said by snuxoll:
The SMCDG3-CCR does not support bridging, if you wish to have a public IP assigned to a device behind the router you will need to purchase a static IP that can then be assigned to the device of your choosing.
The Comcast SMCD3G-CCR does indeed support a true bridge mode (I have personally used one in bridge mode with five devices behind it having public IP addresses). It is a Comcast marketing policy that does not support using the SMCD3G-CCR in true bridge mode; it is not a technical limitation. OTOH, it is a constant hassle with Comcast employees who insist on following marketing policy and doing factory resets on SMCD3G boxes that they find in bridge mode
, so I certainly won't encourage anyone to actually do it for anything other than a brief test while waiting for a purchased SB612x modem to arrive via FedEx or UPS.
In the network diagram shown below, the WAN interfaces of the Netgear N150, the Linksys RTP300, the Linux server, the Windows server, and the TP-Link WR1043ND (which was also in bridge mode) each had their own public IP addresses behind an SMCD3G-CCR in bridge mode.
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