Across the sources, registration plus digest is the model that tolerates dynamic NAT and no public IP, while IP-allow-list and certificate (mTLS) trunks assume a stable public address or static NAT.
inferred · Checked 2026-10-02
- Vendor
- not restricted
- Product
- not restricted
- Subsystem
- model comparison
- Deployment
- any
- Region
- not restricted
- Release range
- current as of 2026-10-02
- Status
- inferred
- Checked
- 2026-10-02
Sources
- Get started with Local Gateway — Cisco Systems, Inc. (Webex Help Center) · tier 2 current vendor documentation · Trunk types comparison: network requirements rows
Cite this note
APA
WarmTransfer. (2026, October 2). SIP trunk authentication: registration and static IP and mutual TLS: source note sip-trunk-authentication-models-inf-registration-suits-nat. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-trunk-authentication-models-inf-registration-suits-nat
BibTeX
@misc{warmtransfer-claim-sip-trunk-authentication-models-inf-registration-suits-nat,
title = {SIP trunk authentication: registration and static IP and mutual TLS: source note sip-trunk-authentication-models-inf-registration-suits-nat},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-trunk-authentication-models-inf-registration-suits-nat},
note = {Source note sip-trunk-authentication-models-inf-registration-suits-nat, checked 2026-10-02}
}