wlan0 hw address changes

From	Lucio Crusca <lucio@sulweb.org>
Newsgroups	linux.debian.user
Subject	wlan0 hw address changes
Date	2017-03-07 14:00 +0100
Message-ID	<timSC-7EZ-15@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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I need to tell a network admin the hardware address of my wlan0 
interface, so that he gives me access to the wifi network. The problem 
is that the hw address is changing everytime I use the wlan0 hardware 
switch...

# ifconfig wlan0

wlan0: flags=4098<BROADCAST,MULTICAST>  mtu 1500
         ether b2:ad:31:c5:86:36  txqueuelen 1000  (Ethernet) ...

I bring it up using the hardware switch, then

# ifconfig wlan0

wlan0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
         inet6 fe80::c2cb:38ff:fe4c:568f  prefixlen 64  scopeid 0x20<link>
         ether c0:cb:38:4c:56:8f  txqueuelen 1000  (Ethernet) ...

I switch it off again, then

# ifconfig wlan0

wlan0: flags=4098<BROADCAST,MULTICAST>  mtu 1500
         ether aa:c3:d0:e1:43:cb  txqueuelen 1000  (Ethernet) ...

and so on... what is changing the hw address? How do I stop it?

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Thread

wlan0 hw address changes Lucio Crusca <lucio@sulweb.org> - 2017-03-07 14:00 +0100
  Re: wlan0 hw address changes Dominik George <nik@naturalnet.de> - 2017-03-07 15:10 +0100
    Re: wlan0 hw address changes <tomas@tuxteam.de> - 2017-03-07 15:30 +0100
    Re: wlan0 hw address changes Lucio Crusca <lucio@sulweb.org> - 2017-03-07 18:30 +0100
      Re: wlan0 hw address changes Dominik George <nik@naturalnet.de> - 2017-03-07 23:10 +0100
        Re: wlan0 hw address changes Lucio Crusca <lucio@sulweb.org> - 2017-03-08 21:40 +0100
          Re: wlan0 hw address changes Lucio Crusca <lucio@sulweb.org> - 2017-03-09 10:00 +0100
  Re: wlan0 hw address changes Hans <hans.ullrich@loop.de> - 2017-03-07 17:20 +0100
    Re: wlan0 hw address changes Lucio Crusca <lucio@sulweb.org> - 2017-03-07 17:50 +0100
      Re: wlan0 hw address changes <tomas@tuxteam.de> - 2017-03-09 10:30 +0100
        Re: wlan0 hw address changes Lucio Crusca <lucio@sulweb.org> - 2017-03-09 13:10 +0100

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