I think what they are trying to do in control outbound traffic related to MAC address - it is on the local LAN.
Regards Steven Sporen Snr Network Admin, ECnet | www.ecnet.co.za -----Original Message----- From: Emmanuel Cerisier [mailto:[EMAIL PROTECTED]] Sent: 09 November 2001 02:36 Cc: [EMAIL PROTECTED] Subject: Re: Filtering my MAC address. --------------------- Attention ----------------------------- A digest version of this list is now available. Send email to [EMAIL PROTECTED], with the following message: subscribe gb-users-digest your_email_address Then unsubscribe from this list. ------------------------------------------------------------- GNAT Box User Forum http://www.gnatbox.com/cgi-bin/Ultimate.cgi Send postings to: [EMAIL PROTECTED] Access the list archives at: http://www.gnatbox.com/gb-users/ ------------------------------------------------------------- Myron Szymanskyj wrote: [...] > Think simple with this one. In this instance, the IP and subnet > settings are ignored. If it's an IP protocol transmission, look at > the MAC address and not the IP address, or, look at both. It's one > dirty way of validating that the IP address assigned to a computer is > as it should be. There's no way of retrieving a MAC address from a computer not on the local network looking into packets of standard IP services (i.e. http, ftp, etc.). As Tom said, MAC addresses provide layer 1-2 information only and thus don't pass through routers. The unique MAC address of the all IP packets you will be receiving on the EXT interface of your gnatbox is likely to be your ISP router's. -- M. ---------------------------------------------- To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe gb-users your_email_address in the body of the message
