As most of us know, a key to managing the Internet is knowledge of TCP and UDP port numbers. Cisco IOS uses Access Control Lists for many purposes, but in this tip, we will focus on TCP and UDP port numbers. Port numbers are unique, well-known, registered or ephemeral numbers used by TCP (Transmission Control […]
UDP and TCP Port Number Usage in ACL’s in Cisco IOS Read More »
ACL’s’ are vital to networking today. Everyone uses them, and proper usage is imperative. Besides being difficult to use at times, the penalty for an ACL mistake is huge. In one swift swoop, you could incorrectly permit malicious attackers onto your network or incorrectly deny all valid users from your network. Either way, the consequences
Access Control List (ACL) Basics Read More »
As we said in our basic ACL How To, ACL’s’ are vital to networking today. Everyone uses them, and proper usage is imperative. In this How To, we are going a little deeper into two ACL types: Intrastructure and Transit. We will discuss the two with examples and you will clearly understand the difference between
Access Control to Infrastructure (iACL) and Transit (tACL) Read More »
Check out these great references as well: Our custom profiles repository for Wireshark Our Udemy course on Wireshark Our Udemy course on Wireless Packet capture Network Administrators often need to deploy new Access Control Lists or Firewall rules based on items they see and learn in packet captures. Wireshark makes this task very
Create ACL and Firewall Rules with Wireshark Read More »
