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Linux - Unix
Linux File & Folder Permissions
File & folder security is a big part of any operating system and Linux is no exception!
These permissions allow you to choose exactly who can access your files and folders, providing an overall…
Cisco Routers
Configuring Cisco SSL VPN AnyConnect (WebVPN) on…
Our Web SSL VPN article written back in 2011 introduced this new wave of VPN services. This article extends the topic by covering the installation and configuration of Cisco’s SSL AnyConnect VP…
Linux - Unix
Linux BIND DNS - Part 6: Linux BIND - DNS Caching
In the previous articles, we spoke about the Internet Domain Hierarchy and explained how the ROOT servers are the DNS servers, which contain all the information about authoritative DNS servers the do…
Cisco CallManager-CCME
IP Phone 7945, 7965, 7975 Factory Reset Procedure…
This article explains how to reset your Cisco 7945, 7965 and 7975 IP phone to factory defaults, and how to upgrade the firmware to the latest available version. We also provide necessary information…
Cisco CallManager-CCME
Cisco Unity Express Installation/Setup - Service…
Mentioned in Part-1 of our Cisco Unity Express installation article, the Cisco Unity Express setup procedure is identical for ISM-SRE-300-K9 and SM-SRE-700-K9 modules. We will be using the smaller IS…
Virtualization & VM Backup
5 Most Critical Microsoft M365 Vulnerabilities Re…
Microsoft 365 is an incredibly powerful software suite for businesses, but it is becoming increasingly targeted by people trying to steal your data. The good news is that there are plenty of ways adm…
Network Address Translation - NAT
Dynamic NAT - Part 1
Dynamic NAT is the second NAT mode we're going to talk about. Dynamic NAT, like Static NAT, is not that common in smaller networks but you'll find it used within larger corporations with complex netw…
ManageEngine Firewall Analyzer
Achieving Modern Compliance: Navigate PCI DSS v4…
In an era where cyber threats are growing in both volume and sophistication, failing to meet security compliance standards is no longer just a legal issue—it’s a business risk with potentially catast…
Network Protocol Analyzers
How to Detect Routing Loops and Physical Loops wi…
When working with medium to large scale networks, IT departments are often faced dealing with network loops and broadcast storms that are caused by user error, faulty network devices or incorrect con…
Network Protocols
Introduction To The ISDN Protocol
ISDN (Integrated Services Digital Network) is a digital telephone standard designed to replace analogue connections by utilising ordinary copper wires that are used in standard analogue telephone sys…
Linux - Unix
The Linux Command Line
You could actually skip this whole section for those who are already familiar with the topic, but we highly recommend you read it because this is the heart of Linux. We also advise you to go through…
Linux - Unix
How To Secure Your Linux Server or Workstation -…
Below are some of the most common recommendations and method to effectively secure a Linux Server or Workstation.
Boot Disk
One of the foremost requisites of a secure Linux server is the boot disk…
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