Articles That Might Interest:

Supernetting & CIDR

What is Supernetting (Route Summarization) & How…

Supernetting is the opposite of of subnetting, and is also known as route aggregation or CIDR (Classless Inter-Domain Routing). Supernetting is a technique that allows multiple smaller network blocks…

Cisco Routers

Troubleshooting PPP Internet Connection On A Cisc…

The Point-to-Point Protocol is one of the most popular protocols around used by engineers, ISPs and companies around the globe for authentication of remote users & router equipment. The most com…

SASE & SD-WAN Networks

How To Secure Your SD-WAN. Comparing DIY, Managed…

With so much enterprise network traffic now destined for the cloud, backhauling traffic across an expensive MPLS connection to a data center to apply security policy no longer makes sense. Software-d…

Palo Alto Networks

Complete Guide to Upgrading Palo Alto Firewall PA…

Upgrading your Palo Alto Firewall or Panorama Management System to the preferred PAN-OS release is always recommended as it ensures it remains stable, safe from known vulnerabilities and exploits but…

Cisco CallManager-CCME

Cisco Small Business SPA500 IP Phone Series Admin…

Firewall.cx readers can now access and freely download the Cisco Small Business Administration Guide for Cisco SPA500 series IP phones. The Administration Guide for Cisco SPA500 series IP phon…

Cisco Routers

How To Configure Dynamic DNS Server On A Cisco Ro…

Hosting your own webserver or email server would normaly require a static IP address from your ISP. This ensures that your services are always reachable using the same IP address or domain name. If…

Network Address Translation - NAT

Network Address Translation (NAT) Overload - Part…

NAT Overload is the most common NAT method used throughout all networks that connect to the Internet. This is because of the way it functions and the limitations it can overcome, and we'll explore al…

Cisco Services & Technologies

Comparing DMVPN Single Tier and Dual Tier Headend…

This article extends our DMVPN article series by answering common questions regarding the differences between Single Tier Headend and Dual Tier Headend architectures. When hearing the DMVPN terms si…

SASE & SD-WAN Networks

The Need for a Converged SASE Platform. Convergin…

The digital transformation is pushing applications to the cloud, the 2020-2022 pandemic shifted employees to work from home, and the number of resulting new use cases is sending IT leaders scrambling…

Network Fundamentals

Media Access Control - MAC Addresses

A MAC address, or Media Access Control address, is a unique identifier assigned to a network interface controller (NIC) for use as a network address in communications within a network segment. It i…

Routing

OSPF - Part 4: OSPF Neighbor States – OSPF Neighb…

This is the third article of our OSPF series which analyzes the different OSPF States routers go through during the OSPF discovery and neighbor forming process. We analyze OSPF states (Init state, 2-…

Linux - Unix

Linux CentOS - Redhat EL Installation on HP Smart…

This article was written thanks to our recent encounter of a HP DL120 G7 rack mount server equipped with a HP Smart Array B110i SATA Raid controller, needed to be installed with the Linux CentOS 6.0…