Tested with Intel network adapters on OpenBSD 6.4
Configure your local network (enable Wi-Fi access point in WPA2 mode, DHCP server, and router).
Install OpenBSD on your computer.
It should works out of the box.
OpenBSD has em(4) driver for Intel Ethernet network adapter and as in case with many other network drivers em0 network interface should be configured by OpenBSD installer. You can change the configuration anytime.
# echo 'dhcp up' > /etc/hostname.em0 # # chown root:wheel /etc/hostname.em0 # chmod 0640 /etc/hostname.em0 # # sh /etc/netstart em0: no link... got link em0: bound to 192.168.1.2 from 192.168.1.1 (yy:yy:yy:yy:yy:yy) #
OpenBSD has iwm(4) driver for Intel Wireless network adapter, but it requires firmware files as most of wireless drivers.
OpenBSD runs fw_update(1) to install a prepackaged version of the
firmware on the first boot, but you can run fw_update anytime,
make sure your Ethernet network is up.
# fw_update iwm-firmware-0.20170105: ok #
Write your network configuration (incl. password) to hostname.if(5) and run netstart(8) to start up network.
# echo 'join Home wpakey p@ssw0rd dhcp up' > /etc/hostname.iwm0 # # chown root:wheel /etc/hostname.iwm0 # chmod 0640 /etc/hostname.iwm0 # # sh /etc/netstart iwm0: no link... got link iwm0: bound to 192.168.1.2 from 192.168.1.1 (yy:yy:yy:yy:yy:yy) #
Scan to find Wi-Fi networks near you with ifconfig(8). Update your network configuration and start up network.
#
# ifconfig iwm0 up
# ifconfig iwm0 scan
iwm0: flags=8843 mtu 1500
lladdr xx:xx:xx:xx:xx:xx
...
status: no network
ieee80211: nwid ""
nwid Work chan 2 bssid yy:yy:yy:yy:yy:yy 85% HT-MCS23 privacy,short_preamble,short_slottime,radio_measurement,wpa2
#
# echo 'join Home wpakey p@ssw0rd
join Work wpakey @n0th3r0n3
dhcp
up' > /etc/hostname.iwm0
#
# sh /etc/netstart
iwm0: no link... got link
iwm0: bound to 10.0.1.2 from 10.0.1.1 (zz:zz:zz:zz:zz:zz)
#
For computers with two or more Ethernet and Wi-Fi network adapters you can configure trunk(4) pseudo-device to create a link failover interface.
With this configuration when Ethernet is connected OpenBSD uses em0 interface, otherwise it tries to connect to one of Wi-Fi networks via iwm0.
# echo 'up' > /etc/hostname.em0 # # echo 'join Home wpakey p@ssw0rd join Work wpakey @n0th3r0n3 up' > /etc/hostname.iwm0 # # echo 'trunkproto failover trunkport em0 trunkport iwm0 dhcp up' > /etc/hostname.trunk0 # # chown root:wheel /etc/hostname.* # chmod 0640 /etc/hostname.* # # sh /etc/netstart trunk0: no link... got link trunk0: bound to 192.168.1.2 from 192.168.1.1 (yy:yy:yy:yy:yy:yy) #
Shout down all network interfaces: em0, iwm0, and remove trunk0. Reset the routing tables.
# ifconfig em0 down # ifconfig iwm0 down # ifconfig trunk0 destroy # route -n flush #
Check your /etc/hostname.* files as described in the previous
section.
Then start up the network, check the statuses of all the network interfaces with ifconfig(8), check address resolution protocol (ARP) entries with arp(8), check the routing tables with route(8), and ping(8) your default gateway.