Let’s Encrypt will be reducing the validity period of the certificates we issue. We currently issue certificates valid for 90 days, which will be cut in half to 45 days by 2028.
This change is being made along with the rest of the industry, as required by the CA/Browser Forum Baseline Requirements, which set the technical requirements that we must follow. All publicly-trusted Certificate Authorities like Let’s Encrypt will be making similar changes. Reducing how long certificates are valid for helps improve the security of the internet, by limiting the scope of compromise, and making certificate revocation technologies more efficient.

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[–] thatsnothowyoudoit@lemmy.ca 3 points 8 hours ago

The current automation guidelines and defaults renew certs 30 days from expiry. So even today certs aren’t around for more than 60 days, it’s just that they’re valid for 90.

Additionally you can fairly easily monitor certs to get an alert if you drop below the 30 day threshold and automatic cert renewal hasn’t taken place.

I use Grafana self hosted for this with their synthetic monitoring free tier but it would be relatively trivial to roll your own Prometheus-exporter to do the same.