5 Awesome Things You Can Learn From Sniffing Technique: DHCP Attacks
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How DHCP Works Dynamic Host Configuration Protocol (DHCP) is a client/server protocol that gives an IP address to an IP host. additionally to the IP address, the DHCP server also provides configuration-related information like the default gateway and subnet mask.
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DHCPÂ Request/Reply Message A device that already has an IP address can use the simple request/reply exchange to get other configuration parameters from a DHCP server. When the DHCP client receives a DHCP offer, the client immediately responds by sending back a DHCP request packet.
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DHCP Starvation Attack In a DHCP starvation attack, an attacker floods the DHCP server by sending a large number of DHCP requests and uses all of the available IP addresses that the DHCP server can issue. As a result, the server cannot issue any longer IP addresses, resulting in Denial-of-Service (DoS) attacks.
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Rogue DHCP Server Attack In addition to DHCP starvation attacks, an attacker can perform MITM attacks such as sniffing, An attacker who succeeds in exhausting the DHCP Server's IP address space can found out a Rogue DHCP Server on the network which isn't under the control of the network administrator.
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