Because our Smart-TV had only LAN built in I wanted to use the RPi 3 to bridge WiFi to LAN.
This tutorial worked for me before I updated to a later raspbian version:
https://www.raspberrypi.org/forums/viewtopic.php?f=36&t=132674
I adapted it a bit until it worked for me on raspbian stretch 2017-07-09

The configuration file of the DHCP Client (dhcpcd5) /etc/dhcpcd.conf is used instead of /etc/network/interfaces.

Preparation

Upgrade everything. Install rpi-update and dnsmasq. Run rpi-update => reboot.

Connect to WiFi

Edit wpa_supplicant.conf

Add your network credentials

Static DHCPCD Configuration

Edit dhcpcd.conf

Add this OR uncomment the example and modify

DHCP Server

Backup dnsmasq.conf and create new

Add configuration for DNS & DHCP-Server (dnsmasq)

Enable IPv4 forwarding

Edit sysctl.conf

Uncomment this line

IP Tables

 

3 thoughts on “RPi 3 – WiFi to Ethernet Bridge”

  1. Ran through this guide and everything seemed to work well, but I lose internet connection on the pi whenever I connect the ethernet device to the pi. Can’t tell if device is getting internet(it’s an IP camera), got any ideas?

    1. What do you mean by “the raspberry loses internet connection”?
      Does the IP Camera use DHCP and can you maybe reset it?
      Have you tried a different device on the ethernet port (a laptop,…)?

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