In this article, we are discussing how to edit a named access control list on the router. Access control lists are a group of conditions that are wrapped together by a particular name or number. The conditions used in this group are the number. And these conditions are used to avoid traffic on routes. Through these conditions, we can avoid or filter traffic. ACL is a combined feature of IOS software which helps to reduce traffic jams in IOS devices.in network traffic moves like packets and each packet contains a small piece of data. To know more about how to Modify/Edit Named Access Control List on Router
Standard ACL is one type of oldest control list among the access control list. Standard ACL can control traffic by managing the data’s belongs to them. By using the “access-list” IOS command standard access list can be created.
In an extended control list, they can differentiate the IP traffic, unlike the Standard ACL. In Extended ACL they use both source and destination address and the port number to differentiate the IP traffic. Here we can define which IP address needs to be allowed or get denied and the range is from 100-199 and 2000-2699. Extended control list filter packets which are near to source address.
In named ACL all the lists are identified using number or name. It is user-friendly to use named ACL rather than numbered ACL because it is easier to recognize with name and can associate a task. To access the control list we can add or reorder the statements. The ACL contains the following features that are not supported by the number of access lists. Named ACL is one of the ACL in which the traffics are get filtered based on the names or numbers. Some of the features of Access Control Lists are not get supported by the Named ACL.
VIEW AN EXISTING NAMED ACCESS CONTROL LIST
By using show ip access-list we can view the named ACLs. The statement used is:
TO ADD NEW NAMED ACCESS CONTROL LIST TO EXISTING ONE
The command describes the way to add new ACL to the list.
TO DELETE AN EXISTING FROM THE NAMED ACCESS CONTROL LIST
The statement given below explains the way to delete the ACL.
TO RE-ADJUST NAMED ACCESS CONTROL LISTS SEQUENCE NUMBER
We can automatically change or adjust the access control list by using the “resequence” keyword. Below describes the statement:
- Extended Access Control List (ACL) Operators
- Extended Access Control List, TCP and UDP Port Numbers and Names
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