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Cisco Routers
Enabling & Configuring SSH on Cisco Routers. Rest…
This article shows how to configure and setup SSH for remote management of Cisco IOS Routers. We’ll show you how to check if SSH is supported by your…
Cisco Routers
Configuring PPTP (VPDN) Server On A Cisco Router
The Point to Point Tunneling Protocol (PPTP) is a network protocol used to create VPN tunnels between public networks. These VPN tunnels are encrypte…
Cisco CallManager-CCME
Free Cisco IP Phone & ATA Firmware (SCCP & SIP)…
Firewall.cx readers can now download free Cisco firmware files for all Cisco IP Phones & Cisco ATA devices. Our new Cisco IP Phone & ATA Firm…
Cisco CallManager-CCME
IP Phone 7900 Series (7940, 7941, 7942, 7960, 796…
This article explains how to reset your Cisco 7940, 7941, 7942, 7960, 7961, 7962 & 7920 IP phone to factory defaults, and how to upgrade its firm…
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Data Center Articles:
Join Australia’s First Official Cisco Data Center…
It’s a reality – Australia now has its own Official Cisco Data Center User Group (DCUG) and it’s growing fast! Originally inspired by Cisco Champions…
Nexus 7000/7700 Software Upgrade via ISSU. Comple…
This article shows how to perform an ISSU (In-Service Software Upgrade) on a Nexus Data Center switch (7000 and 7700 models) and avoid service and ne…
Complete Guide to Nexus Checkpoint & Rollback Fea…
The Cisco NX-OS checkpoint feature provides the capability to capture at any time a snapshot (backup) of the Cisco Nexus configuration…
Introduction to Cisco Nexus Switches – Nexus Prod…
This article introduces the Cisco Nexus product family (Nexus 9000, Nexus 7000, Nexus 5000, Nexus 3000, Nexus 2000, Nexus 1000V and MDS 9000). We exp…
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Cisco Switches
Resolving Cisco Switch & Router ‘DHCP Server Pool Exha…
In previous articles, we showed how it is possible to configure a Cisco router or Catalyst switch to provide DHCP server services to network clients. Ever…
Cisco Switches
VLAN Security Tips - Best Practices
This article focuses on VLAN Security and its implementation within the business network environment. We provide tips and Cisco CLI commands that will hel…
Cisco Switches
Password Recovery / Password Reset Procedure for Catal…
This article shows how to reset a password on a Cisco Catalyst 3750-X (stacked or single unit) and Cisco Catalyst 3560-x switch without losing its startup…
Cisco Switches
DHCP Option 82 Message Format, Analysis. DHCP Snooping…
This article provides in-depth analysis of DHCP Option 82 (DHCP Relay Agent) which is one of the +180 DHCP Options available to the DHCP protocol and used…
Cisco Firewalls
Demystifying Cisco AnyConnect 4.x Licensing. Plus, Plu…
In late 2014, Cisco announced the new licensing model for the latest AnyConnect Secure Mobility client v4.x. With this new version, Cisco introduced a num…
Cisco Firewalls
Upgrading - Uploading AnyConnect Secure Mobility Clien…
This article will show how to download and upload the newer AnyConnect 4.x VPN clients to your Cisco ASA Firewall appliance (5500 & 5500-X Series) and…
Cisco Firewalls
Understand & Configure NAT Reflection, NAT Loopback, H…
This article examines the concept of NAT Reflection, also known as NAT Loopback or Hairpinning, and shows how to configure a Cisco ASA Firewall running AS…
Cisco Firewalls
Cisco ASA 5500 Series Firewall Modules & Cards – Conte…
Cisco’s Adaptive Security Appliance (ASA) Firewalls are one of the most popular and proven security solutions in the industry. Since the introduction of t…
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SASE & SD-WAN Networks
The Most Common Worst Networking Practices and How To…
In the rush to keep pace with the many challenges facing today’s organizations, all too often networking teams end up adopting practices and processes tha…
SASE & SD-WAN Networks
SASE and VPNs: Reconsidering your Mobile Remote Access…
The Virtual Private Network (VPN) has become the go to security solution for keeping communications between networks and endpoints secure. After all, VPNs…
Virtualization & VM Backup
Ultimate Guide: Install Windows 11 on VMware ESXi – Ea…
In this article, we’ll show you how to setup or install Microsoft Windows 11 on VMware’s ESXi servers and bypass the Trusted Platform Module version 2.0 (…
Netflow
NetFlow Analyzer: Free Download, Step-by-Step Installa…
In our previous article we explained how a Netflow Analyzer can help you gain visibility into your user traffic, application traffic and data flows while…




