Networking
Commonly used DNS records in a Business operation
Any business expecting to make an online presence requires a fair understanding of how DNS (known as Domain Name System) functions. DNS is a simplified directory full of records handling queries from users who try to reach a business (through an email, website or contact page). DNS ultimately reveals which part of the business services [...]
Fix startup image issue on HPE OfficeConnect switch
HP (also called Hewlett Packard), is an american company well known for it technology products such as servers, switches.. etc. HP offers variety of services for various business mediums and SMEs (small and medium business) tend to choose Office connect switches. They are value for money, cost effective and does its job. Most [...]
pfSense – Installing and setting up VPN with OpenVPN
pfSense is one of the best open source and FreeBSD based firewall available at present. It use to be a software firewall which now available as a hardware appliance as with support. Most of the default features offered are basically premium features with other software based firewalls. As I have promised, this post will explain [...]
pfSense – Access your firewall from anywhere with your Dynamic DNS host
In my previous article, I have explained about configuring Dynamic DNS with pfSense. My next article ideally should be using VPN with the DynDNS configured as I promised. However, that requires a complete explanation along with a careful consideration to make sure I don’t miss anything. I’m half-way through the [...]
pfSense – Configure Dynamic DNS with NoIP
pfSense is few of the most powerful yet, open-source software based firewall you can ever find. It serves and consists of most of the requirement an individual or an SME requires. However, I would not recommend such solutions for an enterprise level use with much higher expectations as pfSense might not fit into the bucket. [...]
pfSense – configuring Windows Active directory authentication
pfSense, one of the most powerful open-source firewall router (software based) which is completely based on FreeBSD OS family. Now you may assume, that you will need to know about terminal commands to control and manage this. Well, part of it is true as you will need to know about commands for any advancing purpose but not to [...]
Private, Public and Illegal IP Addresses
What is a Public IP address Public IP Addresses (also known as Static IP Addresses) are IP addresses that are visible to the public.Because these ip addresses are public, they allow other people to know about and access your computer, like a Web server.In some cases, you do not want people to access your computer or you want to [...]
How Address Resolution Protocol (ARP) Works
Followed by azker‘s article on OSI model Part-1 and Part-2. In this article I will explain what this ARP and why it’s important to know about it. In OSI Layers you see there are two types of addresses in OSI model. Network layer contains IP address and Datalink layer contains MAC address. When I was learning OSI Layers this [...]
Make your Home Server using Dynamic DNS
The purpose of this article is to explain about Dynamic DNS and it’s usage. I’ll walk through by setting up Dynamic DNS system for your server. What is Dynamic DNS and how it works In short it’s the replacement for the requirement of static IP. First you need to understand how DNS works, check out this [...]
How to Setup Zimbra Open Source Mail Server on Ubuntu 10.04
Discuss more about posts, topics & issues at our GeekLK Help Zimbra, an open source mail server is not just to send and receive emails but it’s a fully featured collaboration suite which includes calendar, tasks, file-sharing, IM, mobile support and many more… Now, I wanted to deploy an email server on my work [...]