> For the complete documentation index, see [llms.txt](https://docs.tryterra.co/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.tryterra.co/faq/help-topics/something-else/custom-subdomains-ssl-and-security.md).

# Custom subdomains, SSL and security

Common questions about custom subdomains, SSL and security.

## Articles

{% content-ref url="/pages/mw5Us1L4zj6AoGNUDh4R" %}
[Why won't my custom subdomain CNAME or SSL validate?](/faq/help-topics/something-else/custom-subdomains-ssl-and-security/cname-validation-ssl-issuance-troubleshooting.md)
{% endcontent-ref %}

{% content-ref url="/pages/FSqDsGO7v9HH95a8FvsJ" %}
[What redirect and webhook URLs do I use for a custom WHOOP subdomain?](/faq/help-topics/something-else/custom-subdomains-ssl-and-security/custom-subdomain-redirect-webhook-setup.md)
{% endcontent-ref %}

{% content-ref url="/pages/8cJX8ix0UCOENDXMEyxT" %}
[Does Terra use my Google OAuth client ID?](/faq/help-topics/something-else/custom-subdomains-ssl-and-security/google-oauth-client-ownership.md)
{% endcontent-ref %}