[GH-ISSUE #2406] Invalid SSL certificate #1593

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opened 2026-02-27 11:17:58 +03:00 by kerem · 2 comments

kerem commented 2026-02-27 11:17:58 +03:00

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Originally created by @JuzioMiecio520 on GitHub (Nov 11, 2021).
Original GitHub issue: https://github.com/modoboa/modoboa/issues/2406

Impacted versions

• OS Type: Debian
• OS Version: 10 (buster)
• Database Type: installers default
• Database version: installers default
• Modoboa: latest
• installer used: Yes
• Webserver: Nginx

Steps to reproduce

1. Get a fresh GCP server
2. Install Modoboa as described in documentation using the installer
3. Navigate to mail.your.domain
4. Browser throws NET::ERR_CERT_AUTHORITY_INVALID

Current behaviour

Connection to web server crashes

Expected behavior

Connection attempt should be successful

Video/Screenshot link (optional)

Chrome 95.0.4638.69
Firefox 95.0b5
Microsoft Edge 95.0.1020.44

Originally created by @JuzioMiecio520 on GitHub (Nov 11, 2021). Original GitHub issue: https://github.com/modoboa/modoboa/issues/2406 # Impacted versions * OS Type: Debian * OS Version: 10 (buster) * Database Type: installers default * Database version: installers default * Modoboa: latest * installer used: Yes * Webserver: Nginx # Steps to reproduce 1. Get a fresh GCP server 2. Install Modoboa as described in documentation using the installer 3. Navigate to mail.your.domain 4. Browser throws NET::ERR_CERT_AUTHORITY_INVALID # Current behaviour Connection to web server crashes # Expected behavior Connection attempt should be successful # Video/Screenshot link (optional) Chrome 95.0.4638.69  Firefox 95.0b5  Microsoft Edge 95.0.1020.44 

kerem closed this issue 2026-02-27 11:17:58 +03:00

kerem commented 2026-02-27 11:17:59 +03:00

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@JuzioMiecio520 commented on GitHub (Nov 11, 2021):

I am using Cloudflare, but the certificate is turned off

<!-- gh-comment-id:966493495 --> @JuzioMiecio520 commented on GitHub (Nov 11, 2021): I am using Cloudflare, but the certificate is turned off

kerem commented 2026-02-27 11:17:59 +03:00

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@JuzioMiecio520 commented on GitHub (Nov 12, 2021):

The issue was resolved by setting "Encryption mode" in Cloudflare Dashboard to "Full" and creating, and then adding a certificate obtained from CF Dashboard > SSL/TLS > Client Certificates

<!-- gh-comment-id:966966990 --> @JuzioMiecio520 commented on GitHub (Nov 12, 2021): The issue was resolved by setting "Encryption mode" in Cloudflare Dashboard to "Full" and creating, and then adding a certificate obtained from **CF Dashboard > SSL/TLS > Client Certificates**

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starred/modoboa-modoboa#1593

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