ACLs Made Simple: An Easy-to-Follow Guide
ACLs are used to filter network traffic by specifying which types of traffic are allowed or denied based on various criteria such as source and destination IP addresses, port numbers, protocol types, and other attributes. They can be used to permit or deny traffic between specific hosts or networks, restrict access to specific applications or services, and enforce security policies. So, lets take a deep dive to understand the ACLs. There are two main types of Access Control Lists (ACLs) used in networking: Standard ACLs : These ACLs allow or deny traffic based solely on the source IP address of the packet. They are numbered 1-99 and 1300-1999 in Cisco routers and switches. Extended ACLs : These ACLs allow or deny traffic based on multiple attributes such as source and destination IP addresses, port numbers, protocols, and others. They are numbered 100-199 and 2000-2699 in Cisco routers and switches. In addition to these two types, there are also Name...