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    Firewall Rules for Zoom Phone Hardware/Appliances

    (Updated: March 3, 2023)

    The table below lists IP addresses and ports used for Zero Touch Provisioning on Zoom certified Grandstream devices. Network administrators can refer to this table when configuring firewall rules to accommodate Zero Touch Provisioning on Grandstream devices.

    Domain IP Address Port Protocol
    acs.gdms.cloud 35.161.51.90 80
    443    		 HTTP
    HTTPS
    stun1.gdms.cloud 34.215.167.138 3478
    3479
    		 UDP
    stun-guest-a.gdms.cloud 207.246.119.209 3478
    3479    		 UDP
    euacs.gdms.cloud 3.71.171.8 80
    443    		 HTTP
    HTTPS
    eu.stun1.gdms.cloud 52.28.7.85 3478
    3479    		 UDP
    syslog.gdms.cloud 34.215.167.138 6514
    		 TLS
    us.download.gdms.cloud 144.202.94.88 80
    443    		 HTTP
    HTTPS
    eu.syslog.gdms.cloud 52.28.7.85 6514
    		 TLS
    eu.download.gdms.cloud 217.69.12.50 80
    443    		 HTTP
    HTTPS