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How to enable wireless in a FreeBSD System asumming you have an atheros chipset:
Go to /boot/loader.config and enable the following modules to be loaded:
if_ath_load="YES"
wlan_scan_ap_load="YES"
wlan_scan_sta_load="YES"
wlan_wep_load="YES"
wlan_ccmp_load="YES"
wlan_tkip_load="YES"
You need to create the following file:
/etc/wpa_supplicant.conf with the following information:
network={
ssid="your_wireless_net_ID"
psk="your_wireless_password"
}
After this go to /etc/rc.conf and add this to it:
ifconfig_ath0="WPA DHCP"
Reboot or # /etc/netstart and you are ready to go, enjoy your wireless network under FreeBSD DesktopBSD etc.
In case you are using dhcp and don't get any ip addr just run dhclient ath0.