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Critical 15 Year-old Linux Security Hole (Ghost)…
Security researchers at qualys.com yesterday released information on a critical 15 year-old Linux security hole which affects millions of Linux systems dated back to the year 2000. The newly pu…
Windows 2012 Server NIC Teaming – Load Balancing/…
NIC Teaming, also known as Windows Load Balancing or Failover (LBFO), is an extremely useful feature supported by Windows Server 2012 that allows the aggregation of multiple network interface cards t…
How To Stop CallManager (CUCM) 7, 8, 9, 10.5 with…
Cisco Unified CallManager (CUCM) and its Voice Gateway relies on the telecommunication provider (telco) to send the correct call details for every incoming call, to allow the system to correctly proc…
Propagation Delay
You may know that the minimum frame size in an Ethernet network is 64 bytes or 512 bits, including the 32 bit CRC. You may also know that the maximum length of an Ethernet cable segment is 500 meters…
Everything You Need to Know About SQL Injection A…
SQL Injection Attacks are one of the most popular attacks against web servers, websites and web applications. A fairly popular website can expect to receive anywhere between 80 and 250 SQL injection…
What is OWASP? Open Web Application Security Pro…
With nearly every business sector relying on the internet and digital tools to function, it is no surprise that cybersecurity is the second-fastest growing industry. Hackers don’t care how large or s…
Linux BIND DNS - Part 2: Configuring db.domain Z…
It's time to start creating our zone files. We'll follow the standard format, which is given in the DNS RFCs, in order to keep everything neat and less confusing.
First step is to decide on the doma…
NEXUS NX-OS: Useful Commands, CLI Scripting, Hint…
Whether you’re new to Cisco Nexus switches or have been working with them for years this article will show how to get around the Nexus NX-OS using smart CLI commands and parameters, create your…
Resolving Cisco Switch & Router ‘DHCP Server Pool…
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. Everything usually works without a problem, howev…
The OSI Model: Layer 6 - Presentation Layer
The Presentation Layer gets its name from its purpose: It presents data to the Application layer. It's basically a translator and provides coding and conversion functions. A successful data transfer…
IPv6 Subnetting - How and Why to Subnet IPv6
In the previous tutorials, I went through the need for IPv6, and followed it up by drawing out the salient features which overcomes issues with IPv4. We took the journey of looking inside the headers…
Anonymous Browsing – Internet Privacy. Securing Y…
Despite what some think, the internet is not private. Anonymous browsing and Internet Privacy are almost non-existent in today's online world. Websites collect personal information on every visit wit…
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