Source note · Troubleshooting SIP 403 Forbidden from a carrier
RFC 8224 proposes no authorization policy based on a valid, invalid, absent or stale Identity header; how a message is handled after verification depends on the implementation and local policy.
Checked 2026-09-30
This specification does not propose any authorization policy for UAs or proxy servers to follow based on the presence of a valid Identity header field, the presence of an invalid Identity header field, the absence of an Identity header field, or the presence of a stale Date header field value.
- Vendor
- IETF
- Product
- STIR
- Subsystem
- verification service
- Deployment
- any
- Region
- not restricted
- Release range
- current as of 2026-09-30
- Checked
- 2026-09-30
Sources
- RFC 8224: Authenticated Identity Management in the Session Initiation Protocol (SIP) — IETF / RFC Editor · tier 1 standards and regulators · section 6.2.1
Cite this note
APA
WarmTransfer. (2026, September 30). Troubleshooting SIP 403 Forbidden from a carrier: source note sip-403-forbidden-troubleshooting-rfc8224-local-policy. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-403-forbidden-troubleshooting-rfc8224-local-policy
BibTeX
@misc{warmtransfer-claim-sip-403-forbidden-troubleshooting-rfc8224-local-policy,
title = {Troubleshooting SIP 403 Forbidden from a carrier: source note sip-403-forbidden-troubleshooting-rfc8224-local-policy},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-403-forbidden-troubleshooting-rfc8224-local-policy},
note = {Source note sip-403-forbidden-troubleshooting-rfc8224-local-policy, checked 2026-09-30}
}