ISC DHCPD
Clients that rely on a DHCP server for information typically get their IP address, subnet, default route and DNS information as a minimum, as well as netbios node type and other Windows-related network information, meaning that an attacker can do a lot of damage. First I'll discuss securing the DHCP server and possible attacks against it, then the DHCP clients and attacks you can execute against them. An important distinction in this article: dhcpd is the DHCP server, and dhcpcd is the client-side daemon. They are quite different and easily confused if you aren't paying attention.
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