What is a DHCP starvation attack How do you mitigate from DHCP starvation attacks on a local area network segment?

DHCP starvation attacks are easy to pull off. To help mitigate this type of attack, there’s an approach called port security. Advanced cybersecurity training can also help you prevent DHCP starvation attacks.

What are the two attacks related to DHCP server?

Two types of DHCP attacks can be performed against a switched network: DHCP starvation attacks and DHCP spoofing. In DHCP starvation attacks, an attacker floods the DHCP server with DHCP requests to use up all the available IP addresses that the DHCP server can issue.

What is a DHCP starvation attack and what does it do?

DHCP starvation attack is an attack that targets DHCP servers whereby forged DHCP requests are crafted by an attacker with the intent of exhausting all available IP addresses that can be allocated by the DHCP server. Under this attack, legitimate network users can be denied service.

What is the result of a DHCP starvation?

Legitimate clients are unable to lease IP addresses. Clients receive IP address assignments from a rogue DHCP server. The attacker provides incorrect DNS and default gateway information to clients.

What program can be used to stop unauthorized use of DHCP servers?

Explanation: DHCP snooping is a security feature that is used in OS of a network in the layer 2. This technology prevents unauthorized DHCP servers offering IP addresses to DHCP clients.

What are the goals of DHCP starvation attacks and DHCP spoofing attacks and how can these attacks be mitigated?

DHCP starvation attacks require an attack tool such as Gobbler. Recall that DHCP starvation attacks can be effectively mitigated by using port security because Gobbler uses a unique source MAC address for each DHCP request sent. However, mitigating DHCP spoofing attacks requires more protection.

What is a DHCP server and how does it work?

What is a DHCP Server? A DHCP Server is a network server that automatically provides and assigns IP addresses, default gateways and other network parameters to client devices. It relies on the standard protocol known as Dynamic Host Configuration Protocol or DHCP to respond to broadcast queries by clients.

Which command configures an Ethernet interface as a DHCP client?

Explanation: The ip address dhcp interface configuration command configures an Ethernet interface as a DHCP client. The service dhcp global configuration command enables the DHCPv4 server process on the router.

What information does the DHCPDISCOVER message contain?

The DHCPDISCOVER message contains the IP address and subnet mask to be assigned, the IP address of the DNS server, and the IP address of the default gateway. Explanation: The client broadcasts a DHCPDISCOVER message to identify any available DHCP servers on the network. A DHCP server replies with a DHCPOFFER message.

Do routers/switches still use DHCP for IPv4?

There are many enterprise companies who are still using DHCP for IPv4 on their routers/switches. This is typically done by the network administrator who needs to get a DHCP capability up and running quickly but does not have access to a DHCP server. Most routers/switches have the ability to provide the following DHCP server support: