# Repository certificate verification failure

**URL:** <https://community.influxdata.com/t/repository-certificate-verification-failure/58643>\
**Category:** InfluxDB 2\
**Tags:** installation\
**Created:** [July 22, 2026, 2:01pm UTC](https://community.influxdata.com/t/repository-certificate-verification-failure/58643 "2026-07-22T14:01:44Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![olaf.koch](https://avatars.discourse-cdn.com/v4/letter/o/35a633/32.png) [@olaf.koch](https://community.influxdata.com/u/olaf.koch)\
**Post date:** [July 22, 2026, 2:01pm UTC](https://community.influxdata.com/t/repository-certificate-verification-failure/58643/1 "2026-07-22T14:01:45Z")

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Why has the certificate of the repository [https://repos.influxdata.com](https://repos.influxdata.com) an issuer name of cloudflaressl?

 ![image](https://us1.discourse-cdn.com/flex023/uploads/influxdata/original/3X/5/9/59a0846ba46e974603feea77ade7610079099098.png)

Fehl:5 [InfluxData - Package Repository](https://repos.influxdata.com/debian) stable InRelease  
Certificate verification failed: The certificate is NOT trusted. The certificate issuer is unknown. Could not handshake: Error in the certificate verification. [IP: 104.21.37.224 443]

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<div class="post-metadata">

**Author:** ![olaf.koch](https://avatars.discourse-cdn.com/v4/letter/o/35a633/32.png) [@olaf.koch](https://community.influxdata.com/u/olaf.koch)\
**Post date:** [July 30, 2026, 6:49am UTC](https://community.influxdata.com/t/repository-certificate-verification-failure/58643/2 "2026-07-30T06:49:00Z")

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The reason for “certificate issuer is unknown” was, that the ca-certificate for “GTS Root R4” was disabled in my Ubuntu.