Is there any way to change the MAC address of a machine? IP address is
assigned by ISP. My understanding is that IP address is based on the
MAC address of a machine, is that correct concept?
please advise. thanks!!
please advise. thanks!!
Of most machines, Yes.
:IP address is assigned by ISP. My understanding is that IP address is
:based on the MAC address of a machine, is that correct concept?
It might be, it might not be, it depends on the ISP. Some ISPs know
what port number you are using in their equipment and assign the
address on that basis.
Some ISPs encrypt traffic to the modem based upon your MAC address,
so changing your MAC address might get you nothing.
The ISPs that do use MAC as a factor often register the MAC against the
account, and you might have to find the MAC of a valid subscriber
to change the IP you get. But ISPs tend to have protections against that.
Many food scientists have reported chocolate to be the single most
craved food. -- Northwestern University, 2001
cross posted to 4 newsgroups. Gosh, this must be terribly important.
Rubbing my crystal ball, I deduce that you're using some Linux or
Windoze mutation. Of course, all operating system are the same so the
following instructions should work no matter what you're using.
Here's an article that covers most of the methods.
ifconfig eth0 hw ether 11:22:33:44:55:66
Correct. If you're a spammer and want to cover your tracks, this is aQuote:>Is there any way to change the MAC address of a machine? IP address is
>assigned by ISP. My understanding is that IP address is based on the
>MAC address of a machine, is that correct concept?
Free advice. Don't do it.Quote:>please advise. thanks!!
|>:Is there any way to change the MAC address of a machine?
|>:Of most machines, Yes.
|how to change the MAC address then?
You have cross-posted this to a variety of newsgroups, including
- one for Windows XP (which runs only on systems with the Intel Pentium
instruction set, as far as I know)
- one for wireless devices, many of which use specialized CPUs and
specialized network cards
- a linux networking newsgroup; linux runs on a quite wide variety of
- a group devoted to the TCP and UDP protocol suite.
Considering the multitude of hardware devices implied by your choice
of newsgroups, one must presume that you are looking for some
standard TCP or UDP or ICMP packet that one can send which will
trigger the change of MAC address.
No such TCP / UDP / ICMP packet exists.
No POSIX standard socket call exists that would change MAC addresses
All facilities to change MAC addresses are specific to the combination
of hardware and OS that one has. I thus recommend that you post
to a newsgroup specific to your hardware and software, stating the
equipment you have, and soliciting information there. Or, better yet,
google for the information, as it is readily available for common
equipment + software combinations.
The ordering of results sorted by date is approximate.
Many IPv6 address contain real 48-bit IEEE addresses, but many othersQuote:> In IPv6, the MAC address forms part of the IP address.
% host -t aaaa dcc.dcc-servers.net
dcc.dcc-servers.net has IPv6 address 2001:888:20ee::6277
Look for SMAC 1.2Quote:> how to change the MAC address then?
We are running Solaris 9 and have configured the one physical NIC with
2 IP addresses allowing us to run 2 web servers and keep both on port
80. Is changing the IP address assigned to each host as simple as
changing the entries in /etc/inet/hosts or do I need to start messing