Find WAN port & Wireless Interface original MAC addresses

Discussion in 'Tomato Firmware' started by tmr250z, Mar 2, 2009.

  1. tmr250z

    tmr250z Network Guru Member

    I asked this question over on, here, and just want to get people's opinion on this here that use Tomato firmware:

    A couple of months ago, I changed my WAN port & Wireless Interface MAC addresses in order to get a new IP address. I wrote down the original addresses, but somehow I lost the paper where I wrote them down on. Everything works just fine now as is, but I'm just curious if there's a way to find out what the original MAC addresses were?
  2. humba

    humba Network Guru Member

    I think those addresses are written on the box in which your router came.
    Other than that, I'd do a factory reset.. I figure if you change the address all that the router does is calling

    ifconfig br0 down
    ifconfig br0 up hw ether mac-address (or something like that.. I don't recall the syntax offhand)..
    basically the same commands you execute when you fake a mac address in any linux box. Come to think of it, I don't know how Tomato works internally but perhaps simply taking the interface down followed by an up again (problematic for the lan of course.. you'd need to write a script that does the down and up and then run it - or connect from the wan side and run the two commands for the lan side, then connect to the lan side and do the same for the wan side) without specifying a mac address when you take it back up would also do the trick (though I've never tried so I can't say if it really work.. but certainly worth a try if you're unwilling to perform the reset and don't have the box of the router either).
  3. spicoli

    spicoli LI Guru Member

    Isn't there a default button on the Mac Address page?

    Also, usually its a few steps above the router MAC (i.e. xx:xx:xx:xx:xx:3A would be xx:xx:xx:xx:xx:3B for WAN and xx:xx:xx:xx:xx:3C for wireless).
  4. humba

    humba Network Guru Member

    Or that :) why go the easy way when you can go the long way round? ;)
  5. tmr250z

    tmr250z Network Guru Member

    @humba: The only thing on the box is the hardware MAC address. I did a factory reset, erase the NVRAM thoroughly, and held the rest button for 30 seconds, still nothing they remain the same.

    @spicoli: Clicking the default button on the MAC address page doesn't do anything. They're still the same.

    So, any other ideas?
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