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--- internet:security:ssl_cert_letsencrypt_zimbra [2022/08/04 12:32]
gcooper
+++ — (current)
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-====== Using LetsEncrypt SSL Certificates with Zimbra ======
-See also **[[internet:mail:zimbra:zimbra_ssl#self-signed_certificates|Zimbra Self-Signed SSL Certs]]**
-**Howto**: https://wiki.zimbra.com/wiki/Installing_a_LetsEncrypt_SSL_Certificate
-<note warning>
-Your Zimbra will be restarted during this process, taking users offline!
-</note>
-<note tip>Be sure to include all Subject Alternative Hostnames (SANs) that you need on the certificate.</note>
-FIXME This next tip needs careful testing and verification!
-<note tip>The single-server portion of the howto is fantastic.  However, it only works for the actual hostname and doesn't include any SANs (alternate hostnames) you might need.  If you already have an Nginx Proxy Manager, you might use it to create a ''Redirection Host'' for your main Zimbra hostname, including the LetsEncrypt certificate.</note>
-===== Troubleshooting =====
-If you have trouble reissuing a new cert, or **if Zimbra won't start**, recreate and deploy a new self-signed cert to get Zimbra 'working' again.  Then re-implement a LetsEncrypt cert.
-If a cert is expired, you must reissue a new cert.
-If a certificate renewal fails, try reissuing a new cert instead.

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