References:
- https://kasiviswanathanblog.wordpress.com/2017/05/29/rpi3-as-wifi-routeraccess-point/
- https://learn.pi-supply.com/make/how-to-setup-a-wireless-access-point-on-the-raspberry-pi/
sudo apt-get install dnsmasq hostapdsudo systemctl stop dnsmasq
sudo systemctl stop hostapdKill process /usr/sbin/named, it is the one using port 53 required by dhcpcd
sudo lsof -n -i :53 sudo killall named sudo lsof -n -i :53 # verify nothing is using port 53
Modify /lib/dhcpcd5/dhcpcd and in the 6th line replace "(dhcp|static)" with "(dhcp)"
Add on top of /etc/dhcpcd.conf :
# wlan0 will use static address as AP denyinterfaces wlan0
append to /etc/network/interfaces :
allow-hotplug wlan0
iface wlan0 inet static address 192.168.20.1 netmask 255.255.255.0 network 192.168.20.0 broadcast 192.168.20.255 iface wlan0 inet6 static address 2001:db8::101/64 #iface wlan0 inet manual # wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf #if required add eth0 config #auto eth0
Create /etc/hostapd/hostapd.conf :
interface=wlan0
driver=nl80211 ssid=RPi4 wpa_passphrase=012345678 hw_mode=g channel=6 macaddr_acl=0 ignore_broadcast_ssid=0 auth_algs=1 wpa=2 wpa_key_mgmt=WPA-PSK rsn_pairwise=CCMP ieee80211n=1 wmm_enabled=1 ht_capab=[HT40][SHORT-GI-20][DSSS_CCK-40]
Modify file /etc/default/hostapd :
DAEMON_CONF="/etc/hostapd/hostapd.conf"
Backup dnsmasq config file:
sudo mv /etc/dnsmasq.conf /etc/dnsmasq.conf.backup
Re-create file /etc/dnsmasq.conf :
interface=wlan0 # use interface wlan0
#listen-address=192.168.20.1 # address to listen on dhcp-range=192.168.20.50,192.168.20.150,12h # IPv4 range and lease time dhcp-range=2001:db8::102, 2001:db8::247,12h # IPv6 range and lease time #bind-interfaces # bind to the interface #server=8.8.8.8 # Google DNS server #enable-ra # Enable router advertisement
Modify /etc/sysctl.conf :
net.ipv4.ip_forward=1
Unmask hostapd
sudo systemctl unmask hostapd
sudo systemctl enable hostapd sudo systemctl start hostapd
Reboot the system
Check all services are happily running
sudo service otbr-agent status sudo service dhcpcd status # restart if required sudo service dhcpcd restart sudo service hostapd status # you might need to kill 'named' process again sudo service dnsmasq status
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Without using Access Poing, RPi4 connected to office network via Ethernet
(WORK IN PROGRESS)
Rpi4 :
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 10.10.48.250 netmask 255.255.0.0 broadcast 10.10.255.255 inet6 fe80::dea6:32ff:fee9:f41e prefixlen 64 scopeid 0x20<link> ether dc:a6:32:e9:f4:1e txqueuelen 1000 (Ethernet) wlan0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.20.1 netmask 255.255.255.0 broadcast 192.168.20.255 inet6 fe80::d840:d907:f856:a4cc prefixlen 64 scopeid 0x20<link> inet6 fe80::dea6:32ff:fee9:f41f prefixlen 64 scopeid 0x20<link> inet6 2001:db8::101 prefixlen 64 scopeid 0x0<global> ether dc:a6:32:e9:f4:1f txqueuelen 1000 (Ethernet) wpan0: flags=4305<UP,POINTOPOINT,RUNNING,NOARP,MULTICAST> mtu 1280
inet6 fe80::d840:d907:f856:a4cc prefixlen 64 scopeid 0x20<link> inet6 fdde:ad00:beef::ff:fe00:fc11 prefixlen 64 scopeid 0x0<global> inet6 fdde:ad00:beef:0:8d9d:8fb5:f3c1:4e85 prefixlen 64 scopeid 0x0<global> inet6 fddd:3357:51d7:290b:66cb:14d9:21:8d1 prefixlen 64 scopeid 0x0<global> inet6 fdde:ad00:beef::ff:fe00:c800 prefixlen 64 scopeid 0x0<global> inet6 fdde:ad00:beef::ff:fe00:fc10 prefixlen 64 scopeid 0x0<global> inet6 fdde:ad00:beef::ff:fe00:fc38 prefixlen 64 scopeid 0x0<global>
Laptop :
en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
options=400<CHANNEL_IO> ether 88:66:5a:32:ea:bb inet6 fd16:abcd:ef01:0:49b:3c74:7e8d:9ece prefixlen 64 inet6 fe80::49b:3c74:7e8d:9ece%en0 prefixlen 64 secured scopeid 0x6 inet 10.10.32.92 netmask 0xffff0000 broadcast 10.10.255.255