> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://help.flexbox.cloud/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# Why does a browser identify an SSL/TLS certificate as untrusted?

In this case, there is a problem with the certificate or its installation. 

The certificate may be self-signed (unreliable), expired, or issued to a different address than the one the browser is trying to access. 

There may also be a problem with the installation of the root and intermediate certificates.


To buy or renew an SSL/TLS certificate, check out our offers: [https://flexbox.cloud/en/certificates/tls-ssl/](https://flexbox.cloud/en/certificates/tls-ssl/)