Source note · SIP TLS handshake failures on trunks
TLS signals an unsupported protocol version with protocol_version (70) and parameters judged too weak with insufficient_security (71); in TLS 1.3 a server that requires a client certificate and gets none sends certificate_required (116).
Checked 2026-09-25
- Vendor
- IETF
- Product
- TLS
- Subsystem
- TLS alerts
- Deployment
- any
- Region
- not restricted
- Release range
- TLS 1.3 (RFC 8446)
- Checked
- 2026-09-25
Sources
- RFC 8446: The Transport Layer Security (TLS) Protocol Version 1.3 — IETF · tier 1 standards and regulators · Section 6.2
Cite this note
APA
WarmTransfer. (2026, September 25). SIP TLS handshake failures on trunks: source note sip-tls-handshake-failures-rfc8446-version-alerts. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-tls-handshake-failures-rfc8446-version-alerts
BibTeX
@misc{warmtransfer-claim-sip-tls-handshake-failures-rfc8446-version-alerts,
title = {SIP TLS handshake failures on trunks: source note sip-tls-handshake-failures-rfc8446-version-alerts},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-tls-handshake-failures-rfc8446-version-alerts},
note = {Source note sip-tls-handshake-failures-rfc8446-version-alerts, checked 2026-09-25}
}