DHCP Snooping: More Security for Your Network
The Dynamic Host Configuration Protocol (DHCP) makes configuring networks easier. Today, instead of individually setting up every client, every PC, every smartphone and every network-compatible device, we mostly use DHCP.
Individual network users receive their IP addresses, subnet masks and other information via a server. This not only simplifies working with large networks, it also minimizes sources of error. Because the address assignment process is dynamic, it isn’t possible for two devices to be assigned the same IP address. It also reduces the required address space. If the device leaves the network, the IP address can automatically be reapproved for a new network user.
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At the same time, however, this simplification creates a gateway for criminals. When you rely on someone else to do the work for you, you hand over some of your control. As a result, things can be happening in the background that you never find out about. This can also happen with DHCP, however, there is a solution: The fraudulent use of DHCP can be countered with so-called “DHCP snooping”. How does this security technology work?
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