How to Supercharge Your Router with DD-WRT. Routing and Switching. The basics of using a proxy server for privacy and security. Patrick Lambert goes over the basics of how proxy servers work and why they are used to add security and privacy.
If you work remotely, or have to handle corporate files on the road, then chances are you've used a specific type of proxy and may not even be aware of it. In fact, proxies are used by workers all over the world in the form of a VPN. A virtual private network is one specific type of proxy which provides you with the ability to work remotely and securely. But what is a proxy exactly, how does it work, and what are some of the advantages it can give not only a remote worker, but anyone who wants an extra layer of privacy? Five free network analyzers worth any IT admin's time. If you work on a network, you then know the value of information.
Solid information leads to a strong and worry-free network (or at least as worry-free as you can manage). In order to gather that information, you need the right tools. The tools I speak of are network analyzers. Once you start looking, you can find analyzers of every shape, size, and price. See what process is using a TCP port in Windows Server 2008. Windows administrators sometimes have to track down network traffic or errant processes and then match that to network traffic.
Here are scripts that will aid in the connectivity forensics at the port and process level. IP subnetting made easy. George Ou explains IP subnetting using his own graphical approach.
It's a great primer for students and a nice refresher for others. Quick Tips: Flush the ARP cache in Windows 7. Jack Wallen shows you how to clear the Address Resolution Protocol cache and how to manage that cache with a few command switches.
The Address Resolution Protocol (ARP) cache is a crucial component of IP networking on any operating system. 10 things you shouldn't do when running network cable. Improperly installed cabling can cripple network performance, create maintenance headaches, and lead to hidden costs.
Here's where things can go wrong. Network cabling can be a finicky thing. There was a day when people without appropriate knowledge and training were tasked with running cable by virtue of their other responsibilities. For example, telephone techs and electricians used to be tapped because they were cabling people. However, while telephones cables can sometimes tolerate quite a lot of error, data cabling is less forgiving. Mistake 1: Not planning for the future Perhaps your organization has provisioned 100 Mbps network connections to the desktop for now, even though 1 Gbps has become pretty standard. Mistake 2: Using different cabling for voice and data Twisted pair cabling used to be expensive, so companies used to install different cabling for voice and data needs. Network diagrams highly-rated by IT pros. There is a site called RateMyNetworkDiagram, which allows users to upload their own network diagrams to be rated and critiqued by fellow networking professionals.
By their permission, I chose these 12 examples of some of the higher-rated diagrams in categories of Large, Small, Home, Network Racks (photos), and Funny. Maybe these will inspire you to get creative with your own network diagram creation. Submitted by user hodgesbo Selena has been at TechRepublic since 2002. 10 tips for troubleshooting DNS problems. Figuring out what's wrong with DNS will go faster if you have a set of troubleshooting steps to follow.
Brien Posey shares his approach to isolating the cause of DNS problems. DNS is one of the most essential services on any Windows network. Active Directory can't function without DNS, and it's is also used by any number of other network functions. So it's critical to troubleshoot DNS problems as fast as possible. Thankfully, the process is usually fairly easy. Note: This article is also available as a PDF download.
Harald Haas: Forget Wi-Fi. Meet the new Li-Fi Internet. 10 Ways to Troubleshoot DNS Resolution Issues. Introduction.
10 Ways to Troubleshoot DNS Resolution Issues. Netcat (UDP Tools -- Unix & Linux) Top 10 Tech Concepts You Always Wanted To Learn About (But Never Did) Store your data on someone else's computer, hope they don't do anything bad with it or decide to shut down.
Stallman calls it "Careless Computing". If you put personal data in-the-cloud like future plans., trips, your current GPS location, then you should expect that data to be shared all over the world with nice people, nice companies and criminals (looking for when to rob you). Facebook connections and twitter followers provide information about you and your friends. Open Wireless Movement. NAT. 5 Ways to Secure Your Wireless Router. Is someone accessing your router without your permission? Here's how to tell and what to do. Wi-Fi routers can give you enough headaches without worrying if someone is leeching off your connection. You pay for that bandwidth you receive every month, and with so many movies to stream, games to play, and work to remotely connect to, you don't want to share your Internet pipe.
Not only can having others access your router slow down your connection, but there is the possibility they might get you into some legal entanglements. An incident made news least year in which a man was falsely arrested in child pornography charges. While a false arrest is an extreme case, having unauthorized users can cause performance issues and pose a security risk. Melhore o sinal de sua rede sem fio com essas 10 dicas - Redes. Com as dicas a seguir, você será capaz de deixar sua rede sem fio ainda melhor e/ou resolver problemas que ela possa estar apresentando. Hoje em dia, redes wireless são extremamente comuns e devem se popularizar ainda mais com os hotspots públicos mantidos por operadoras. Em casa, no aeroporto, no escritório, em shoppings e muitos outros lugares podemos nos conectar a uma rede WiFi e evitar o consumo rápido da franquia de dados de nossos smartphones e tablets. Uma pena que às vezes podemos acabar enfrentando problemas com elas.
Mas nada tema, confira a lista a seguir e melhore o desempenho da sua rede! 01. Localização é tudo e por isso você deve manter o roteador no melhor local possível na sua residência. 02. As redes sem fio são divididas em até 13 canais, dependendo de onde você mora. 03. IPv4 Subnetting. IPv6. Networking - How can I find out where an email really came from? Understanding IP Classes - CompTIA Network+ N10-005: 1.3. Substituta do Wi-Fi, rede Li-Fi permite baixar até 30 filmes por segundo - Li-Fi - Economia. Pesquisadores da Universidade de Oxford atingiram um novo patamar de transmissão de dados via Li-Fi, uma espécie de evolução do Wi-Fi que transfere dados por luzes LED. As informações são do UOL Tecnologia. De acordo com o estudo, a velocidade máxima atingida foi de 224 Gbps (Gigabits por segundo). Com essa capacidade, dá para baixar 30 filmes (de 1,5 gigabyte cada) por segundo.