Port Security helps secure the network by preventing unknown devices from forwarding packets. … Packets that have a matching MAC address (secure packets) are forwarded; all other packets (unsecure packets) are restricted. You can enable port security on a per port basis.
What does Cisco port security do?
Port security is a layer two traffic control feature on Cisco Catalyst switches. It enables an administrator configure individual switch ports to allow only a specified number of source MAC addresses ingressing the port.
What are the three types of port security?
On Cisco equipment there are three different main violation types: shutdown, protect, and restrict.
What do you understand by the term port security?
Port security refers to the defense, law and treaty enforcement, and counterterrorism activities that fall within the port and maritime domain. It includes the protection of the seaports themselves, the protection and inspection of the cargo moving through the ports, and maritime security.
How does port security identify a device?
Port security uses the MAC address to identify allowed and denied devices. By default, port security allows only a single device to connect through a switch port. You can, however, modify the maximum number of allowed devices.
What are the port security violations?
A security violation occurs if the maximum number of secure MAC addresses have been added to the address table and the port receives traffic from a MAC address that is not in the address table. You can configure the port for one of three violation modes: protect, restrict, or shutdown.
How do you show port security violations?
Here is a useful command to check your port security configuration. Use show port-security interface to see the port security details per interface. You can see the violation mode is shutdown and that the last violation was caused by MAC address 0090.
Can we configure port security on trunk ports?
Port security supports trunks. –On a trunk, you can configure the maximum number of secure MAC addresses both on the trunk and for all the VLANs on the trunk. –You can configure the maximum number of secure MAC addresses on a single VLAN or a range of VLANs.
How do I enable port security?
You can make your L3 switch port to an access interface by using the “switchport” command. 2) Then you need to enable port security by using the “switchport port-security” command. This can also be applied in a range of the interfaces on a switch or individual interfaces.
Which device would you use to configure port security?
What can you do? Configure port security on the switch. You’ve just enabled port security on an interface of a Catalyst 2950 switch. You want to generate an SNMP trap whenever a violation occurs.
How are ports protected?
The protected ports feature is a safety measure that prevents ports from forwarding traffic to each other, even if they are on the same VLAN. Each port is designated as either protected or unprotected. By default, all ports are unprotected.
Who is in charge of port security?
Two agencies under the U.S. Department of Homeland Security (DHS) are primarily responsible for port security: the U.S. Coast Guard for offshore and waterside security, and the U.S. Bureau of Customs and Border Protection (CBP) for landside security.
Which attacks can be avoided by port security features?
Port Security feature can protect the switch from MAC flooding attacks. Port security feature can also protect the switch from DHCP starvation attacks, where a client start flooding the network with very large number of DHCP requests, each using a different source MAC address.
What is switch port security and violations?
Switch port security limits the number of valid MAC addresses allowed on a port. … If the maximum number of secure MAC addresses has been reached, a security violation occurs when a devices with a different MAC addresses tries to attach to that port.