Source note · TLS versions and cipher support across UC platforms
RFC 9325 (BCP 195) says implementations MUST support TLS 1.2 and SHOULD support TLS 1.3, and if TLS 1.3 is implemented MUST prefer to negotiate it over earlier versions.
Checked 2026-10-02
- Vendor
- not restricted
- Product
- not restricted
- Subsystem
- TLS protocol versions
- Deployment
- standard
- Region
- not restricted
- Release range
- RFC 9325, November 2022
- Checked
- 2026-10-02
Sources
- RFC 9325: Recommendations for Secure Use of TLS and DTLS — IETF / RFC Editor · tier 1 standards and regulators · Section 3.1.1
Cite this note
APA
WarmTransfer. (2026, October 2). TLS versions and cipher support across UC platforms: source note tls-version-support-uc-rfc9325-tls12-must-tls13-should. WarmTransfer. https://warmtransfer.net/knowledge/claims/tls-version-support-uc-rfc9325-tls12-must-tls13-should
BibTeX
@misc{warmtransfer-claim-tls-version-support-uc-rfc9325-tls12-must-tls13-should,
title = {TLS versions and cipher support across UC platforms: source note tls-version-support-uc-rfc9325-tls12-must-tls13-should},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/tls-version-support-uc-rfc9325-tls12-must-tls13-should},
note = {Source note tls-version-support-uc-rfc9325-tls12-must-tls13-should, checked 2026-10-02}
}