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John's Blog: Let's Encrypt in Rumpus 9 for Windows

October 27, 2022

Rumpus 9.0 includes a built-in function for creating and managing SSL certificates via Let's Encrypt. The Let's Encrypt service is regularly updated, and Maxum is updating Rumpus accordingly. Recent LE updates have caused changes in Rumpus that requires the use of .NET 4.7.2 or later, so a compatible version of Rumpus is available here.

Download Rumpus with Let's Encrypt Manager

Because the release package of Rumpus 9.0 supports older .NET frameworks, the Let's Encrypt Manager can't be included. This installer package is identical to the release package, with the exception of Let's Encrypt support and the .Net 4.7.2 system requirement.

As always, if you have questions about this package, Let's Encrypt support in Rumpus, or have any other Rumpus related issue, please contact

Why does Rumpus not auto-renew certificates?

There is a lot more than meets the eye in generating an SSL certificate, even through Let's Encrypt. It's a complicated process that includes coordination with the Let's Encrypt registration service, the verification server, and local processing on your Rumpus server.

The Rumpus Let's Encrypt manager reduces this work to 2 buttons, one to issue the cert and one to install it, which makes the administration task quick and painless for the administrator. By having the administrator present and actively perform these tasks, we ensure that if some problem does occur during certificate issuance, the administrator is there to handle the problem. If there server were to auto-renew without the admin actively performing the action, a failure could bring down the site without warning.

In the upcoming Rumpus 10 release, we plan to expand on the Let's Encrypt function in Rumpus, which will allow for automatically renewing certificates. But for now, it's best to manually register so that the administrator is present during this complicated process in case of unexpected problems.