Using a Raspberry Pi 2 with Pi-hole already set up—is there a way to set the Raspberry Pi up as a wifi-to-ethernet bridge?

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I've read Setting Up up a Bridged Wireless Access Point and several other posts on the topic on reddit and here, but most people trying to accomplish this are doing it on a fresh new setup with a more modern device, so the methods are failing for me as I am working with an older device and a lot of network settings are already in place on both my router and device.

I basically just want to have the currently unoccupied ethernet port of my RPi2 work as a means by which to pass Wi-Fi connectivity from the Pi to a device over a cable.

Current setup:

  • RPi:
    • Raspberry Pi 2 Model B Rev 1.1
      • Raspian 10 (Buster)
      • Linux kernel 5.10.103-v7+
  • Pi-hole:
  • Other info:
    • RPi2 has a Wi-Fi dongle for connectivity; Ethernet port is currently unused
    • Network router is running DD-WRT and looking to Pi-hole as DNS server
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That is not about Pi-hole or Customizing Pi-hole, it is about your OS's network configuration.

While I've recategorised your topic to Community Help, you may also want to consider consulting additional forums or support channels for your OS that specialise in networking.

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My two cents. By adding bridging capabilities, traffic will be significantly increased 'through' your pi. With just pi-hole, the much lighter, DNS-only traffic is all it has to manage/serve. Performance, for pi-hole and even your bridged traffic, could suffer if usage is high enough.

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4

Presuming you already have WIFI from the dongle and want better range from your main router (which must have WIFI given your setup):
Any extender (something that listens to your WIFI, does not need a cable, and is positioned optimally Amazon.com: TP-Link N300 WiFi Extender(RE105), WiFi Extenders Signal Booster for Home, Single Band WiFi Range Extender, Internet Booster, Supports Access Point, Wall Plug Design, 2.4Ghz only : Electronics) or cheap/old WIFI router can connect to your main WIFI router and do what you are asking for.
If your router has all LAN ports used, get a switch (Amazon.com: TP-Link TL-SG105, 5 Port Gigabit Unmanaged Ethernet Switch, Network Hub, Ethernet Splitter, Plug & Play, Fanless Metal Design, Shielded Ports, Traffic Optimization : Electronics) and cable it to the new and existing router or the specific device you want wired.

But know, your link is about two different things: bridging and Access Points. These are easy to confuse and seldom detangled.

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