>Hello,
>
>that's what I wanna find out:
> The MAC (that's something like a unique network-card number)
It is not "like a". it IS unique - each manufacture of network cards have
there own prefix number, and then the manufacture is responsible to ensure
that each network adapter has it own MAC (a.k.a. ARP address).
To know the ARP address of your own network card type 'ipconfig /all' in
command shell (applies for NT). You will then find the physical address of
the network card (IP address is referred to as the logical address).
In an unix environment you can uses '/usr/sbin/arp -a' to find out the ARP
address of nearby computers.
> address of a remote user. I just know I can find it out by
> backtracing his IP address. But which function to use?
I don't remember what information that was included in the Ethernet package,
but I would guess you might find the ARP address there as well.
>By this MAC address you can identify any user, no matter which
>IP address he uses and what time is between his visits (and no
>matter which browser he has used, then).
>Sessions, cookies etc. aren't enough as they aren't as secure
>as identifying by MAC is. (I know, you can change this number on
>certain cards, but this isn't as easy and common as deleting
>cookies, hmm?)
So what do you do if you have 10 users from a the very same Unix host then?
They will all have the same ARP address, and you wont be able to distinguish
between them...
>Does someone know how can I find it out?
>Or has maybe someone an idea how to find out the route the IP
>packages come? (like "tracert" or "route" in windows)("NeoTrace")
use ping, or study how ICMP (Internet Control Message Protocol) works. ICMP
is part of the TCP/IP protocol family, and you can find information about it
the RFC archives.
>I would thank for any suggestion,
>
> Mark
>
>
>
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