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How to Detect P2P (peer-to-peer) File Sharing, To…
Peer-to-Peer file sharing traffic has become a very large problem for many organizations as users engage in illegal (most times) file sharing processes that not only consumes valuable bandwidth, but…
Cisco VPN Client & Windows 8 (32bit & 64bit) - Re…
The Cisco VPN client is one of the most popular Cisco tools used by administrators, engineers and end-users to connect to their remote networks and access resources. This article shows how to fix the…
How and Why You Should Verify IOS Images On Cisco…
Chances are we’ve all needed to upgrade our Cisco’s device IOS software at some point. While upgrading the IOS software on a Cisco device is considered to be a fairly simple process, it can turn out…
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 firmware to the latest available version.
When initia…
Spanning Tree Protocol – Part 3: Bridge ID, Prior…
In this article we will examine the Spanning Tree Bridge ID structure, explain why it has increments of 4096, how VLAN information is embedded (for Per-VLAN Spanning Tree & multiple STP instances…
How to Register Cisco IP Phones & Connect CallMan…
This article shows how to connect Cisco's Unified CallManager with a CallManager Express system (including UC520, UC540 and UC560) via H323 gateway, allowing the two systems to route calls between ea…
Palo Alto Firewall Application-based Policy Enfor…
Our previous article examined the benefits of Palo Alto Networks Firewall Single Pass Parallel Processing (SP3) architecture and how its combine with the separate Data and Control planes to boost fir…
IP Protocol - Part 3: IP Classes, Network & Host…
This article explains the 'Network-ID' and 'Host-ID' concept found in IP addressing and subnetting. We analyse the structure of IP addresses and network classes and show their Network-IDs and Host-ID…
How to Fix VMware ESXi Virtual Machine 'Invalid S…
In this article, we'll show you how to deal with VMs which are reported to have an Invalid Status as shown in the screenshot below. This is a common problem many VMware and System Administr…
Understanding Cisco Dynamic Multipoint VPN - DMVP…
Dynamic Multipoint VPN (DMVPN) is Cisco’s answer to the increasing demands of enterprise companies to be able to connect branch offices with head offices and between each other while keeping costs lo…
Spanning Tree BPDU Guard and Errdisable Interface…
Running Spanning Tree Protocol (STP) in a large network environment can be a challenging task especially when features/enhancements such as BPDU Filter and BPDU Guard need to be configured to help ST…
WEB SSL VPN - The Next Wave Of Secure VPN Services
Fifteen years ago Virtual Private Networks (VPN) access was a fairly new concept to most businesses. While large corporations already had a good head-start with VPN technologies, the rest were starti…
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