AW: [PHP] MAC Address

There is just one little thing I'd like to add, I've seen a program that allows you to change yout MAC, even under windows with *inux it's supposed to work quite some time. So it's easy to adjust your Mac address. Personally I'd never use this software, as I'm nervous about loosing my set up, but people in my team have successfully used it. So the info about somebodies mac is useless Jan > -----Ursprüngliche Nachricht----- > Von: Jason Sheets [mailto:jsheets@shadonet.com] > Gesendet: Montag, 5. Mai 2003 15:39 > An: Chris Hewitt > Cc: Urb LeJeune; php-general@lists.php.net > Betreff: Re: [PHP] MAC Address > > > The MAC address is not unique for each card, it is supposed to be but > hardware hardware manufacturers ran out of unique mac addresses some > time ago. They are now re-using mac addresses with the knowledge that > the liklihood of the same MAC making its way onto the same LAN is > extremely low. > > The MAC is a local area network hardware identificater for local area > network use, not for the Internet. Even if you could get the MAC you > shouldn't use it as a unique identifier because most operating systems > let you change your mac to whatever mac you want (software vs burned in > MAC). > > You should find another way to uniquely identify the computer, consider > using client side SSL certificates. > > Chris Hewitt wrote: > > > Urb LeJeune wrote: > > > >> > >>> oh dear i'd like to know this too , as getting an ip is quite > >>> tedious if the > >>> proxy blocks it > >> > >> > >> > >> Just a little background. The MAC address is unique for each > >> computer. Would be perfect to determine if a user has already voted > >> in a poll or something like that. Much more reliable indicator than an > >> IP address. Microsoft is now using the MAC address when issuing > >> passwords for installing software. > > > > > > > > The MAC address is unique for each ethernet card, is there an > > equivalent for e.g. a serial dial-up interface? Change the network > > card (or buy a new computer) and you have a different MAC address. > > > > HTH > > Chris > > > > > > > > -- > PHP General Mailing List (http://www.php.net/) > To unsubscribe, visit: http://www.php.net/unsub.php > > >