How to Install SSL Certificate on Zimbra Server

Quick Steps to install SSL on Zimbra Server

Initial Checklist

Before Installing SSL Certificate please complete the following important processes.

• Buy/renew SSL Certificate
• Generate CSR with SHA-2 algorithm
• Save the CSR & Private key file on your server
• Apply for SSL Certificate Issuance
• Submit SSL Certificate issuance documents as per CA’s requirement (Only for Extended & Organization Validation)

Step 1: Extract SSL Certificate Files

Step 2: SSL Certificate Installation on Zimbra

• Open your server certificate file using any text editor, copy its data and paste it in the new text file.
• Rename this text file as crt and save it on /opt/zimbra/ssl/zimbra/commercial/ Zimbra server directory.

Intermediate & Root Certificate installation

• Open your intermediate file and root certificate file using text editor.
• Create a new file
• First copy the encrypted data of Intermediate certificate and paste it into the new file
• Copy the encrypted data of Root certificate file & paste it into new file under the encrypted data of intermediate certificate. Give this new file name as crt & store it in to /opt/zimbra/ssl/zimbra/commercial/ directory.
• The crt file will be look something like this

 -----BEGIN CERTIFICATE----- 
Encrypted Data of Intermediate Certificate
-----END CERTIFICATE-----  

-----BEGIN CERTIFICATE----- 
Encrypted Data of Root Certificate
-----END CERTIFICATE-----

• Enter following single line of code to validate the SSL Certificate chain

/opt/zimbra/openssl/bin/openssl verify -CAfile commercial_ca.crt commercial.crt

• To enable the SSL certiificate run the following line of code.

/opt/zimbra/bin/zmcertmgr deploycrt comm commercial.crt commercial_ca.crt

Your SSL Certificate is now installed on Zimbra Server.

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