A registration-based Webex Calling Local Gateway works behind any NAT or a public IP, with dynamic NAT preferred, because the firewall pinholes are opened by the gateway's outbound registration.
Checked 2026-10-02
Any NAT or Public IP. Dynamic NAT is preferred since it's easier for setup and requires fewer firewall configurations.
- Vendor
- Cisco
- Product
- Webex Calling
- Subsystem
- Local Gateway trunk
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-10-02
- 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 row
Cite this note
APA
WarmTransfer. (2026, October 2). SIP trunk authentication: registration and static IP and mutual TLS: source note sip-trunk-authentication-models-webex-lgw-reg-any-nat. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-trunk-authentication-models-webex-lgw-reg-any-nat
BibTeX
@misc{warmtransfer-claim-sip-trunk-authentication-models-webex-lgw-reg-any-nat,
title = {SIP trunk authentication: registration and static IP and mutual TLS: source note sip-trunk-authentication-models-webex-lgw-reg-any-nat},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-trunk-authentication-models-webex-lgw-reg-any-nat},
note = {Source note sip-trunk-authentication-models-webex-lgw-reg-any-nat, checked 2026-10-02}
}