Configuring named ACLs

Just like the numbered ACLs we’ve used so far, named ACLs allow you to filter network traffic according to various criteria. However, they have the following benefits over numbered ACLs: an ALC can be assigned a meaningful name (e.g. filter_traffic_to_server) Read More …

Configuring extended ACLs

To be more precise when matching a certain network traffic, extended access lists are used. Extended access lists are more difficult to configure and require more processor time than the standard access lists, but they enable a much more granular Read More …

Configuring standard ACLs

To create an standard access list on a Cisco router, the following command is used from the router’s global configuration mode: R1(config)# access-list ACL_NUMBER permit|deny IP_ADDRESS WILDCARD_MASK NOTE ACL number for the standard ACLs has to be between 1–99 and Read More …

Types of ACLs

There are two types of access lists: 1. standard access lists – with standard access lists, you can filter only on the source IP address of a packet. These types of access list are not as powerful as extended access Read More …

What are ACLs?

ACLs are a set of rules used most commonly to filter network traffic. They are used on network devices with packet filtering capatibilites (e.g. routers or firewalls). ACLs are applied on the interface basis to packets leaving or entering an Read More …