What is Cisco port security?
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?
You can configure the port for one of three violation modes: protect, restrict, or shutdown.
How do I set up port security?
To configure port security, three steps are required:
- define the interface as an access interface by using the switchport mode access interface subcommand.
- enable port security by using the switchport port-security interface subcommand.
How do I enable port security on my Cisco router?
Configuration Steps:
- Your switch interface must be L2 as “port security” is configure on an access interface.
- Then you need to enable port security by using the “switchport port-security” command.
- This step is optional, but you can specify how many MAC addresses the switch can have on one interface at a time.
What is a port security?
Port security in simple terms refers to the security and law enforcement measures employed to safeguard a shipping port from terrorism and other unlawful activities and activists. It also refers to the measures employed to see that the treaties entered into with other countries are also enforced appropriately.
What is Switchport security?
The switchport security feature offers the ability to configure a switchport so that traffic can be limited to only a specific configured MAC address or list of MAC addresses.
What is port security?
Port security is part of a broader definition concerning maritime security. It refers to the defense, law and treaty enforcement, and counterterrorism activities that fall within the port and maritime domain.
What are the port security features?
The port security feature offers the following benefits:
- You can limit the number of MAC addresses on a given port. 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.
How do I check if port security is enabled?
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 enable port security in routers?
You can enable port security on a per port basis.
Who is responsible for 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.
What is Switchport port security command?
How do I clear a Cisco port security violation?
You can clear the counter by going into configure terminal, the interface, and flipping port security off then on. this will clear the counters without having to do a restart.
How can you prevent an attacker from accessing the port?
Install a Firewall: A firewall can help prevent unauthorized access to your private network. It controls the ports that are exposed and their visibility. Firewalls can also detect a port scan in progress and shut them down.
What are the threats to port security?
Port Security Threats and Vulnerabilities
- Piracy. Modern-day piracy is a real and dangerous threat to vessels and ports, especially since most attacks take place while ships are still docked at port.
- Armed robbery.
- Terrorism.
- Drug smuggling and people trafficking.
- Cargo theft.
- Illegal fishing and Environmental damage.
Why would you enable port security on a switch?
The main reason to use port security in a switch is to stop or prevent unauthorized users to access the LAN.
What is the default port security setting on a switch port?
If you enable switch port security, the default behavior is to allow only 1 MAC address, shutdown the port in case of security violation and sticky address learning is disabled. Next, we will enable dynamic port security on a switch.
Why do we need port security?
Port Security helps secure the network by preventing unknown devices from forwarding packets. When a link goes down, all dynamically locked addresses are freed. The port security feature offers the following benefits: You can limit the number of MAC addresses on a given port.
What causes port security violation?
A security violation occurs when the maximum number of MAC addresses has been reached and a new device, whose MAC address is not in the address table attempts to connect to the interface or when a learned MAC address on an interface is seen on another secure interface in the same VLAN.
How do I know if a port is secure?
you can use “Keystore Explorer” tool and select Examine> ExamineSSL, and put in your host and port and click OK, if this port on that server is encrypted then it will show the certificate details that the port is using to encrypt data.
What ports should be closed for security?
Here are some common vulnerable ports you need to know.
- FTP (20, 21) FTP stands for File Transfer Protocol.
- SSH (22) SSH stands for Secure Shell.
- SMB (139, 137, 445) SMB stands for Server Message Block.
- DNS (53) DNS stands for Domain Name System.
- HTTP / HTTPS (443, 80, 8080, 8443)
- Telnet (23)
- SMTP (25)
- TFTP (69)
How do you manage port security?
Manage Port Security
- Plan your port security configuration and monitoring.
- On the Port Security window, select the port(s) to configure.
- Click Set Security Policy for the Selected Ports.
- Set Learn Mode to Static so the port will detect unauthorized devices.
- Learned addresses that become authorized do not age-out.
How do I test a port security violation on a Cisco switch?
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.
Is SSL always on port 443?
SSL/TLS does not itself use any port — HTTPS uses port 443. That might sound kind of snooty, but there’s an important distinction to be made there. Think of SSL/TLS as more of a facilitator. It enables other protocols, like HTTPS or DNS over TLS.
How many USB ports are available on the Cisco 2900 Series routers?
● Two external Compact Flash slots are available on the Cisco 2900 Series Integrated Services Routers. Each slot can support high-speed storage densities upgradeable to 4 GB in density. ● Two high-speed USB 2.0 ports are supported. The USB ports enable secure token capabilities and storage.
What are the features of the Cisco 2900 Series ISRS?
● The Cisco 2900 Series ISRs are highly modular platforms with several types of module slots to add connectivity and services for varied branch-office network requirements.
What are the key features of the 2900 Series?
● The Cisco 2900 Series are powered by high-performance multi-core processors that can support the growing demands of high-speed WAN connections to the branch-office while also running multiple concurrent services.
How do I configure port security on the 200/300 series managed switches?
This article explains how to configure port security on the 200/300 Series Managed Switches. SF/SG 200 and SF/SG 300 Series Managed Switches Step 1. Log in to the web configuration utility and choose Security > Port Security. The Port Security page opens: Step 2. From the Interface Type Equals drop down list, choose Port or LAG and Click Go.