AT&T Gigabit Fiber Modem Bypass Using UniFi USG — Updated

  • Cloud Key Controller: 5.9.29
  • Cloud Key Firmware: UCK.mtk7623.v0.12.0.29a26c9.181001.1444
  • USG Firmware:



  • For IPV6 select “Use DHCPv6” and set Prefix Delegation Size to 60
  • Check “Use VLAN ID” and enter 0 in the box to the right (If you’re using the cloud controller save this step until after the ICMPv6 firewall change below. You will lose access to the cloud interface until you’re complete.)
  • IPv6 Interface Type: Prefix Delegation
  • IPv6 Prefix Delegation Interface: WAN
  • DHCPv6/RDNSS Name Server: IPv6 name server of your choice (2001:4860:4860::8888 for google)
  • Name: LAN2
  • Purpose: Corporate
  • Parent Interface: LAN2
  • Gateway/Subnet: (or whatever you prefer)
  • DHCP Mode: None
  • Name: ICMPv6
  • Action: Accept
  • IPv6 Protocol: ICMPv6







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