Source note · SIP TLS handshake failures on trunks
RFC 8996 (BCP 195) says TLS 1.0 and TLS 1.1 must not be used or negotiated, and it updates RFC 3261 so SIP's minimum becomes TLS 1.2.
Checked 2026-09-25
TLS 1.0 MUST NOT be used.
- Vendor
- IETF
- Product
- TLS
- Subsystem
- TLS version negotiation
- Deployment
- any
- Region
- not restricted
- Release range
- RFC 8996 (March 2021)
- Checked
- 2026-09-25
Sources
- RFC 8996: Deprecating TLS 1.0 and TLS 1.1 — IETF · tier 1 standards and regulators · Sections 1.1, 4 and 5
Cite this note
APA
WarmTransfer. (2026, September 25). SIP TLS handshake failures on trunks: source note sip-tls-handshake-failures-rfc8996-no-tls10-11. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-tls-handshake-failures-rfc8996-no-tls10-11
BibTeX
@misc{warmtransfer-claim-sip-tls-handshake-failures-rfc8996-no-tls10-11,
title = {SIP TLS handshake failures on trunks: source note sip-tls-handshake-failures-rfc8996-no-tls10-11},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-tls-handshake-failures-rfc8996-no-tls10-11},
note = {Source note sip-tls-handshake-failures-rfc8996-no-tls10-11, checked 2026-09-25}
}