MAC addresses in JavaScript

Question

I know that we can get the MAC address of a user via IE  ActiveX objects    Is there a way to obtain a user s MAC address using JavaScript

User · Accepted Answer

I concur with all the previous answers that it would be a privacy security vulnerability if you would be able to do this directly from Javascript  There are two things I can think of    Using Java  with a signed applet  Using signed Javascript  which in FF  and Mozilla in general  gets higher privileges than normal JS  but it is fairly complicated to set up

User · Answer

Nope  The reason ActiveX can do it is because ActiveX is a little application that runs on the client s machine   I would imagine access to such information via JavaScript would be a security vulnerability

User · Answer

The quick and simple answer is No   Javascript is quite a high level language and does not have access to this sort of information

User · Answer

i was looking for the same problem and stumbled upon the following code   How to get Client MAC address Web    To get the client MAC address only way we can rely on JavaScript and Active X control of Microsoft It is only work in IE if Active X enable for IE  As the ActiveXObject is not available with the Firefox  its not working with the firefox and is working fine in IE   This script is for IE only    x000D   x000D  function showMacAddress     x000D      var obj   new ActiveXObject  WbemScripting SWbemLocator    x000D      var s   obj ConnectServer       x000D      var properties   s ExecQuery  SELECT   FROM Win32 NetworkAdapterConfiguration    x000D      var e   new Enumerator properties   x000D      var output  x000D      output     lt table border  0  cellPadding  5px  cellSpacing  1px  bgColor   CCCCCC  gt    x000D      output   output     lt tr bgColor   EAEAEA  gt  lt td gt Caption lt  td gt  lt td gt MACAddress lt  td gt  lt  tr gt    x000D      while   e atEnd      x000D          e moveNext    x000D          var p   e item    x000D          if   p  continue  x000D          output   output     lt tr bgColor   FFFFFF  gt    x000D          output   output     lt td gt     p Caption     lt  td gt    x000D          output   output     lt td gt     p MACAddress     lt  td gt    x000D          output   output     lt  tr gt    x000D        x000D      output   output     lt  table gt    x000D      document getElementById  box   innerHTML   output  x000D    x000D   x000D  showMacAddress    x000D   lt div id  box  gt  lt  div gt  x000D   x000D   x000D

User · Answer

If this is for an intranet application and all of the clients use DHCP  you can query the DHCP server for the MAC address for a given IP address

User · Answer

No you cannot get the MAC address in JavaScript  mainly because the MAC address uniquely identifies the running computer so it would be a security vulnerability   Now if all you need is a unique identifier  I suggest you create one yourself using some cryptographic algorithm and store it in a cookie   If you really need to know the MAC address of the computer AND you are developing for internal applications  then I suggest you use an external component to do that  ActiveX for IE  XPCOM for Firefox  installed as an extension

[javascript] MAC addresses in JavaScript

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