USG FLEX H Series - Which service ports should I open for VoWiFi?

Zyxel_Melen
Zyxel_Melen Posts: 2,305  Zyxel Employee
Zyxel Certified Network Engineer Level 1 - Switch Zyxel Certified Network Administrator - Switch Zyxel Certified Network Administrator - Nebula Zyxel Certified Sales Associate

Please allow UDP 500, and UDP 4500 for Wi-Fi calling/VoWiFi. If you are using iPhone, please also allow UDP 16384 - 49327 for RTP.