Source note · Troubleshooting Zoom Phone
Zoom's firewall rules for Zoom Phone list UDP 3478 from all Zoom clients for TURN (Traversal Using Relays around NAT) support.
Checked 2026-09-25
- Vendor
- Zoom
- Product
- Zoom Phone
- Subsystem
- network-firewall
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-09-25
- Checked
- 2026-09-25
Sources
- Zoom network firewall or proxy server settings — Zoom Communications · tier 2 current vendor documentation · section 'Firewall rules for Zoom Phone', UDP 3478 row
Cite this note
APA
WarmTransfer. (2026, September 25). Troubleshooting Zoom Phone: source note zoom-phone-troubleshooting-fw-udp-3478. WarmTransfer. https://warmtransfer.net/knowledge/claims/zoom-phone-troubleshooting-fw-udp-3478
BibTeX
@misc{warmtransfer-claim-zoom-phone-troubleshooting-fw-udp-3478,
title = {Troubleshooting Zoom Phone: source note zoom-phone-troubleshooting-fw-udp-3478},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/zoom-phone-troubleshooting-fw-udp-3478},
note = {Source note zoom-phone-troubleshooting-fw-udp-3478, checked 2026-09-25}
}