Source note · SIP registration failures
A registrar that offers only SHA-256 digest challenges to a UA that supports only MD5 will probably cause authentication to fail, which shows up as repeated challenges or an abandoned registration.
inferred · Checked 2026-09-25
- Vendor
- not restricted
- Product
- SIP
- Subsystem
- authentication
- Deployment
- any
- Region
- not restricted
- Release range
- current as of 2026-09-25
- Status
- inferred
- Checked
- 2026-09-25
Sources
- RFC 8760: The Session Initiation Protocol (SIP) Digest Access Authentication Scheme — RFC Editor / IETF · tier 1 standards and regulators · multiple-challenge and UAC selection sentences
Cite this note
APA
WarmTransfer. (2026, September 25). SIP registration failures: source note sip-registration-failures-algorithm-mismatch. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-registration-failures-algorithm-mismatch
BibTeX
@misc{warmtransfer-claim-sip-registration-failures-algorithm-mismatch,
title = {SIP registration failures: source note sip-registration-failures-algorithm-mismatch},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-registration-failures-algorithm-mismatch},
note = {Source note sip-registration-failures-algorithm-mismatch, checked 2026-09-25}
}