When a new or existing PC connects to your network, it will broadcast an “DHCP Discover” packet onto your LAN or subnet looking for a DHCP server. Once a client has requested an IP address, configuration parameters and scope information, the DHCP server assigns it an available IP address from a pool of addresses in the scope given by an administrator. How Does DHCP Work?Ī DHCP server listens on the network for any DHCP client (a host computer) to request an address and services. A DHCP database can be located on a DCE NetServer running Windows 2000/2003 Server or locate it on an individual computer using Dynamic DNS service such as ddclient (a Perl based solution). You also have the ability to centrally manage your IP addresses which is an added benefit over static addressing. The biggest advantage to use DHCP over static addressing is ease-of-maintenance when your network grows or shrinks. Although both work on the same concept, it has different implementations of vendor specific options (VSOPs), user classes, lease periods etc. Version 1 only provided IP addresses to hosts and version 2, which is being used in Microsoft Windows 2000 & 2003 Server operating system offers more features. There are two versions of DHCP: v1 and v2. DHCP can be used on networks using TCP/IP for automatic IP address assignment. I don't really think this says anything about Net::ARP as 90 percent of CPAN packages tend to be a pain in my ass on my mac.DHCP (Dynamic Host Configuration Protocol) is a protocol that automatically provides an Internet Protocol (IP) host with its IP address and other related configuration information such as the subnet mask and default gateway. Ps the command to check the arp table is arp -aĬaveat: I was not able to get Net::ARP to install cleanly on my mac from CPAN, so I used Fedora. If you liked this, you will probably also like these two: My $mac = Net::ARP::arp_lookup($dev, $targetOne)

Either are likely to set of an IDS or IPS, however a ping scan is always the more obnoxious of the two.Ĭaveat: You need Net::ARP installed for this to work: It would also be nice if you did some sort of arp or ping scan before using it. However it might be handy for someone to check the arp table in perl, this would be convenient. Which is not what this was intended for so.le sigh.

The intention of this script was to check for the mac address of a remote machine, however after a little experimentation I realized the function was only checking the arp table.

Perl ping mac address