[$_SERVER['REMOTE_ADDR'] Help]

Gave that a shot with...

 

<?php
#$IP="192.168.1.18";
$IP=$_SERVER['REMOTE_ADDR'];
var_dump($IP);
?><br /><?php
exec("ping -c 1 -s 1 $IP");
$ans=exec("/usr/sbin/arp -an | /bin/grep $IP | /usr/bin/awk '{print $4}'");
echo "$IP - $ans";
?>

 

and got

 

string(12) "192.168.1.30"
192.168.1.30 -

 

Still no idea why I can't pass it to exec correctly. I'm just trying to get the basic mechanism of getting the mac address in place. Will validate any input at a later stage though.

[$_SERVER['REMOTE_ADDR'] Help]

Hello,

 

I am trying to detemine the MAC address of a machine on a local network from the IP address.

The following code does exactly that.

 

<?php
$IP="192.168.1.18";
exec("ping -c 1 -s 1 $IP");
$mac=exec("/usr/sbin/arp -an | /bin/grep $IP | /usr/bin/awk '{print $4}'");
echo "$IP - $mac";
?>

 

However I need to take the IP address from an HTML form. When using the $_SERVER['REMOTE_ADDR'] variable seems to screw things up for me. Maybe its not the correct type of variable? For example the following will not work.

 

<?php
$IP=$_SERVER['REMOTE_ADDR'];
exec("ping -c 1 -s 1 $IP");
$mac=exec("/usr/sbin/arp -an | /bin/grep $IP | /usr/bin/awk '{print $4}'");
echo "$IP - $mac";
?>

 

Can anyone explain why this is? Our suggest an alternative method of doing this?

 

Regards,

Colin

[Using php in a similar way to using /etc/hosts file]

Hello,

 

I am looking for a push in the right direction. I would like to be able to view a website that is duplicated on many servers by specifying the IP address. Similar to how one would use the hosts file.

 

I can do this using netcat

nc 1.2.3.4 80

Host: example.com

GET /contact-us.html

<CR><CR>

 

Can someone tell me how I would go about porting this to PHP? I would just like to set up a small page on my webserver where I can enter the domain and IP address and have the page displayed back to me.

 

Thanks Colin