'True Bridge Mode’ vs. 'Pass-Through Mode'

​With bridged devices the “Public” IP is announced directly to the customer owned managed Firewall or Router versus a Private IP (10.1.10.X or 192.168.1.X, etc.).​

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​If you want to use ‘true bridge mode’, please note the following characteristics of devices in bridge mode:​

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• ​Does not have router capabilities or support LAN DHCP​
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• ​Cannot have a fixed Static IP assignment​
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​Comcast Business customers can select devices from the following equipment list that are capable of running in bridge mode: ​​equipment options​​. ​

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​Comcast Business customers can set their existing Comcast Business Wireless Gateways to true bridge mode by:​

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1. ​Log into the modem​
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2. ​Disable Private WiFi (2.4GHz and 5GHz) to stop the gateway from broadcasting WiFi Network SSIDs after it is put into True Bridge mode ​​Disabling WiFi on Comcast Business Wireless Gateway​
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3. ​Navigate to the ​​Gateway – At a Glance​​ screen in the GUI ​​Gateway - At a Glance screen in Comcast Business Wireless Gateway​
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4. ​Click ​​Enable​​ to the right of Bridge Mode ​​Enable Bridge Mode on Comcast Business Wireless Gateway​
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5. ​Click ​​OK                          ​​Confirm Bridge Mode screen on Comcast Business Wireless Gateway​
   
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​**Note**:​​  the Cisco 3939B BWG cannot support WiFi in bridge mode.​

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​Pass-through Mode describes a modem which has its LAN DHCP and Firewall manually disabled through the user interface. This allows traffic to pass-through the modem to a routing device and can be used if the customer has a Static IP address. This is not true Bridge Mode and does not convert the gateway to a basic cable modem. This mode allows most of the routing capabilities of the gateway to remain intact.​

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​Comcast Business customers can put their Comcast Business Wireless Gateway into pass-through mode by:​

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1. ​Navigate to ​​Gateway > Firewall > IPv4 ​​for Firewall settings ​​Firewall/Smart Packet Detection on Comcast Business Wireless Gateway​
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​As a best practice for customer with their own firewall, ensure ​​Custom Security​​ is selected and ​​Disable Entire Firewall​​ is checked.​

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​Comcast Business customer with a SMC 8014, SMC D3G, or Netgear CG3000 Comcast Business modem can put their modem into pass-through mode by:​

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1. ​Navigate to ​​Firewall - Firewall Options​​ for Firewall settings ​
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