Category Archives: OS

Networking Setup

CCTV

Out of the box most device are set-up with DHCP protocols and this will make it pretty easy for the end user just to plug the device in and get it connected. But if you are in a larger more complex network you might need to set up a static ip for the device. In most windows devices you can use the wizard walk you through it but if you need to setup like 20 ip cameras you should at least know the basics. I’ll use windows for this as it is the easiest to capture. If you go to Control Panel>Network and Internet> Change Adapter Settings>(connection which you want to set up)>Internet Protocol Version 4 (TCP/IPv4)>properties. You will finally reach a window like this:

I you are in a network that has DHCP enable all you have to do is have “obtain and ip address automatically” check and the number fields will be grey out. But if you to setup up a static IP for you machines you will need to have these filed filled out. Usually the network administrator will give you the information you need to fill in the slots.

But a quick rundown is the IP address that is assigned is basically the address for the device. Anyone looking for the camera will use this ip address to connect with it.

The subnet mask is used to create vLANs. A vLAN is basically a subdivided part of the network that only other devices with the same subnet mask can see and interact with. It is used for security and organization purposes.

The Gateway is is the device on the network usually a router that will allow the device you are setting up to access other networks like the internet.

I’ll go into more about the DNS and subnetting later, but in summation once you know what these numbers are you can easily setup any device on a network easily not just a windows machine.

Virtualization Overview

OS

Virtualization is a important technology in use in enterprise computing. Virtualization basically lets you run multiple instances of software that normally runs on specific hardware on virtual hardware. For example an instance of window which you would normally install on a “bare metal” computer can be installed on a “virtual” hyper V machine. This allow you to use a single device to run multiple machines worth of computing.

Virtualization has quite a few benefits included utilization efficiency. If you have a server that isn’t being utilized for office users you can set up a virtualized instance for say a security system. You can basically use that hardware for several purposes.

Another huge benefit is your server become hardware agnostic you can basically copy that instance of the server onto another physical server and have it run there. So if you business relies on a certain piece of software you can move it to a cheaper host or to your own server when you need it.

There are quite a few companies that develop virtualization software the larger ones are Microsoft and their Hyper V product, Citrix’s Xen,  VMware’s ESXi, Oracle’s VM. There are also a free open source alternative like proxmox, or oracle’s virtualbox.

Windows Server Overview

OS

Windows server is a version of windows that is design to work on a network to process data from multiple sources and multiple users. It is mostly a GUI based OS but admins can use powershell to work with it in command line. It includes some exclusive features that make it able to act as a backbone to huge enterprise networks.

One of those is its Active Directory set of programs and protocols. Active Directory Domain Services helps networks authorize and authenticate users. It also limits those users to access command and features that they’re are approved for. Basically if your logging into a large institutions network chances are you interacting with a Windows Server AD DS service.

Another very important feature of Windows servers is it’s DNS services or Domain Name Server. This logs and coordinates the networks resources including other computer, servers, access points, printers, POS systems. The DNS server in Windows Server helps device on the network find each other.

Also Windows Server handles SQL databases. You can have a separate Database server if you’d like but Windows Server can handle it on the same instance and includes all of the redundancy features that you might need to keep you data safe.

Group Policy Servers allow you to set those rules that limit users ability to access resources on the network, like printers or features on local machines.

Cisco’s IOS Overview

cisco

Cisico’s IOS operating system is very different from Apple’s iOS, and the two should not be confused. Ciciso’s IOS is an operating system design to work on very specific hardware, mainly routers and switches that Cisco sells. Is is a command line only system that runs with very low over head that means cisco’s equipment can be very efficient not worrying about user interfaces and graphical processing. That means the size of the OS is still remarkable small most versions of IOS are around 8 MB to Download and 32 MB to run. One of the requirements to download are registering with Cisco and having a service contract to actually run IOS on your equipment. It is generally not available to the public. While non tier 3 switches don’t need IOS, as their hardware is ASIC based. Tier 3 switches inherit functionality from routers and need knowledge of IOS to configure. One of the most interesting qualities of Cisco IOS and routers is the fact that they’re designed to require little or no user interaction in their service life. This “Bullet-Proof” quality of their products is important to most companies as networks are often the backbone that keeps the company working. All vital networks should have redundancies to deal with any issue that might come up. So who should use Cisco routing and switching gear? really most businesses that rely on their computer for daily business but we’re seeing more and more businesses that require solid networks in their locations like fast food restaurant integrating self serve POS terminal for their customers.