getting mac address of client machines

[pradeepjain]

so we cannot generally find the MAC id's of a machine connected to net as one of the problems will be permission!

[Dormilich]

do you get the same result if you try

$mac = `arp -a | grep $ip`;

?

[pradeepjain]

do you get the same result if you try

$mac = `arp -a | grep $ip`;

?

yeah!!!permissi on error!

[Dormilich]

then you can’t do anything about it (although the concept is right)

[pradeepjain]

is there any parameter by which we can recognize a system over internet ?

[Dormilich]

recognize in what kind of way?

[pradeepjain]

like suppose if that system is accessing ma website its should be identified by unique thing specific to that comp! bcos we need to lock our website for a few ips' of outside internet!

[Dormilich]

what is a "comp", company, computer, competitor?

do you mean allow certain IPs or exclude certain IPs?

[pradeepjain]

sorry for shortcuts..i mean to say a computer /pc

[Dormilich]

is there anything specific about allowed/denied computers/clients?

[pradeepjain]

its like the website will be accessed at only 2 places say 2 hospitals so need to lock them to those places!

[pradeepjain]

IS there no solution for this problem . like i am using all linux machines . cant i uniquely identify the system accessing it .something like system ID / CPU ID.

[Dormilich]

why should the system ID / CPU ID be submitted? you can’t read what’s not provided.

if those computers have static IPs, you can use those.

[pradeepjain]

nope !! but they use laptops for accessing the site. so they dont have a static IP's .

[missinglink]

This functionality will work on a local network, but not the internet as the MAC is hidden by the clients router.

In short, the MAC is not present in the IP packet header.

You can retrieve the client IP address via <?php echo $_SERVER['REMOTE_ADDR']; ?> however this is not 100% accurate because of IP address spoofing.