Alexa for Business
Administration Guide

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Firewall and Network Requirements

To join meetings and make calls from your Echo devices, you must have the following ports and protocols:

Service Protocol Destination Port Transport
Signaling HTTPS 443 TCP
Media port/connectivity negotiation ICE/STUN/TURN 3478 TCP/UDP


UDP is preferred. Only open TCP 3478 if UDP 3478 isn't allowed.

Conference or PSTN calling audio


G.711 audio codec

SRTP 49152 - 65535 UDP