wlan0 auto-connecting to any open wifi

[aeuii at posteo.de]

Hello freebsd-wireless,

I would like to prevent a USB Wifi card from automatically connecting
to an unencrypted network nearby.  It happens whenever the card is
plugged to the USB port and the wlan0 interface is brought up.  After
a few seconds it's connected to the first unencrypted net it can find.
How could it be stopped?

Thanks for help!

Stefan


freebsd-version:
11.0-RELEASE-p8

rc.conf:
wlans_urtw0="wlan0"
ifconfig_wlan0="NOAUTO"
ifconfig_urtw0="NOAUTO"

dmesg:
ugen0.2: <vendor 0x0bda> at usbus0
urtw0: <vendor 0x0bda product 0x8187, class 0/0, rev 2.00/1.00, addr 4> on usbus0
urtw0: unknown RTL8187L type: 0x8000000
urtw0: rtl8187l rf rtl8225u hwrev none
wlan0: Ethernet address: xx:xx:xx:xx:xx:xx
wlan0: link state changed to UP