help : ask about expert certificate carbonio

@erdhani

hi,

Sorry, I did not get your question?

Are you talking about free or paid(commercial) SSL certificate?

i mean

Certificate of Competency or Professional Certification

for installing carbonio

@erdhani 

Hi,

Installing SSL certificate in Carbonio CE does not specifically require Certificate of Competency or Professional Certification. Like many other system admins, you can install/deploy SSL certificate in Carbonio CE with the basic concept or experience or with formal certifications on following topics:

Topics & Concepts for Deploying SSL in Carbonio CE

1. Fully Qualified Domain Name (FQDN) Setup

   • Configuring hostname (/etc/hostname)

   • Editing /etc/hosts and /etc/resolv.conf

   • Ensuring DNS A and MX records are correct

2. Understanding SSL/TLS Certificates

   • Purpose of SSL for mail and web interfaces

   • Certificate types: Self-signed vs CA-signed

   • File types: .crt, .key, .csr, .pem, .pfx

3. Generating Certificate Signing Request (CSR)

   • Using openssl or built-in tools (e.g., zmcertmgr)

   • Understanding common fields (CN, SAN, etc.)

   • Saving and securing private keys

4. Obtaining SSL Certificates

   • From trusted Certificate Authorities (e.g., Let’s Encrypt, Sectigo)

   • Using Certbot or manual process or using Admin Panel GUI

   • Full certificate chain (certificate + intermediate + root)

5. Installing SSL Certificates

   • File placement:

     • Carbonio: /opt/zextras/ssl/

   • Using zmcertmgr

   • Updating symbolic links or configuration files if needed

6. Restarting Services After SSL Deployment

   • Carbonio: systemctl restart carbonio-* or related services

7. Let’s Encrypt Integration (Optional but Recommended)

   • Installing, configuring, modifying Certbot [Though Carbonio CE comes with a certbot package]

   • Automating certificate renewal

   • Writing renewal hooks to reload services 

8. SSL Certificate Testing and Validation

   • Using openssl s_client or online SSL checkers

   • Validating certificate chain, hostname, and expiration

   • Ensuring IMAP/SMTP/HTTPS all present valid certs

9. Common SSL Deployment Issues

   • Mismatched private key and certificate

   • Missing intermediate certificates

   • Wrong permissions on cert files