Bridge / route eth0 to wlan0

[aimc]

Hi, hello.
I've been trying everything for many hours. What i want to acchieve is simple to describe, let me show it in an image:



Description:
I have a computer (running Windows 7, but it should be the same for any OS) . The target PC doesn't have USB so i cannot plug a dongle.
I have a raspberry pi 2B, with a fully working dongle, up and running latest raspbian and connected to the LAN through wlan0.

What is needed is simply to connect the target computer to the LAN through RPI's wifi dongle. The IP of the target PC will be set by the DHCP of the LAN. Same goes to the internet connection. The target PC should have access to the LAN's resources (printers, files, etc)

I thought that bridging wlan0 and eth0 should do the trick, but the br0 (bridge interface created) doesn't seem to connect to the LAN wifi , i don't know why. I also tried ibtables without success (among many other ideas that are floating through the web).


Any help would be greatly appreciated.

[aimc]

anyone?

[Konek]

try https://rbnrpi.wordpress.com/project-li ... -ready-tv/

It work for me awhile back. although not sure about print services.

[realies]

When I was initially trying to do a similar job with linking the traffic between eth0 and wlan0 I also tried to bridge them... and it didn't work.
First of all, you need to setup the eth0 adapter in /etc/network/interfaces not to be using DHCP, a static configuration should look like

Code: Select all

iface eth0 inet static
  address 192.168.1.1
  netmask 255.255.255.0
  gateway 192.168.1.2

On your PC, you should configure the ethernet adapter to be using 192.168.1.2 as IP, 255.255.255.0 as netmask and 192.168.1.1 as gateway for the connection.

The next steps are to enable the traffic forwarding on the fly and make it permanent with

Code: Select all

sudo sysctl -w net.ipv4.ip_forward=1
sudo sed -i "s/#net.ipv4.ip_forward=1/net.ipv4.ip_forward=1/g" /etc/sysctl.conf

Add the networking rules to iptables

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sudo iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
sudo iptables -t nat -A POSTROUTING -o wlan0 -j MASQUERADE

Export them to a file

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sudo bash -c "iptables-save > /etc/iptables.rules"

And set your wlan0 interface to load them automatically every time it starts up (again, /etc/network/interfaces)

Code: Select all

iface wlan0 inet dhcp
  wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf
  pre-up iptables-restore < /etc/iptables.rules

I assume that this would probably do it.

[baantonia]

I managed to connect 4 ICQ Trend boiler controllers to our wifi each using a B+ via bridging. The Boiler controllers have to have a static IP address for this to work, normally if via wire DHCP will do fine. The settings I used can be found viewtopic.php?p=733494#p733494.

Note I did change the ath0 settings to br0 later on, still worked though.

One drawback, you cannot access the RPi via the network, it acts as if it is completely transparent to all traffic.