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network access server tagged articles (0-50 of 20743)

  • Running NTP Server on Linux - The Network Time Protocol (NTP) is a standard protocol for synchronising time on computers and network equipment. NTP allows client computers to synchronise time with a NTP server over an Internet or Intranet network. The NTP protocol was originally developed for the Linux operating system.
  • Time Server's and the Importance of Synchronisation. - Time servers are like other computer servers in the sense they are usually located on a network. A time server gathers timing information, usually from an external hardware source and then synchronises the network to that time. Often time servers are synchronised to a UTC (Coordinated Universal time) source which is the global standard time scale and allows computers all over the world to synchronised to exactly the same time. This has obvious importance in industries where exact timing is crucial such as the stock exchange or airline industry.
  • The Significance of an accurate Time Server - This article demonstrates the implication of poor network time synchronisation and how significant it is to have network time in your Companies. Every Computer has a clock that sustains the internal system time. PC clocks have low- cost crystal oscillators that are notoriously prone to drift. Each Computer can drift at different rates. The time difference can become bigger and bigger over a period of time. This can lead to huge problems within the Company. This article conveys the value of network time synchronization and having an accurate network time server source in an organization. Computer Time: Computer system time is maintained by low cost real time clock and crystal oscillator components. Crystal oscillators are built with very low tolerance; each oscillates at a slightly different rate.
  • The Network Server's Role With VoIP - By now you are sure to have heard of VoIP (Voice over Internet Protocol). If not by advertising, you should have heard it from someone you know. If you have no idea what VoIP is, it is a calling system that allows you to make phone calls using your internet and a service provider. Why would someone want to use VoIP, you ask? Because VoIP offers many different options for people to choose from and is especially beneficial to those who make a lot of long distance calls.
  • Great Tips On Server Rentals - As a business owner, you may never have considered server rentals. You may be wondering when you would ever rent a server instead of buying. Here are just a few reasons why server rentals make sense: • Replication of Your Network for Training or Testing – Large-scale training or product testing projects can be resource-intensive. Many companies choose to create a separate, temporary network for these kinds of projects.
  • Use a NTP Server To Keep Precise Network Time - Computers systems have internal real-time clocks that are notoriously poor at keeping accurate time. Hence, the time on all computers and network devices can drift away from one another at different rates. This can be a real headache when trying to synchronise time-critical processes. However, it is quite simple to synchronise every device on your network to an accurate time reference - a NTP time server. NTP servers are Internet, or locally, based time references that maintain a highly precise time and make this time available to client computers.
  • How to Access Facebook From School or at Work - For those of you who are not familiar with social networking, you may be wondering what Facebook is all about. But you must be living in cave if you haven't heard about Facebook.
  • What Is A Virtual Private Network (VPN)? - A virtual private network (VPN) can either be a remote access or site-to-site network - whatever the case, you'll need specific software and hardware to build a VPN. For instance, you may need a desktop software client for each remote user, dedicated hardware (a concentrator or secure PIX firewall), a dedicated server for dial-up, a network access server for use by a service provider for remote users to access VPN, and a network and policy management center. There is no single way to put together a VPN, which is why most companies come up with a solution for their own needs. Most VPNs, however, make use of Cisco VPN technology simply because it is the most widely used equipment for networking in the world.
  • Web Hosting Services - After finishing your wonderful webpages, the next step would be to register for a domain name. And when you have that as well, you have to get those web pages hosted as a website in a public web server the internet recognizes. There are at least 5 different web hosting services available out there. Understanding each one can get you to use the right one that suits your budget and needs. 1. Self Hosting This requires a large one-time expense as you would be getting your own server and putting it online with your own network provider. This is the option taken mostly by corporations and institutions that prefer to have confidentiality needs and tighter control of their own websites.

  • How to Run a Network Time Server using Windows XP - Time synchronisation in modern computer networks is essential. It not only provides the only frame of reference between all devices, it is critical in everything from securing, planning and debugging a network to providing a time stamp for applications such as data acquisition or email. Microsoft Windows XP has a time synchronisation utility built into the operating system called Windows Time (w32time.exe) which can be configured to operate as a network time server. It can be configured to both synchronise a network using the internal clock or an external time source. For many applications, an internal clock can be quite adequate, although, on a network, problems can arise with applications such as sharing network files or in some environments even fraud, so it is vital for security reasons to use an accurate timing source for your network.
  • NTP Security: Authentication and Trusted Time References - NTP (Network Time Protocol) synchronises networks to a single time source using timestamps to represent the current time of the day, this is essential for time sensitive transactions and many system applications such as email. NTP is therefore vulnerable to security threats, whether from a malicious hacker who wants to alter the timestamp to commit fraud or a DDoS attack (Distributed Denial of Service - normally caused by malicious malware that floods a server with traffic) that blocks server access. However, being one of the Internet's oldest protocols and having been developed for over 25 years, NTP is equipped with its own security measures in the form of authentication.
  • Server-Based Computinng: In a Nutshell - Server-based computing (SBC) is one of the most exciting developments in office technology. But what exactly does the term mean? Here is a simple explanation. Server Based Computing vs. Standard Network Computing With a normal office network, every user has a fairly powerful computer on which they run software. The server is used for central file storage and specific tasks such as file exchange and internet access. With server-based computing, every user has a much smaller terminal, and all their day-to-day software is run from the server. Each terminal is little more than a screen and keyboard, although it can be an existing PC (an old one at that).
  • Why It’s Crucial To Have A Dedicated Server - A dedicated server is a single web server or computer on the internet that hosts websites and shows pages as viewers request. A dedicated server is within a network of computers, exclusively dedicated to one costumer or a large business, since it can meet many needs. Dedicated servers are most commonly used in the web hosting industry; hundreds of sites are hosted under one dedicated server. A dedicated server is considered to be the next step on from shared hosting environments. Having your own dedicated server makes you free of worry about other websites slowing you down or crashing your server. Dedicated servers also give you total control, and allows for installing software on your website that opens doors for gaining extra performance.
  • Computer Time Servers - A time server is computer hardware that performs the function of obtaining accurate time from a timing reference and transfers this time to network infrastructure and other clients. There are many time servers that reside on the Internet and serve accurate time. However, many organisations have their own independent time servers located on their local network, or intranet. A time server receives accurate time from an external timing reference to maintain precise internal time. There are a number of hardware clocks that a time server may utilise to obtain accurate time. One of the most common external hardware clock references is the Global Positioning System, or GPS. GPS satellites provide highly accurate timing and positioning information. The timing component of GPS transmissions is accurate to within a couple of hundred nanoseconds of the correct time.
  • Personal Preview About The Latest Windows Server - The last server edition is Windows or Windows Server 2003, although Microsoft issued Windows Server 2003 R2 during that period, it, after all, is not an independent new edition. Therefore, this incoming issue, Windows Server 2008, sets great store by Microsoft, and the characteristics related with Windows Server 2008 are repeatedly reported by the medium. Thereinto, many characteristics are familiar to most IT experts, but Windows Server 2008 still has some unbeknown characteristics or its characteristics are ignored by the majority.
  • Why is it Important to Properly Shut Down the Network Server? - Overview A network server is simply a centralized resource program or computer that services a network.
  • Entensys Campaign for Education helps pupils easily access Internet learning resources. - The essence of the campaign is to provide educational institutions with a complete, fully functional, easy-to–use and extremely secure Internet sharing solution at a minimal price, which connects an entire LAN to the Internet through a single IP address, as well as monitors and controls how users access the Internet with advanced access rules and...
  • Timing is Everything: NTP and the Importance of Accurate Network Time Synchronisation. - On occasion we all need to know the time and we have a multitude of different devices to tell us it; from our mobile phones and wrist watches to the office wall clock or the chimes on the radio news. But how accurate are all these clocks and does it matter if they are all telling different times? For our day-to-day business it probably doesn't matter too much if the office wall clock is faster than your wrist-watch your boss probably won't fire you for being a minute late. But in some environments accuracy and synchronisation are vital where a minute can make all the difference in something being sold or not or even something being stolen! Time synchronisation in modern computer networks is essential.
  • Installing and Configuring NTP on LINUX - NTP (Network Time Protocol) is an application developed to provide the synchronisation of computers and computer network devices. NTP defines algorithms and a protocol structure to accurately synchronise computer time. This article discusses how to install and configure the NTP Server application on a Linux machine to synchronise time with an Internet based public NTP Server. Internet based NTP time server systems fall into two categories: primary and secondary reference servers. Primary reference servers utilise a highly accurate external timing reference, such as GPS or radio clocks, to provide precise time. Secondart reference servers synchronise their time with primary reference servers and therefore offer slightly reduced accuracy. Primary reference time servers are stratum one servers, while secondary servers have a stratum greater than one.
  • Block your site such as facebook, myspace? Unblock facebook, unblock myspace very easily. - Are you sick of being observe like you are 10 years old? Does your school block access to Myspace, Facebook, Hi5, and other social networking sites? It used to be that when they blocked Myspace you would just start using Facebook or Hi5, but now they are blocking all social networking sites and this is just wrong. This happens at High Schools, Colleges, Universities, office network, and even in public libraries. Now are you in that situation?
  • VPS Hosting For Web Site Owners - If you're a webmaster who has grown your website or network of web sites to a point where you are attracting thousands of visitors per day you will probably need to start...
  • Why Wireless Networks Are More Vulnerable Than Wired Networks - The reason why wireless networks are more vulnerable than wired networks is that because the data is transmitted through the broadcast radio technology that works on the same microwave radio band (2.4 gigahertz) as cordless phones, instead of a dedicated cable. It is possible to be intercepted by hackers, especially if there is not a firewall installed because the networking transmissions are broadcast indiscriminately. Drive by hackers and casual intruders can pick up the radio signal 20 to 50 meters and as much as 500 meters if there is sensitive equipment. It is estimated that 30 percent of all wireless networks have already had a hacking attempt made, even though it is illegal.
  • NTP Time Servers for Precision Timing - Network Time Protocol, or NTP as it is most commonly known, provides a mechanism to synchronise the time of computer devices and other network infrastructure. The protocol was originally developed for the Linux operating system by Dr D Mills of the University of Delaware. For more than two decades, NTP has provided time synchronisation of critical devices on the Internet making it one of the oldest protocols still in continuous operation. This article provides a brief overview of NTP and some of the technical phrases used in computer timing. NTP was originally developed to solve the requirement of synchronisation of critical time processes across the Internet. The Network Time Protocols primary platform is the LINUX operating system. NTP is provided under the GNU public licence; however, it has also been sucessfully ported to the Windows operating system.
  • Configuring a Stratum 1 GPS Based NTP Server - The Network Time Protocol (NTP) was developed to provide a way of synchronising Internet clients to an accurate network time reference. NTP allows the time on client computers to be set to within a fraction of the correct time. The NTP protocol is a suite of programs designed specifically for time synchronisation purposes. The application source code is freely downloadable from the NTP website. Originally developed for the Linux operating system, NTP has since been ported to Microsoft Windows platforms. Combining an accurate external timing reference with the NTP application provides a highly accurate network timing device. This article describes how to utilise a low-cost GPS receiver in combination with the NTP software distribution to provide an accurate stratum 1 NTP server timing reference.
  • How To Browse The Web In China When Your Favorite Sites Are Blocked - If you want to see the differences between Google’s top level domains, try Google’s Image search from 2 different URLs: images.google.com images.google.cn Type in the Search box: “Tian'anmen Square massacre” or “Tian An Men Square massacre”. Ironically, this translates to “Gate of Heavenly Peace”. Convinced? It is well known that in China, certain websites like BBC and CNN are blocked. But you can get around it by use of a Proxy Server. What is a Proxy Server? A Proxy Server services requests from clients by forwarding requests to other servers. If you are computer “C”, and you want to access server “S” but it is blocked, point your client’s web browser to Proxy Server “P”. So C -> P -> S An example of such a site is www.kproxy.
  • What Is A Wireless Access Point? - What is a wireless access point? The wireless access point is the place for your wireless devices to connect to the network.
  • Killing Time; the Importance of Time Synchronisation in Criminal Cases. - On occasion, we all need to know the time and we have a multitude of different devices to tell us it, from our mobile phones and wrist watches to the office wall clock or the chimes on the radio news. But how accurate are all these clocks and does it matter if they are all telling different times? For our day-to-day business it probably doesn't matter too much.
  • What Is The Difference Between Collocated Servers And Dedicated Servers? - When it comes to hosting a website, many individuals are torn between whether to use collocated servers or dedicated servers. In fact, many individuals do not know the difference between the two.
  • Common NTP Server Terminology Explained - Much of the terminology associated with computer time synchronisation and NTP servers can be quite obscure. This article attempts to explain in simple language some of the terminology used in computer timing applications. NTP: NTP is the short hand name given to the Network Time Protocol; it is a standard protocol for distributing time around the internet and computer networks.
  • Computer Networking Simplified - So what is computer networking? To the uninitiated this term may sound intimidating but you may have already come across it or have even used it either at work or at home.
  • Key Features of Co-location - A company has many options available for handling computer systems along with sensitive data and one of these is server co-location.
  • Internet Connection Sharing Made Simple - If you want to connect a local area network (LAN) in your office to the Internet today, you have a number of options to choose from. The simplest is to buy a small stand-alone router or gateway. These devices are inexpensive, reliable and mostly plug-and-play. If you know what you’re doing, you can configure a router and network in less than an hour. However, this might not be your best choice. There are significant reasons why a router is not the best solution. How secure does your data need to be? Do you need (or would like) to know exactly how much Internet traffic each of your PCs consumes?
  • Ways to Get Low Cost Server! - Low Cost web hosting guides are all over the Internet, but finding the one that is going to best serve you might be difficult and take time. Finding a cheap web hosting guide gives you the ability to learn about where and how it is best to get hosting at a cost you can afford.
  • What is the Conficker Virus? - What is the Conficker Virus? The Conficker virus (aka Downup virus, Downandup virus, Conflicker virus, and Kido virus) is a worm. A worm is a type of virus that spreads itself through networks. Basically someone starts it up and it starts looking around a network that it is connected to - including the Internet - to find computers that are vulnerable to infection. What computers are vulnerable to the Conficker virus? Any computer that is or has been connected to a network (including the Internet) and running the following version of Windows: 1. Windows 2000 (very vulnerable) 2. Windows XP (very vulnerable) 3. Windows Server 2003 (very vulnerable) 4.
  • Maintaining Precise Time On Your Computer by Utilising NTP Servers - Computer servers and workstations have integrated real-time clocks that are based on simple, cheap, crystal oscillators. The real-time clock is battery backed and maintains system time even when the computer is switched off. However, crystal oscillators characteristics change significantly with temperature variation, which can cause the time to drift by several minutes each day. This article describes how Internet or Intranet based NTP servers can be utilised to maintain accurate time on a computer system. NTP, or Network Time Protocol, was originally developed over 25 years ago as a means of distributing accurate time around the Internet.
  • Cheapest Web Hosting Guide - Choosing a cheap web hosting package fit for you requires understanding what you’re in need of for your personal website.
  • How To Synchronise a Network - All computers maintain system time from an internal real-time clock chip. These devices are generally relatively low-cost and as a consequence tend not to keep good time. In fact, computers are notorious for providing inaccurate time and can drift by several minutes each day. This has serious consequences for networked computer systems and applications. Each computer can have wildly differing system times, which can be totally unacceptable for transaction processing applications. A solution is available in the form of network NTP servers. These allow all the servers, workstations and other infrastructure on a network to synchronise to a single accurate time reference. A Time Server obtains precise time from an external time reference and maintains an accurate internal time. This time is then made available to network clients for synchronisation.
  • NTP Servers Simplified - The Network Time Protocol, or NTP, is an internet protocol developed to distribute accurate timing information to network time clients. NTP is a client-server based protocol widely used throughout the Internet for accurate time synchronisation. This article describes some of the features of NTP and attempts to simplify some of the terminology used. NTP was originally developed 25 years ago by Dr David Mills of the University of Delaware. The protocol is one of the oldest Internet protocols still in continuous use. Originally developed for the LINUX operating systems, it has since been ported to the Microsoft Windows operating systems.
  • Stylish Pet Carriers advises on pet exercise and healthy walking - Choosing a cheap web hosting package fit for you requires understanding what you’re in need of for your personal website. Different plans and better servers become costlier based on quality, shared or dedicated servers, higher bandwidth, greater disk space, 24/7 courteous customer support and whether the web hosting provider is able to afford these benefits in order to be flexible with their price range for customers. Your hosting package depends on your website’s requirements, whether you are working for a big company in need of a virtual private server or a dedicated server web hosting package to maintain a large website with an expansive database, and a large archive of files in need of uploading onto the website.
  • Guide to Choosing the Right Server - Overview Finding a dedicated server is a crucial task when it comes to buying or updating IT equipment. It can make or break your IT applications, database management, maintenance and other computing applications. Hence, with the long list of servers or server brands that are available in the market nowadays, it is imperative that you find the one that will serve your specific IT needs. Follow this article to be guided in weeding out the better from the best of the available choices of IT servers. Determine your budget When it comes to IT servers, money will always be a big consideration but it must not be put over the server’s working features. Although it is a big decision factor, consider that servers are crucial to safeguarding your business’ success. It is what guards and takes care of your IT operations.
  • The Lost Eleven Days - Have you ever gone to bed one night and wondered just where the day went? Well could you imagine waking up to discover that eleven days had vanished completely? That is just what happened in 1752 when the entire inhabitants of Britain and America went to bed on Wednesday 2 September, only to awake on Thursday 14 September.
  • Get MCSE Certification Easily - MCSE 2003 Certification Get Certified in Days According to our survey, over 85% of the candidates acknowledge that they have spent needless time and money before finding the most suitable solution to pass the exams.
  • Keeping Accurate Time on Your Computer Using NTP Servers - Computer systems utilise low-cost timing components that keep very poor time. The timing chips and oscillators used by many PC circuit board manufacturers can cause system time to drift wildly, by minutes every day. For environments that require synchronised time over a range of processes or devices, an alternative must be found. This is where the Network Time Protocol, or NTP, comes in. NTP provides a low-cost software solution to the problem of computer time synchronisation. This article describes how NTP and Internet based NTP servers can be utilised to eliminate drift and to maintain synchronisation across a number of networked devices.
  • Calendars and the Measurement of Time - We are all aware of the passing of time; it governs us throughout our lives constantly ebbing away, dictating when we should eat, sleep, wake or work. Yet, the concept of time has baffled philosophers and scientists for millennia and we are still unsure of exactly what time is;
  • VPN Safe Secure Services Protection - First of all, what is VPN and why do you need VPN? You see, in today's world, security is a big concern. Thousands and even millions of dollars can be lost because of a security breach. When you have top secret or confidential information stolen, or if you have someone breaking into your computer system and deleting important information, you have a lot to lose. So in order to prevent that from happening, innovative developers have come up with a solution known as VPN (Virtual Private Servers). A VPN is meant to protect your system, as well as your network from being compromised. In other words, you don't want anyone to have unauthorized access to your system or network. That will help keep your data safe as you work. How VPN works.
  • Microsoft Access Database vs. Client Server Database - Throughout my time working with Microsoft Access, initially using it as a glorified spreadsheet package, I have gradually developed my skills to an advanced level but I still learn something new everyday. Every project takes my knowledge to a new level and I want the business world to realise just how versatile this product really is. Having built systems as complex as Reinsurance pool ledgers I know just how powerful it can be. It is a shame that the IT fraternity have always mocked its capabilities as a reliable database application.
  • Remote Diagnostics for Network Systems - When Software is Not Enough - One of the positive signs of company growth is the proliferation of branch office and additional remote locations. This growth is clearly to be welcomed, but also can present great challenges to IT teams.
  • How Dedicated Server Can Help Your Online Business - Almost everyone can find a need for a personal website. People are aware of the fact that web servers are necessary for web site development. Most small and medium sized companies can use a shared web hosting service until demand increases to a point where a dedicated server is necessary. Basically, a dedicated server is a web hosting computer that is devoted to the maintenance of a dependent internet site or internet business. A "dedicated" server is a computer that is dedicated to you and you alone.
  • Hang on a Second: History of the Leap Second - We have all heard of a leap year - that extra day added to the calendar every four years. It may give us a longer February but it is also essential in keeping our calendars and seasons accurate.
  • Linux vs Windows Web Hosting - When choosing a web hosting solution the first thing you should consider is the proper operating system for your project. The major hosting operating systems include Microsoft Windows and Linux. There are also solutions possible through Unix and Macintosh but these are less popular due to hardware and software support. This article will focus on the popular solutions of Windows and Linux. Based on a given requirement each operating system serves their unique purpose. Comparisons below are made about important aspects of each operating system. Security Security is one of the most important areas within the industry. It is a common misunderstanding that windows servers contain more vulnerabilities than Linux servers. Security risks are often the fault of the administration rather than the operating system.

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