Unrecognised device, MAC address all zeros

Started by Ken


Unrecognised device, MAC address all zeros   04 April 2013, 04:07

WiFi Gaurd keeps finding an unrecognized device with Mac address 00-00-00-00-00-00, Vendor Xerox Corporation. My Modem which also handles my WiFi shows no such device connected or ever having been connected. Should I be concerned?
SoftPerfect Support forum - Andrew avatar image

unrecognised device   04 April 2013, 13:03

No, it sounds more like a bug in the WiFi Guard. What version are using?

unrecognised device   04 April 2013, 15:29

I am using version 1.0.2

00-00-00-00-00-00 MAC address [was: unrecognised device]   07 April 2013, 17:37

This also looks like a bug to me.

For me, all devices except my computer are shown as MAC address 00-00-00-00-00-00.
[image expired]

Ubuntu 12.04.2 LTS (i386), WiFi Guard 1.0.2
SoftPerfect Support forum - Andrew avatar image

unrecognised device   09 April 2013, 01:22

It definitely shouldn't be like this.

Could you please take a screen shot or post the text output of the arp -van command when the WiFi Guard happens to show zero MAC addresses?

00:00:00:00:00:00 MAC address   18 May 2013, 12:33

I can confirm that arp shows the correct MAC address whereas SoftPerfect WiFi Guard still shows 00:00:00:00:00:00 on a network with only two devices (my laptop and router).
SoftPerfect Support forum - Andrew avatar image

unrecognised device   18 May 2013, 15:51

On what system? Linux, Mac OS, Windows?

unrecognised device   27 July 2013, 01:39

I too have exactly this problem; an unrecognized Xerox Corp device, MAC 00-00-00-00-00-00. So did someone on this forum in Nov 2012. I guess just a harmless bug.
rajnath oberoi

unrecognised device   09 August 2013, 15:13

First of all WiFi Guard is awesome! It works beautifully! Thanks!

Today it found this device on my network. 00-00-00-00-00-00 --- XEROX CORPORATION

My net connection was getting disconnected frequently and so today I disconnected the router and used my modem to connect directly to find WiFi Guard warning me of this unrecognized device. I was surprised because WiFi Guard did not find any such device before when I was connecting through my router. Would it be possible for WiFi Guard to BLOCK such unknown devices? Do let us know ...

And excellent product - thanks!
SoftPerfect Support forum - Andrew avatar image

unrecognised device   12 August 2013, 00:41

Unfortunately this is not really possible to block those devices from our software.

Your router however may have this feature, just log into its web-interface and look for something like 'MAC address filter' or 'blacklist', where you can block these devices.

Note though, that in this case WiFi Guard was unable to determine the correct MAC address. Perhaps you can see it in the router's interface.

Re: unrecognised device   30 November 2013, 20:38

Windows 8.1 Pro Wifi Guard 1.03 version (1.02 was fine) started giving the same message about Xerox that I don't have with 00-00-00-00-00-00 on my wifi network card although I use LAN card mainly.
SoftPerfect Support forum - Andrew avatar image

Re: unrecognised device   30 November 2013, 21:32

Please try the latest build.

Re: unrecognised device   01 December 2013, 04:00

I just sent an email to SoftPerfect about this exact thing on OUR system. It didn't show up at first. I installed the WiFi guard about two weeks ago and all of a sudden TODAY the XEROX thing shows up. No MAC address. And I've got NO idea where this is showing up from. Apparently many of us are finding this 'announcement'. Sure would be nice to lay this to rest - somehow.
I bet you have a printer in your house or somewhere nearby that someone tried to WPS to your network. That printer then went into AP mode and is essentially acting like your main AP, hence having the same SSID. This seems to be what happened to me recently although I am still investigating.

Re: Unrecognised device, MAC address all zeros   20 December 2014, 00:43

I have the problem X4 addresses. All show 0 for Mac and xerox Corp for provider. Don't use Wifi guard and don't have a WPS printer connection.
Can not get them to go away even across restart. Shows wifi signal in wifi analyzer but no content on scope.

Any ideas how to get rid of this?
SoftPerfect Support forum - Andrew avatar image

Re: Unrecognised device, MAC address all zeros   20 December 2014, 22:39

Use the latest version (1.0.5)

Re: unrecognised device   14 January 2015, 05:27

I have this same thing with an unknown mac address with all 0 s. You said your network was down. You have a computer hacker shutting your network down by using probably aircrack which deauthenticates your device then he takes your mac address for that device so he can connect to your wifi. If you are using a router with WPS make sure it is disabled. I suggest getting a router without WPS. I still have hackers across from my street .
Divan Williamson

Re: Unrecognised device, MAC address all zeros   16 January 2018, 19:21


I am experiencing the same problem, although I have a Dell Sonicwall and on the traffic monitor it gives me the MAC for the Video Conferencing device, namely a Huawei TE20, but also it has an entry on the same IP address with the MAC address 00:00:00:00:00:00 and the Src Vendor is Xerox Corporation.

I have changed the IP address on the VC as we have no Xerox printer in the building. Sure as bob the Xerox corporation IP on the traffic monitor also changed to the same IP address, but suddenly has a lot more entries using different ports. I'm thinking either it is hacked or there sits a controller inside the Huawei which is the xerox, although the former seems more likely. Any ideas on what it could be?

The issue is that every conference call, to the second, it cuts out on 15 minutes and 7 seconds. Everytime.
SoftPerfect Support forum - Andrew avatar image

Re: Unrecognised device, MAC address all zeros   16 January 2018, 21:13

That is probably a very old version of WiFi Guard, which contained a bug that resulted in some MAC addresses being reported as 00:00:00:00:00:00.

Historically a zero MAC address was allocated to Xerox, that's why it's reported as Xerox, but it's really just a bug in WiFi Guard. The newer versions don't have this issue.

Reply to this topic

Sometimes you can get the answer faster if you try the forum search and/or have a look at the software user manual to see if your question has already been answered.

Our forum rules are simple:

  • Be polite.
  • Do not spam.
  • If possible, check your spelling and grammar.




A brief and informative title for your message, approximately 4–8 words:


Spam prevention: please enter the following code in the input field below.

 **     **  ********  **     **  **     **  **     ** 
 **     **  **        **     **  ***   ***  ***   *** 
 **     **  **        **     **  **** ****  **** **** 
 **     **  ******    **     **  ** *** **  ** *** ** 
  **   **   **         **   **   **     **  **     ** 
   ** **    **          ** **    **     **  **     ** 
    ***     **           ***     **     **  **     **