[GUIDE] How to set Udoo Neo as a bridge

I managed to set a udoo neo as a bridge.
- I bought a Wifi dongle (https://www.amazon.it/DONGLE-FERGUS...ie=UTF8&qid=1498469964&sr=8-1&keywords=rt5370). It's a Ralink rt5370 antenna.

- I installed firmware-ralink package, wpasupplicant and wireless-tools

- Edit /etc/network/interfaces and add wlan0 and wlan1

Code:

# Loopback network interface
auto lo
iface lo inet loopback

# Primary network interface
#auto eth0
#iface eth0 inet dhcp

# USB OTG connection
allow-hotplug usb0
iface usb0 inet static
address 192.168.7.2
netmask 255.255.255.0

auto wlan0
iface wlan0 inet dhcp
wpa-conf /etc/wpa_supplicant.conf

# WiFi
auto wlan1
iface wlan1 inet static
address 192.168.22.1
netmask 255.255.255.0
#hostapd /etc/hostapd/hostapd.conf

- Edit /etc/default/hostapd

Code:

# Defaults for hostapd initscript
#
# See /usr/share/doc/hostapd/README.Debian for information about alternative
# methods of managing hostapd.
#
# Uncomment and set DAEMON_CONF to the absolute path of a hostapd configuration
# file and hostapd will be started during system boot. An example configuration
# file can be found at /usr/share/doc/hostapd/examples/hostapd.conf.gz
#
DAEMON_CONF="/etc/hostapd/hostapd.conf"

# Additional daemon options to be appended to hostapd command:-
#     -d   show more debug messages (-dd for even more)
#     -K   include key data in debug messages
#     -t   include timestamps in some debug messages
#
# Note that -B (daemon mode) and -P (pidfile) options are automatically
# configured by the init.d script and must not be added to DAEMON_OPTS.
#
#DAEMON_OPTS=""

- Edit /etc/hostapd/hostapd.conf

Code:

hw_mode=g
channel=11
driver=nl80211
ssid=my-network-name
interface=wlan1
# possible MAC address restriction
#macaddr_acl=0
#accept_mac_file=/etc/hostapd.accept
#deny_mac_file=/etc/hostapd.deny
#ieee8021x=1    # Use 802.1X authentication
# encryption
wpa=2
wpa_passphrase=my-secret-password
wpa_key_mgmt=WPA-PSK
wpa_pairwise=TKIP CCMP
rsn_pairwise=CCMP
ctrl_interface=/var/run/hostapd
# Only root can configure hostapd
ctrl_interface_group=0

- Install dnsmasq ( apt-get install dnsmasq )

- Edit /etc/dnsmasq.conf and add:

Code:

interface=wlan1
dhcp-range=192.168.22.2,192.168.22.100,2h

- Edit /etc/rc.local and add: (This step may not be necessary)

Code:

rfkill unblock wlan0 && hostapd /etc/hostapd/hostapd.conf

- Remove network-manager (apt-get remove network-manager)

- Edit /etc/default/isc-dhcp-server

Code:

# Defaults for isc-dhcp-server initscript
# sourced by /etc/init.d/isc-dhcp-server
# installed at /etc/default/isc-dhcp-server by the maintainer scripts

#
# This is a POSIX shell fragment
#

# Path to dhcpd's config file (default: /etc/dhcp/dhcpd.conf).
#DHCPD_CONF=/etc/dhcp/dhcpd.conf

# Path to dhcpd's PID file (default: /var/run/dhcpd.pid).
#DHCPD_PID=/var/run/dhcpd.pid

# Additional options to start dhcpd with.
#    Don't use options -cf or -pf here; use DHCPD_CONF/ DHCPD_PID instead
#OPTIONS=""

# On what interfaces should the DHCP server (dhcpd) serve DHCP requests?
#    Separate multiple interfaces with spaces, e.g. "eth0 eth1".
INTERFACES="usb0"

- Edit /etc/dhcp/dhcpd.conf

Code:

default-lease-time 86400;
max-lease-time 8640000;
log-facility local7;

subnet 192.168.7.0 netmask 255.255.255.0 {
    option routers        192.168.7.2;
    option subnet-mask    255.255.255.0;
    range 192.168.7.1    192.168.7.100;
}

#subnet 192.168.100.0 netmask 255.255.255.0 {
#    option routers        192.168.100.1;
#    option subnet-mask    255.255.255.0;
#    range 192.168.100.10    192.168.100.20;
#}

- Enable ip_forwarding with echo

Code:

echo 1 > /proc/sys/net/ipv4/ip_forward

or to make it permanent, edit /etc/sysctl.conf

Code:

net.ipv4.ip_forward=1

 

Thanks for sharing!