Steps to connect Ethernet only devices, e.g. POE security cams, to home WiFi.
- A raspberry pi board running PiOS and connected to home WiFi
- Ethernet cable
- Install
dnsmasq
sudo apt update
sudo apt upgrade
sudo apt-get install dnsmasq
- Setup
/etc/dhcpcd.conf
sudo vi /etc/dhcpcd.conf
Go to Example static IP configuration section and append the following lines:
interface eth0
metric 333
static ip_address=192.168.10.1/24
static routers=192.168.10.0
NB: Metric should be higher than the default home WiFi gateway's metric (say if it was 303 then we'd use 333).
- Restart
dhcpcd.serviceand verify it started OK.
sudo systemctl restart dhcpcd.service
sudo systemctl status dhcpcd.service
Output should look something like:
dhcpcd.service - dhcpcd on all interfaces
Loaded: loaded (/lib/systemd/system/dhcpcd.service; enabled; vendor preset: e
Active: active (running) since Tue 2023-03-14 13:23:29 AEDT; 1 day 4h ago
Process: 470 ExecStart=/usr/lib/dhcpcd5/dhcpcd -q -b (code=exited, status=0/SU
Main PID: 525 (dhcpcd)
Tasks: 2 (limit: 2059)
CGroup: /system.slice/dhcpcd.service
├─525 /sbin/dhcpcd -q -b
└─573 wpa_supplicant -B -c/etc/wpa_supplicant/wpa_supplicant.conf -iw
- Save original
/etc/dnsmasq.conf
sudo mv /etc/dnsmasq.conf /etc/dnsmasq.conf.orig
- Create a new
/etc/dnsmasq.conf
sudo vi /etc/dnsmasq.conf
Add the following lines:
interface=eth0 # Use interface eth0
listen-address=192.168.10.1 # Specify the address to listen on
bind-dynamic # Bind to the interface
server=8.8.8.8 # Use Google DNS
domain-needed # Don't forward short names
bogus-priv # Drop the non-routed address spaces.
dhcp-range=192.168.10.50,192.168.10.150,12h # IP range and lease time
- Enable IP forwarding (if not already done so):
sudo vi /etc/sysctl.conf
Then uncomment #net.ipv4.ip_forward=1
sudo sh -c "echo 1 > /proc/sys/net/ipv4/ip_forward"
- Setup
iptablesrules.
NB: Edit in correct camera IP addresses (ref/var/lib/misc/dnsmasq.leases). Then run the scripts to generateiptablesrules and to save these in/etc/iptables.ipv4.nat.
chmod 755 00-wifi2eth-*
./00-wifi2eth-bridged-rules
./00-wifi2eth-save-my-iptables
-
Add saved
iptablesrules for load-up on reboot by editingsudo vi /etc/rc.localand adding beforeexit 0the following lineiptables-restore < /etc/iptables.ipv4.nat -
Re-start
dnsmasq
sudo systemctl restart dnsmasq.service
sudo systemctl status dnsmasq.service
Output should look something like:
dnsmasq.service - dnsmasq - A lightweight DHCP and caching DNS server
Loaded: loaded (/lib/systemd/system/dnsmasq.service; enabled; vendor preset:
Active: active (running) since Tue 2023-03-14 13:23:32 AEDT; 1 day 5h ago
Process: 548 ExecStartPre=/usr/sbin/dnsmasq --test (code=exited, status=0/SUCC
Process: 559 ExecStart=/etc/init.d/dnsmasq systemd-exec (code=exited, status=0
Process: 588 ExecStartPost=/etc/init.d/dnsmasq systemd-start-resolvconf (code=
Main PID: 587 (dnsmasq)
Tasks: 1 (limit: 2059)
CGroup: /system.slice/dnsmasq.service
└─587 /usr/sbin/dnsmasq -x /run/dnsmasq/dnsmasq.pid -u dnsmasq -r /ru
- The cameras specified in
00-wifi2eth-bridged-rulesshould now be viewable from anywhere in home WiFi with their RTSP URLs e.g.rtsp://rpi.local:2222/cam1_rtsp_stringandrtsp://rpi.local:3333/cam2_rtsp_stringrespectively.
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