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WAN Design for Multiple Office Connectivity
Businesses with multiple branch office locations often suffer connecting and sharing network resources over the WAN. They tend to think that the WAN technologies are very expensive and more for large...
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What is IPSec VPN PFS Perfect Forward Secrecy
When configuring a IPSec VPN tunnel, it is recommended to enable PFS, or Perfect Forward Secrecy if both side of the VPN devices support the technology. It provides a more secure VPN tunnel. What is...
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How to Upgrade SourceFire FirePOWER FireSIGHT Management Center
This information in this article applies to SourceFire 3D appliances, Cisco FirePOWER products and the next generation firewall product family, ASA 5508-X, 5516-X and 5585-X with FirePOWER service...
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How to Backup and Restore FirePOWER Management Center
We’ll walk you through step by step how to backup and restore FirePOWER Management Center, formally called SourceFire FireSIGHT Defense Center. If you can access the Web UI of the Management Center, it...
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Database Integrity Check Failed on FirePOWER
I have run into the “Database Integrity Check Failed on FirePOWER” issue on the Management Center when I was trying to back up or upgrading the Management Center to a newer version. The fact is that...
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What is Cisco ACI Fabric
What is Cisco ACI fabric forwarding? The Cisco Application Centric Infrastructure (ACI) allows applications to define the network infrastructure. It is one of the most important aspects in Software...
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Converting Cisco Wireless Access Point from Lightweight Mode to Autonomous...
Whether a Cisco wireless access point (AP) was pulled from production or purchased new, it comes in one of the two operating mode: Lightweight or Autonomous Mode. When you are deploying the AP on your...
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Cisco FirePOWER High Disk Space Utilization
Taking advantage of Cisco’s zero day protection, Cisco FirePOWER checks and downloads the latest signature files from the cloud throughout the day. Once the Cisco FirePOWER system has been configured...
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Small Branch Home Office Wireless Design
Wireless network technology keeps evolving. With the latest 802.11ac Wave 2, Gigabit wireless across your network isn’t something out of reach. It is not a new concept but it has become real since the...
View ArticlePPTP vs L2TP/IPSec vs SSTP vs IKEv2 vs OpenVPN
When implementing remote access VPN, people often get confused by the protocols and types of VPN available and which one they should pick. What are the differences between PPTP vs L2TP/IPSec vs SSTP vs...
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Configuring L2TP over IPSec VPN on Cisco ASA
When it comes to implementing remote access VPN, there are many options. Check out my article on deciding among PPTP vs L2TP/IPSec vs SSTP vs IKEv2 vs OpenVPN. In that article, I listed a few things to...
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Cisco VIRL Installation on VMware Fusion Pro for Mac OS
The Pro version of VMware Fusion has more features and greater flexibilities compared to the standard version. When working with VIRL, the Pro version provides a GUI interface for creating virtual...
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Install Cisco VIRL on VMware Workstation Pro and Player
You can run the Cisco VIRL lab on a workstation or laptop. There are two options – installing VIRL as a native OS, or installing VIRL as a virtual machine running on top of your existing OS. In this...
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Cisco VIRL Installation Troubleshooting Common Issues
A collection of Cisco VIRL Installation Troubleshooting Common Issues. More will be added over time. Cisco VIRL Installation Troubleshooting Common Issues KVM-ok Check Failed When deploying VIRL as a...
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Cisco VIRL Book Update
Over the last 10 months, I’ve been working on a book titled “The VIRL Book”. It is a step-by-step guide on how to use Cisco VIRL (Virtual Internet Routing Lab) and help Cisco certification students and...
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Book Review – How to Build Your Own NetApp Lab
NetApp is a company makes storage applications based on commodity hardware and proprietary software that aims making managing vast amount of storage easy. The entire storage system is optimized from...
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Why Cisco VIRL is Better Than GNS3
In the recent years, virtualization technology has advanced to the point that nearly everything can be virtualized. Started from server and storage virtualizations, to Software Defined Networking...
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Network Visualization OSPF, EIGRP, BGP, VRF And More
Have you thought about seeing or visualizing OSPF, EIGRP, BGP, VRF and more on your network with a simple, color-coded view on your computer screen? Recently I shared with you a network visualization...
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Why SASE is the Future of Network and Security Architecture
SASE stands for Secure Access Service Edge. It is an emerging network architecture combining comprehensive WAN capabilities with comprehensive network security functions such as SD-WAN, SWG, CASB,...
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Small Branch Home Office Wireless Design
Wireless network technology keeps evolving. With the latest 802.11ac Wave 2, Gigabit wireless across your network isn’t something out of reach. It is not a new concept but it has become real since the...
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