ACL

UDP and TCP Port Number Usage in ACL’s in Cisco IOS

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 […]

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Access Control to Infrastructure (iACL) and Transit (tACL)

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 »

Create ACL and Firewall Rules with Wireshark

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 »

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