Source note · SIP TLS handshake failures on trunks
The TLS handshake_failure alert (40) means the sender could not negotiate an acceptable set of security parameters from the options offered.
Checked 2026-09-25
- Vendor
- IETF
- Product
- TLS
- Subsystem
- TLS alerts
- Deployment
- any
- Region
- not restricted
- Release range
- TLS 1.3 (RFC 8446); same code in TLS 1.2
- 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, handshake_failure
Cite this note
APA
WarmTransfer. (2026, September 25). SIP TLS handshake failures on trunks: source note sip-tls-handshake-failures-rfc8446-handshake-failure. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-tls-handshake-failures-rfc8446-handshake-failure
BibTeX
@misc{warmtransfer-claim-sip-tls-handshake-failures-rfc8446-handshake-failure,
title = {SIP TLS handshake failures on trunks: source note sip-tls-handshake-failures-rfc8446-handshake-failure},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-tls-handshake-failures-rfc8446-handshake-failure},
note = {Source note sip-tls-handshake-failures-rfc8446-handshake-failure, checked 2026-09-25}
}