Which command can be used to prevent MAC spoofing on a Cisco switch in the network?

Which command can be used to prevent MAC spoofing on a Cisco switch in the network?

Use the port-security command described in the “Mitigating CAM Table Overflow Attacks” section to specify MAC addresses connected to particular ports. DHCP snooping could be used as a method to mitigate MAC address spoofing.

What can MAC address spoofing be used for?

Motivation. Changing the assigned MAC address may allow the user to bypass access control lists on servers or routers, either hiding a computer on a network or allowing it to impersonate another network device. MAC spoofing is done for legitimate and illicit purposes alike.

Does MAC filtering prevent spoofing?

Packet filtering can help you to prevent IP address spoofing attacks because they block packets with incorrect source address information.

How does MAC Authentication Bypass work?

à MAB is used to authenticate non-802.1x capable devices (ex: printers, IP phones). à MAB is not a secure authentication method compared to other authentication methods because anyone can spoof mac address. i) The switch takes each new mac address and sends it to Radius Server (ISE) for authentication.

Which layer 2 solution that prevents DHCP starvation and DHCP spoofing attacks?

DHCP Snooping is a layer 2 security technology incorporated into the operating system of a capable network switch that drops DHCP traffic determined to be unacceptable. DHCP Snooping prevents unauthorized (rogue) DHCP servers offering IP addresses to DHCP clients.

Why would an attacker want to spoof a MAC address Cisco?

Attackers spoof their MAC address to perform a man-in-the-middle (MiTM) attack. In one common attack, the attacker pretends to be the default gateway and sends out a gratuitous Address Resolution Protocol (ARP) to the network so that users send their traffic through the attacker rather than the default gateway.

Why would an attacker want to spoof a MAC address?

This legitimate use of MAC spoofing is in opposition to the illegal activities, where users change MAC addresses to circumvent access restrictions and security measures or imitate the identity of another network device.

Can a MAC address be spoofed?

Mac spoofing is computer identity theft, for good or for bad reasons, and it is relatively easy. MAC spoofing refers to altering the MAC address on a NIC (network interface controller) card. The MAC address is “burned in” at the factory. Therefore each network card is shipped from the factory with a unique MAC address.

What Wired MAB?

MAB stands for MAC Address Bypass and is another way a network device, such as a switch, can “authenticate” (though it’s not really authentication) a device to a NAC solution.

What is a MAB rule?

Monthly average balance rule: Banks charge a penalty from the customers failing to maintain the required MAB in their savings accounts. MAB is an average of the end-of-day (EoD) closing balances in a month. The MAB requirements depend on the location of a customer’s account in urban, metro, semi-urban and rural areas.

What is MacMac authentication bypass (Mab)?

MAC Authentication Bypass (MAB) is a convenient, well-understood method for authenticating end users. This document describes MAB network design considerations, outlines a framework for implementation, and provides step-by-step procedures for configuration. This document includes the following sections:

What happens before and after Mab authentication?

Before MAB authentication, the identity of the endpoint is unknown and all traffic is blocked. The switch examines a single packet to learn and authenticate the source MAC address. After MAB succeeds, the identity of the endpoint is known and all traffic from that endpoint is allowed.

How to identify Mab requests on a Cisco switch?

Cisco switches uniquely identify MAB requests by setting Attribute 6 (Service-Type) to 10 (Call-Check) in a MAB Access-Request message. Therefore, you can use Attribute 6 to filter MAB requests at the RADIUS server.

What happens if Rouge device spoofs it’s MAC address?

Now a rouge device spoofed it’s MAC address but does not advertise the TLV value connects to the switch, the switch will send a RADIUS request again to ISE, ISE will re-profile the endpoint, checked the TLV value is changed and block the switch port to this rouge endpoint? 02-19-2019 11:32 PM 02-19-2019 11:32 PM