Source note · SIP scanning and telephony denial of service
In SIP digest authentication a user agent server challenges with 401 and a WWW-Authenticate header, while a proxy challenges with 407 and a Proxy-Authenticate header.
Checked 2026-09-25
- Vendor
- IETF
- Product
- SIP
- Subsystem
- Digest authentication
- Deployment
- any
- Region
- not restricted
- Release range
- RFC 3261
- Checked
- 2026-09-25
Sources
- RFC 3261 — SIP: Session Initiation Protocol — IETF / RFC Editor · tier 1 standards and regulators · Sections 22.1 and 22.3
Cite this note
APA
WarmTransfer. (2026, September 25). SIP scanning and telephony denial of service: source note sip-scanning-tdos-rfc3261-digest-challenges. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-scanning-tdos-rfc3261-digest-challenges
BibTeX
@misc{warmtransfer-claim-sip-scanning-tdos-rfc3261-digest-challenges,
title = {SIP scanning and telephony denial of service: source note sip-scanning-tdos-rfc3261-digest-challenges},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-scanning-tdos-rfc3261-digest-challenges},
note = {Source note sip-scanning-tdos-rfc3261-digest-challenges, checked 2026-09-25}
}