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As of December 2015, the Letsencrypt service is in a public beta state. They issue valid, trusted certificates, but the client code (and, to a lesser extent, the server code) is likely in a state of flux. At least during the initial stages of the public beta, they're implementing rate-limiting, allowing no more than five certificates per domain in a rolling seven-day period. This may make them unsuitable for users of dynamic DNS services. The latest information about rate limiting should be posted on [https://letsencrypt.org/docs/rate-limits/ this page] of the letsencrypt.org documentation. As of March 26, 2016, the rate limit has been increased to 20 certificates per domain per week.
As of December 2015, the Letsencrypt service is in a public beta state. They issue valid, trusted certificates, but the client code (and, to a lesser extent, the server code) is likely in a state of flux. At least during the initial stages of the public beta, they're implementing rate-limiting, allowing no more than five certificates per domain in a rolling seven-day period. This may make them unsuitable for users of dynamic DNS services. The latest information about rate limiting should be posted on [https://letsencrypt.org/docs/rate-limits/ this page] of the letsencrypt.org documentation. As of March 26, 2016, the rate limit has been increased to 20 certificates per domain per week.
If you're going to be testing things in ways that would involve requesting lots of certificates in a short period of time, you're encouraged to use the Letsencrypt staging CA for this purpose. Certificates generated by this CA will not be trusted by your browser, and will appear to be issued by the "Happy hacker CA", but it will allow you to validate the toolchain and workflow.
If you're going to be testing things in ways that would involve requesting lots of certificates in a short period of time, you're encouraged to use the Letsencrypt staging CA for this purpose. Certificates generated by this CA will not be trusted by your browser, and will appear to be issued by the "Fake LE Intermediate X1", but it will allow you to validate the toolchain and workflow.
The current status of the Letsencrypt services can be found on their [https://letsencrypt.status.io/ status page].
The current status of the Letsencrypt services can be found on their [https://letsencrypt.status.io/ status page].
