https://github.com/ryansch/wifi-bridge
https://github.com/ryansch/wifi-bridge
Last synced: 3 months ago
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- Host: GitHub
- URL: https://github.com/ryansch/wifi-bridge
- Owner: ryansch
- Created: 2024-07-22T11:47:21.000Z (11 months ago)
- Default Branch: main
- Last Pushed: 2024-07-22T12:00:45.000Z (11 months ago)
- Last Synced: 2025-03-11T00:08:20.788Z (3 months ago)
- Size: 5.86 KB
- Stars: 0
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
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README
# WiFi Bridge
I'm using this on a raspberry pi 3 running Ubuntu server to bridge an Ethernet-only OpenSprinker to my WiFi network.
## Install
```sh
sudo apt install parprouted dhcp-helper avahi-daemon net-tools
```
/etc/netplan/60-wifi-bridge.yaml:
```yaml
network:
version: 2
ethernets:
renderer: networkd
eth0:
optional: true
dhcp4: false
```
/etc/sysctl.d/local.conf:
```
net.ipv4.ip_forward=1
```
/etc/networkd-dispatcher/routable.d/50-wifi-bridge:
```sh
#!/bin/sh
if [ "$IFACE" = "wlan0" ]; then
/sbin/ip link set wlan0 promisc on
/sbin/ip addr add $(/sbin/ip addr show wlan0 | perl -wne 'm|^\s+inet (.*)/| && print $1')/32 dev eth0
/usr/sbin/parprouted eth0 wlan0
fi
```
/etc/networkd-dispatcher/off.d/50-wifi-bridge:
```sh
#!/bin/sh
if [ "$IFACE" = "wlan0" ]; then
/usr/bin/killall /usr/sbin/parprouted
/sbin/ip link set eth0 down
fi
```
Edit /etc/default/dhcp-helper:
```sh
# relay dhcp requests as broadcast to wlan0
DHCPHELPER_OPTS="-b wlan0"
```
Edit /etc/avahi/avahi-daemon.conf:
```
[reflector]
enable-reflector=yes
```
Enable services:
```sh
sudo systemctl enable dhcp-helper --now
```
Reboot!
### References
- Main documentation: https://wiki.debian.org/BridgeNetworkConnectionsProxyArp
- Netplan yaml reference: https://netplan.readthedocs.io/en/stable/netplan-yaml/
- Netplan FAQ for post-up/post-down scripts: https://netplan.io/faq
- networkd-dispatcher docs: https://gitlab.com/craftyguy/networkd-dispatcher/-/tree/master
- WiFi promiscuous mode: https://github.com/PiSCSI/piscsi/issues/1387
Inspired by: https://gist.github.com/Jiab77/76000284f8200da5019a232854421564