How can Y set squid to allow the internet acces by mac address and where y can find the file that Y need to edit.

why mac address ???
you can use ip address for the same need.

tell me if you are some thing,it's very interesting.

you can assign my mac address so regardless of the IP address if the mac address is unique per computer....

so if your mac is XX:XX:XX:XX and you're on a dialup modem, you'll probably get a different IP every time you dialup but the mac address will stay the same... it's for security...

I don't believe MAC is forwarded across internet, only LAN.

Yes, you can setup squid to allow the internet acces by mac address.

NOTE: Squid can only determine the MAC address for clients that are on the same subnet. If the client is on a different subnet, then Squid can not find out its MAC address.

To use ARP (MAC) access controls, you first need to compile in the optional code. Do this with the --enable-arp-acl configure option:

% ./configure --enable-arp-acl ...
% make clean
% make
If src/acl.c doesn't compile, then ARP ACLs are probably not supported on your system.

If everything compiles, then you can add some ARP ACL lines to your squid.conf:

acl M1 arp 01:02:03:04:05:06
acl M2 arp 11:12:13:14:15:16
http_access allow M1
http_access allow M2
http_access deny all

-/Hitesh

thank you for the advices. i really must know how to administrate my network.

There are lots of Network monitoring tools. you can refer following link at,

http://www.slac.stanford.edu/xorg/nmtf/nmtf-tools.html

Let us know if you have any further query.

-/Hitesh