how do I find what MAC address web pages see as my MAC address

rob.rice · 05-28-2010, 03:52 PM

or to put it another way how do I find out what MAC address is being sent out as mine

AlucardZero · 05-28-2010, 04:02 PM

Web sites don't see MAC addresses. Those don't make it past your local subnet.

smeezekitty · 05-28-2010, 04:03 PM

AFAIK Wesites cannot see your mac address, just your ip. ' http://whatismyipaddress.com/ '

HasC · 05-28-2010, 04:06 PM

MACs are Layer2 addresses, they're seen only on subnets. What the webserver will see from you will be your IP, or your gateway's IP, your Layer3 address, (all assuming you're using TCP/IP, of course)

rob.rice · 05-28-2010, 04:10 PM

IF I told you guys how I know that web sites can see your MAC address I would be baned from this forum

Robhogg · 05-28-2010, 04:16 PM

No. The web server will see a source MAC address, but this will be the MAC address of the gateway on the server's subnet, not your MAC address.

Slight correction: I have found a site that gives a method for getting it, using JavaScript. However, it:

Works on Internet Explorer only
Internet Explorer security settings should allow creating ActiveX Objects
WMI scripting library is installed on the client machine

So, the web server cannot get the MAC directly (unless the client is on the same subnet). It may persuade the client to give up the information, but it would be fairly easy for users to prevent.

rob.rice · 05-28-2010, 04:33 PM

Quote:

Originally Posted by Robhogg

No. The web server will see a source MAC address, but this will be the MAC address of the gateway on the server's subnet, not your MAC address.

MAC addresses are a touchy subject for forum admins but I can tell you that is not the case
I'm walking close to black hat stuff here
but I can tell you that YOUR hardware is sending out a MAC address for the world to see

smeezekitty · 05-28-2010, 04:51 PM

Quote:

Originally Posted by rob.rice

IF I told you guys how I know that web sites can see your MAC address I would be baned from this forum

Probably not.
but i am sure you will get your post deleted, thread locked and a nasty note from the mods.

AlucardZero · 05-28-2010, 04:52 PM

rob.rice · 05-28-2010, 04:53 PM

Quote:

Originally Posted by smeezekitty

Probably not.
but i am sure you will get your post deleted, thread locked and a nasty note from the mods.

I have already been warned about this YES I WILL

Robhogg · 05-28-2010, 05:32 PM

Quote:

Originally Posted by rob.rice

MAC addresses are a touchy subject for forum admins but I can tell you that is not the case
I'm walking close to black hat stuff here
but I can tell you that YOUR hardware is sending out a MAC address for the world to see

So, you start a thread asking how a web server can get a client's MAC address. Then, when you're told it can't, you hint that secretly you know a way that it can. But you do nothing but hint about this dark and secret method.

Your assertion conflicts with everything I know about networking. I have tried searching the web for a way to do it and found nothing, without using client-side code to send the info out.

I am not persuaded.

rob.rice · 05-28-2010, 05:33 PM

Quote:

Originally Posted by Robhogg

No. The web server will see a source MAC address, but this will be the MAC address of the gateway on the server's subnet, not your MAC address.

Slight correction: I have found a site that gives a method for getting it, using JavaScript. However, it:

Works on Internet Explorer only
Internet Explorer security settings should allow creating ActiveX Objects
WMI scripting library is installed on the client machine

So, the web server cannot get the MAC directly (unless the client is on the same subnet). It may persuade the client to give up the information, but it would be fairly easy for users to prevent.

it depends on the client if it's a local router running firmware the router would need to be reflashed if it's a linux computer the MAC address can be set in the network configuration files (spoofed)
what I don't know is witch device is sending out the MAC address to the web
I know that my broad band router sends out the NIC's addresses of the local computers BUT I don't know about my wifi router
is it sending it's MAC address or forwarding the NIC's addresses of the local computers

rob.rice · 05-28-2010, 05:43 PM

Quote:

Originally Posted by Robhogg

So, you start a thread asking how a web server can get a client's MAC address. Then, when you're told it can't, you hin that secretly you know a way that it can. But you do nothing but hint about this dark and secret method.

Your assertion conflicts with everything I know about networking. I have tried searching the web for a way to do it and found nothing, without using client-side code to send the info out.

I am not persuaded.

MAC address are used by some web sites to control access because most
ISPs use dynamic IP addresses
so a IP address dose not identify some one reliably BUT a MAC addresses
do

unSpawn · 05-28-2010, 05:44 PM

Quote:

Originally Posted by rob.rice

IF I told you guys how I know that web sites can see your MAC address I would be baned from this forum

No you wouldn't because, as explained before, MAC addresses don't end up on the 'net.

rob.rice · 05-28-2010, 06:05 PM

Quote:

Originally Posted by unSpawn

No you wouldn't because, as explained before, MAC addresses don't end up on the 'net.

OK then how do you enforce bans
every time I reset my network connection with my ISP I get a new IP address
dose this mean I can just set up a new account as a way around the ban?