This is one of the primary reasons why you may want to place the gateway in bridge mode to avoid double NAT issue.ĭepending on the model of the gateway, you may be able to enable bridge mode yourself. A double NAT occurs when you have two devices requiring to be in the same LAN, but belonging to two different subnetwork due to having two routers. Also, because you're disabling NAT on your gateway, you won't have a double NAT issue with the home router you may have connected to your gateway. However, you may still use the DHCP server functionality provided in most routers. The network before the bridged gateway and after the gateway is in the same network.Īs you're not filtering any traffic, you cannot use NAT feature in a bridge mode. Since you're making the gateway a layer 2 device, you cannot assign a static IP address to your gateway in bridge mode. By enabling the bridge mode, we're essentially disabling the router function (layer 3) and make the gateway function as a modem (layer 2). To accomplish this, an ISP may configure the gateway to a 'bridge' mode, and pass the traffic through the gateway without performing the routing functions. A router is a layer-3 device that examines destination IP address, and either passes on to the adjacent network or discard it if it isn't.Īn ISP provides you with a gateway which is a bundle of modem and router, and there are times when a customer may want to use their own router instead of the router built into the gateway.A modem is a layer-2 device that converts the analog signal to digital (such as the cable modem and DSL) and delivers traffic to you without any filtering.A gateway is a modem and router combo, which connects ISPs WAN (wide area network) to your home. A gateway is a device your ISP provides to you so that you can connect to the Internet. In our previous article, we discussed gateway vs router and the differences between the two. So, what is the bridge mode, and what is the pass-through mode?īefore we discuss bridge vs pass-through mode, we need to understand what gateway is.

Depending on how you want to configure your network, you may configure the gateway to bridge over passthrough. When you set up a gateway at home, you may opt to enable a bridge or pass-through mode.

What is a passthrough mac address