cf.tls_client_auth.cert_issuer_ski
cf.tls_client_auth.cert_issuer_ski
String The Subject Key Identifier (SKI) of the direct issuer of the certificate in the request.
This field is only filled in if the request includes a client certificate for mTLS authentication.
Example value:
"8204924CF49D471E855862706D889F58F6B784D3"
Categories:
- Request
- mTLS
Was this helpful?
- Resources
- API
- New to Cloudflare?
- Products
- Sponsorships
- Open Source
- Support
- Help Center
- System Status
- Compliance
- GDPR
- Company
- cloudflare.com
- Our team
- Careers
- 2025 Cloudflare, Inc.
- Privacy Policy
- Terms of Use
- Report Security Issues
- Trademark