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TOPIC: About MAC address

About MAC address 14 years 8 months ago #4490

  • Fahad
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my question is regarding MAC address, as it is said that MAC address is brunt in to the Lan Card, is it also brunt in to the Modem?
and how can i get my MAC address ?



Re: About MAC address 14 years 8 months ago #4491

bring up a command window and type ipconfig/all

look for the physical address for your NIC card and thats your mac address!

Re: About MAC address 14 years 8 months ago #4675

hi Fahad,
i'm a beggineer too, so correct me if i'm wrong.

yes, MAC address is burnt into our NIC, more specific, it lies in the ROM. and we can use the command ipconfig/all in the command line, you are using windows. I'm not so sure about linux, because i never use one.

well, modem don't have any physical addressing. Many people says that modem are Layer 1 device in OSI Layer, where NIC are considered in Layer 2 device.

and for your additional information, we can burnt again and change our MAC address, of course this is using special device, to burn again in the ROM. But we have to change the 46'th bit, from 0 to 1.

or, we can use some software to do that, to change our mac address. Some people used this to tricky the ISP's. but i forgot what the name it is.

hope i'm not talking about nonsense here,

Re: About MAC address 14 years 8 months ago #4680

no endoch, you're not talking nonsense.. thats complelely correct. Modems dont have a MAC address as they are physical layer devices (performing modulation of signals from analog to digital).

Yes you can reburn your ROM, but thats not worth the effort, there are enough ways to clone or spoof a MAC address through software.

Btw in linux the command to view your mac address (as well as IP address etc) is

[sahirh@ozzy sahirh]$ /sbin/ifconfig

eth0 Link encap:Ethernet HWaddr 00:03:47:77:58:7A
inet addr: Bcast: Mask:
RX packets:217916 errors:0 dropped:0 overruns:0 frame:0
TX packets:220698 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:53482886 (51.0 Mb) TX bytes:18266661 (17.4 Mb)
Interrupt:11 Base address:0xdf00 Memory:ff8ff000-ff8ff038

Theres an example, its the 'HWaddr' part.

Sahir Hidayatullah. Staff - Associate Editor & Security Advisor
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