Cisco Switch (Cayalyst 2960-X): How to add a rule to the access list that filters out l2tp p...



As an IT administrator, it is common to use access lists to filter incoming and outgoing data traffic on a Cisco Catalyst 2960-X switch. Access lists are a set of rules that are used to control the flow of traffic on a network. They are commonly used to filter out malicious traffic, such as viruses or hacking attempts, or to limit the types of traffic that can be transmitted on a network. In this article, we will discuss how to add a rule to an access list on a Cisco Catalyst 2960-X switch.

The first step in adding a rule to an access list is to determine what type of traffic needs to be filtered. For example, if you want to block all traffic from a specific IP address, you would create an access list rule that blocks all traffic from that IP. If you want to limit the types of traffic that can be sent and received on the network, you would create an access list rule that limits the types of traffic that can be sent and received.

Once you have determined the type of traffic that needs to be filtered, the next step is to create the rule. This is done using the “access-list” command, followed by the name of the access list, the action to be taken (accept or deny), the protocol (TCP or UDP), the source IP address, and the destination IP address. For example, if you wanted to block all traffic from a specific IP address, the command would look like this:

access-list my_access_list deny ip any host

Once the command is entered, the rule is added to the access list. The rule will then be applied to all traffic flowing through the switch. It is important to note that the order in which access list rules are applied is important. For example, if you wanted to block all traffic from a specific IP address, the rule should be placed before any other rules that allow traffic from that IP address.

In addition to creating access list rules, it is also important to monitor the traffic that is being filtered. This can be done with the “show access-list” command. This command will display all of the rules that are currently applied to the access list, as well as the number of packets that have been filtered by each rule. This information can be used to ensure that the access list is functioning properly and to identify any potential security issues.

In summary, access lists are an important tool for controlling the flow of data on a network. They can be used to filter out malicious traffic, limit the types of traffic that can be transmitted, and monitor the traffic that is being filtered. To add a rule to an access list on a Cisco Catalyst 2960-X switch, use the “access-list” command, followed by the name of the access list, the action to be taken (accept or deny), the protocol (TCP or UDP), the source IP address, and the destination IP address. Additionally, the “show access-list” command can be used to monitor the traffic that is being filtered. By following these steps, IT administrators can ensure that their networks are secure and that only authorized traffic is being transmitted.

Inquire Now

Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.
Find your next full or part-time role here

ScaleDesk can either help you find your next full time gig or a part time side gig where you can create extra income!

Onboard with us once
Skip HR screening and go to the final interview with with only your resume and a video interview you never have to redo
Get paid electronically every month for the hours you work
We will be your reference even if you work for us once

IT Teams: Use ScaleDesk to augment your team

Schedule Demo