Blog About Techno And Science News | Esncoimbra.com

Archive for February, 2012

To be truly prepared for your CCNA and CCNP exams, you need real hands-on experience with real Cisco routers and switches. However, a production network is a really bad place to practice your configurations, but an excellent way to get fired and/or sued. The key to becoming a true CCNA and CCNP is assembling your own Cisco home lab.

You don’t have to spend a lot of money to do so; used Cisco equipment is cheaper than ever. It’s robust as well – I’ve bought literally hundreds of used routers and switches over the years and have had very few problems. I owe much of my skill to practicing configurations and troubleshooting in my own home lab.

2501 routers are fantastic for CCNA and CCNP home labs. They come with two serial interfaces, allowing you to connect one interface directly to another router (you’ll need a DTE/DCE cable for that, too) while connecting another to a frame relay switch if you like. If you don’t have a frame relay switch, you can connect a 2501 directly to two other routers via the serial interfaces.

You also have an AUI port, which requires a transceiver to operate as your Ethernet interface. Transceivers are pretty cheap and readily available from Cisco resellers and ebay vendors, so pick one up for each 2503 you decide to buy.
Read the rest of this entry »

Port forwarding, often referred to as .tunnelling. is the forwarding of network ports from one network device to another. This is commonly done using a NAT (network address translation) enabled router or server and another computer within the local network. The main purpose of using port forwarding is to allow hosts outside your local network who doesn.t have their own public IP address access to some services running on machines within your LAN.
Port forwarding is easy to set up on a router since the management interface allows for easy configuration. In some cases this easy configuration feature might be a problem since most routers cannot provide complex customization for port forwarding and other services. In such case a Linux box can do the job. With Linux, port forwarding is configured by adding iptable rules with a DNAT target to the PREROUTING chain and a SNAT target to the POSTROUTING chain. After doing so iptables will use the existent masquerade table to rewrite packages so they will reach the desired host in concordance with the port forwarding rules you provided. This is similar to OSX and BSD, however ipfw is used. In most cases ipfw is already compiled with kernel.
With port forwarding you can use a router to connect to the Internet and also run a web-server or a FTP server on a computer with your LAN. By using port forwarding you can instruct the router to forward all information that comes on a specific net port (such as 80 for the web-server or 21 for the FTP server) to a host within the local network. This means that if an outside host try to make a HTTP request towards the public IP the router has, it will be sent to the machine known to handle such request within the LAN. This is done in a transparent manner, meaning that the network client is not aware of the fact that he is accessing a machine found somewhere in the LAN. Applications of such methods are widely used both in business environments and in small home networks.
With more and more devices in the home needing to be connected to the internet or to each other, the router has become a very popular device worldwide. In such situations port forwarding is used to allow access within the network for applications that require access on a specific port, such as games or multimedia streaming software.eaming softwaR.th port forwarding you can use a router to connect to the Internet and also run a web-server or a FTP server on a computer with your LAN. By using port forwarding you can instruct the router to forward all information that comes on a specific net port (such as 80 for the web-server or 21 for the FTP server) to a host within the local network. This means that if an outside host try to make a HTTP request towards the public IP the router has, it will be sent to the machine known to handle such request within the LAN. This is done in a transparent manner, meaning that the network client is not aware of the fact that he is accessing a machine found somewhere in the LAN. Applications of such methods are widely used both in business environments and in small home networks. Read the rest of this entry »

Medium-sized companies require ERP solutions to help expand their market. However, the cost can be prohibitive unless the company is already a large enterprise. ERP systems hosted on cloud computing services provide an affordable but effective alternative to traditional solutions.

ERP or Enterprise Resource Planning systems are an effective tool for business growth that offers comprehensive information management functionality. It keeps track of every facet of the company, from accounting to customer care and more. Its monitoring produces analytics that allow companies to streamline business processes and find growth avenues.

Unfortunately, implementing an ERP system is expensive. Aside from the costly hardware, per core software licensing agreements and the vendor’s support contracts can be too heavy on a company’s budget. There is also the necessity of hiring an IT staff to manage it. Thus, only large companies with considerable resources can afford it.

Thankfully, cloud computing has brought about cost-effective solutions for medium-sized enterprises looking to invest in ERP systems. These enterprises can now look into cloud-hosted ERP systems, such as Microsoft Dynamics ERP. Instead of buying hardware, licensing software and signing support agreements, companies only need to contract with a provider that will provide cloud services with ERP functionality.

However, medium enterprises without expert IT staff still face challenges, such as proper ERP configuration and staff training. Engaging an IT consulting firm overcomes these problems by delegating IT support to expert professionals.

All Covered is a trusted IT consulting firm that is well versed with different cloud computing services. They focus on helping small and medium businesses achieve their IT goals. For inquiries, call 1-866-446-1133 or visit AllCovered.com.

IT revolution has enabled business organizations to be more efficient in their performance in multiple ways. Well, business accounting software is one such by-product of IT revolution that has made it easier for business entities to maintain their balance sheets and other accounting aggregates.

The IT industry has come up with different software solutions for different business entities. For a bigger organization, software packages comprise of additional features to meet vast accounting requirements of the organization. Similarly, for small business entities, a good number of small-business accounting software are on the block. They come with sufficient features to facilitate smooth maintenance of various accounting aggregates and related financial statements.

Let’s find out what all small accounting software can do for your business and what are their basic features.

A decent small business accounting software proves very helpful in day-to-day maintenance of inflow and outflow of accounts. It enables you to keep a fair detail of your revenues and expenses that help you in making business forecasting.

Modern software packages keep clear records of invoices, bank deposits, purchase records, expected cash flow and other such aggregates. You also get to know about relative status of these accounting aggregates. It helps in regulating undesirable expenses thus help increase profit of the company.

Since most people operate small scale business through internet now a days, online accounting and business features in the software are must.

There are a good number of small business accounting software in the market with varying features. While choosing one for yourself you must ensure that the software enjoys credibility by other small business organizations.

More innovated versions of these software have been also found coming up with auto financial details with the help of data fed under different categories of receipts and payments.
Read the rest of this entry »