Friday, 29 April 2016

How to Configure Wi-Fi Access Point (Linksys)



Linksys Access Point : -When you planning to buy the Linksys access point for extend your existing wireless network, probably you have to know about how configure this device. may be other network devices you know the how to configure the IP address but there  there is no DHCP server, its mean when you connect in your PC it will not generated IP because its don't have any default IP address, therefore we can show you how to configure you Linksys Access Point step by step...

  • In your existing Router you should enable the DHCP Server.
  • You need to connect it in your existing switch (Cisco, Dlink .etc) and plug in power of access point.
  • Download the IP scanner and install in your PC.
  • Check your computer IP address, it should be on DHCP enable.
  • Now start the IP scanner and you will find the Linksys Access point in the list, its mean the your Access control adopted the IP address. 
  •  Now go to the Internet explorer and put the Access point unique IP address in address bar.
  • And you can configure it which desire IP you need to configure on Access point. 


Tuesday, 20 January 2015

Revolution of 5 Generation Wi-Fi Standard (802.11ac)

802.11ac is the next generation for wireless networks and manufacturers are now deploying equipment with this new technology and marketing the heck out of it. Now the question is when should you look at deploying it and what do you benefit from these new wireless solutions ?

If you have recently deployed an 802.11n network I wouldn’t worry about it. You still have lots of life left in your investment and unlike previous generations of wireless networks this one is ok to mix in with your current 802.11n wireless network. That means you can buy an 11ac AP here and there over time and replace or supplement your existing wireless network with these new APs. There are lots of things to consider though when deciding how to deploy this new technology but for right now we are going to focus on what does AC offer versus N wireless.

There are the mostly four factor revolution to use the 802.11ac.
  • Speed
  • Rang 
  • Capacity 
  • Compatibility 




Speed 

The first big gain we get with 802.11ac wireless is faster speeds. Faster speeds mean more bandwidth for everyone involved because the faster I can get you the data you requested the faster I can get to the next guy in line who is trying to get to his Vine video of the day. With 802.11ac the first generation of APs is going to provide up to 1.3Gbps of bandwidth. This is about 3x the bandwidth we can currently get from an 802.11n AP with dual radios today. The speeds of course are all dependent on optimal variables like, client device capability, distance from the AP, RF quality, etc… So suffice it to say that 802.11ac is like replacing your family sedan with a Ferrari!


Range


The first point to make is the 802.11ac standard lives entirely in the 5GHz spectrum. While some more modern routers broadcast 802.11n in 5GHz as well as 2.4GHz they remain relatively rare.  

Consequently, the 5GHz spectrum tends to be 'quiet', meaning much less interference from neighbourhood Wi-Fi. This more than counters the fact that, in lab conditions, 5GHz signals do not actually broadcast as far as 2.4GHz signals. 5GHz is also necessary to support the faster speeds of wireless ac. 


The second key factor is 802.11ac makes ‘beamforming’ a core part of its spec. Rather than throw out wireless signal equally in all directions, WiFi with beamforming detects where devices are and intensifies the signal in their direction(s). 

This technology has been around in proprietary form (it made a huge impact in the D-Link DIR-645), but now it will be inside every 802.11ac router and every 802.11ac device. 

The combination of these two technologies is profound. This was most clearly seen with the Linksys EA6500 which hit speeds of 30.2MBps (241.6Mbit) when connecting to a device just two metres away, but still performed at 22.7MBps (181.6Mbit) when 13 metres away with two solid walls in the way. By contrast Linksys’ own EA4500 (identical except being limited to 802.11n) managed 10.6MBps (84.8Mbit) dropping to 2.31MBps (18.48Mbit) under the same conditions. 

The real world result is 802.11ac not only enables you to enjoy the fastest 100Mbit (and beyond) fibre optic broadband speeds all over the house, but to enjoy it along with multiple streams of Full HD content, super low latency gaming and blazing fast home networking all at the same time. 

Capacity 

The next big gain 802.11ac provides us is better client capacity. With 802.11n wireless we recommended no more than 30-40 clients to an AP for optimal performance. This isn’t because of limitations in the access point hardware but rather limitations based on bandwidth. RF is a shared medium and there isn’t an unlimited amount of airtime or bandwidth. Because wireless clients are sharing the bandwidth on an AP each is only going to get a slice of the total amount of bandwidth offered by it. For instance, a dual radio 802.11n AP that provides 450Mbps to 50 clients is going to net each client about 9Mbps in total bandwidth. When you factor in overhead, spectrum interference, etc… the actual total bandwidth to the client will be much less. If my client count is less on the AP each client will have more bandwidth allocated to them. 25 clients on the same 802.11n AP will net 18Mbps per client which is much better than 9Mbps. With 802.11ac we have a lot more bandwidth to distribute and better methods of doing it so the client count can be much higher on an 802.11ac access point than on 802.11n.

Compatibility



The first thing to get out of the way is - like past Wi-Fi standards - 802.11ac is backwards compatible with 802.11b, g and n. This means you can buy an 802.11ac-equipped device and it will work just fine with your existing router. Similarly you can upgrade to an 802.11ac router and it will work happily with all your existing devices. That said you will need both an 802.11ac router and an 802.11ac device to enjoy the standard’s biggest benefits. And those begin with…


Tuesday, 4 March 2014

Free Five Faster FTP Clients

If you work corporate or open internet environment you should be require the FTP server to secure your data, first of all we should know "What is FTP Server ? " and why we've require to implement it.

What is FTP Server ?


FTP stands for "file transfer protocol." FTP powers one of the fundamental Internet functions and is the prescribed method for the transfer of files between computers. It is also the easiest and most secure way to exchange files over the Internet

Why is require for business environment ?

Setting up an FTP server becomes necessary for businesses that manage their own network and need to establish a file transfer connection to facilitate the exchange of documents between company employees. It is also needed by web hosting companies that empower their clients to upload websites to the hosting servers they are managing. Also, the installation of an FTP server application is a good solution if you're a person who needs to share a large number of files over the Internet.

Where we get FTP Client 

Most computer operating systems already come with an FTP client; however, it is not user-friendly.  Start up a command prompt window, type "ftp" and then press “enter.”  Chances are you will be greeted by an "ftp>" prompt. Unless you are well-versed with using command lines and enjoy typing, there are much easier ways to FTP.

FTP Explorer is an FTP client application.  It is designed to make FTP simple and hassle-free. Most people agree it is much easier to use than a command line FTP client. 
  or and access from anywhere or modify do your date you need FTP client 


FTP stands for "file transfer protocol." FTP powers one of the fundamental Internet functions and is the prescribed method for the transfer of files between computers. It is also the easiest and most secure way to exchange files over the Internet

Five Best FTP Clients

WinSCP (Windows)

WinSCP, Windows Secure Copy, is a free, open-source FTP client. Supporting both SFTP and SCP protocols (upshot: secure transfers), WinSCP is fast and lightweight while still supporting advanced features like remote text editing. When you open a plain text file, WinSCP can open the file in your text editor of choice. Every time you save the file, it transparently saves and uploads the changes to the remote server. Added bonus: a portable version is available. WinSCP's synchronized browsing feature is also worth a look.


Transmit (Mac OS X)

Transmit is a shareware ($30) FTP client packed to the brim with innovative features. It covers all of the usual suspects, including remote file editing and folder sync, and it's also got tons of Mac-centric features like a Dashboard widget, .Mac syncing of your favorites (bookmarked FTP servers), and droplets for quick drag-and-drop uploading to favorite locations, inline previews, and Automat or support. Transmit can even do server-to-server transfers from one server's tab to another's. Despite its $30 price tag, Transmit has even got some Windows users version



FireFTP (All Platforms with Firefox)

FireFTP is a Firefox extension that integrates a powerful FTP client directly into our favorite browser. FireFTP isn't the most feature-rich client of the bunch, but if all you need is a simple FTP client for the occasional upload or download, FireFTP is more than up for the job. Even better: You don't have to install a separate program for FTP, since it all runs from the warm and fuzzy comfort of the 'fox. If you're running Portable on your thumb drive, you can take FireFTP with you wherever you go.P

FileZilla (All Platforms)

FileZilla is a free, open-source FTP client for Windows, Mac, and Linux. Due to its price tag (or lack thereof), cross-platform support, and ease of use, FileZilla is a go-to option for many users new to FTP. Users stick around because FileZilla is a fast, full-featured (it also has remote file editing), and reliable FTP client in constant development. There's even a portable version you can toss on your thumb drive to use FileZilla on the go. Finally, if you're a Windows user you can even use FileZilla to build your own home FTP server.






Cyberduck (Mac OS X)


Cyberduck is a free, open-source FTP client for Mac OS X with support for most of the usual suspects in transfer protocols in addition to WebDAV and Amazon S3. It also supports Quick Look, Growl, and remote editing with your text editor of choice. Mac users who aren't happy with FileZilla and don't want to shell out any cash for Transmit can flock to the duck for full-featured FTP and then some.

Sunday, 26 January 2014

How to test Internet Speed through Command Prompt


Anybody who wants to test their connection speed can easily do so from a speed test web site — but that isn’t very geeky. Here’s how to do a test from the terminal prompt instead.

(Note: If you are using Windows, you’ll want to either have Cygwin installed, or have a copy of curl or wget installed. On the Mac you can use curl, but if you prefer wget, you’ll need to install that.)

Testing Internet Connection Speed with Curl

This is pretty simple. Just copy and paste the following command:

curl -o /dev/null http://speedtest.sea01.softlayer.com/downloads/test100.zip

The first thing to point out is that we’re using a test file from Softlayer, but if your connection is really fast, you might want to use a larger file from Thinkbroadband to properly test. Secondly, that -o switch is the lower case form of the letter O. It’s not a zero, and if you omit it, your terminal will turn into crazyville since curl will try to output to the screen — it’s also important because we’re outputting the file to /dev/null, which means it’ll basically be automatically deleted.

Testing Internet Connection Speed with Wget

If you prefer using wget, or that is what you have installed, the switch is the same. That is a capital letter “o” and it sends the output straight to null, so you don’t have any files to delete.

wget -O /dev/null http://speedtest.sea01.softlayer.com/downloads/test100.zip

This file is only 100 MB, so if you have a really fast connection, this isn’t going to work very well, and you’ll want to find a bigger file to download from the site linked above.

Tuesday, 25 June 2013

What is a DMZ ?


In computer networking, DMZ is a firewall configuration for securing local area networks (LANs).
In a DMZ configuration, most computers on the LAN run behind a firewall connected to a public network like the Internet. One or more computers also run outside the firewall, in the DMZ. Those computers on the outside intercept traffic and broker requests for the rest of the LAN, adding an extra layer of protection for computers behind the firewall.
Traditional DMZs allow computers behind the firewall to initiate requests outbound to the DMZ. Computers in the DMZ in turn respond, forward or re-issue requests out to the Internet or other public network, as proxy servers do. (Many DMZ implementations, in fact, simply utilize a proxy server or servers as the computers within the DMZ.) The LAN firewall, though, prevents computers in the DMZ from initiating inbound requests.
DMZ is a commonly-touted feature of home broadband routers. However, in most instances these features are not true DMZs. Broadband routers often implement a DMZ simply through additional firewall rules, meaning that incoming requests reach the firewall directly. In a true DMZ, incoming requests must first pass through a DMZ computer before reaching the firewall.


Saturday, 30 March 2013

Dropping Internet Connection in Linksys Router (WAG160N)




Last couple of month we are facing the problem of frequently dropping internet connection, and after the reset internet line from ISP we don’t get any change of situation, I asked to the ISP help desk but they doesn’t successfully resolve the issues.

Dropping connectivity is not good impact to business as well users, and after lots of goggling finally i got the solution of  dropping connection, I try to degrade the my Linksys Router (WAG160N), and its un-believable after degrade my problem is resolve. Now Internet connection is working perfectly and no more dropping .

So if you are also getting the problem of dropping Internet connection then try to degrade the router firmware.



Thursday, 27 December 2012

How to use Qos (Quality of Service) on Router



Quality of Service (QoS) is a feature of routers and switches which prioritizes traffic so that more important traffic can pass first. The result is a performance improvement for critical network traffic. QoS equipment is useful with VoIP phones or in LANs with high volumes of local traffic.

SETTING UP QOS 

The QoS settings can be found under Applications & Gaming -> QoS.
There are many ways to assign priority to your VOIP system.  I just used the IP address as shown below.  192.168.1.10 is the LAN private IP of the Asterisk system.


With the priority of the Asterisk box set to high, we should be all set.  It turns out that unless you cap the bandwidth, you will still have QoS problems.  Enter around 85% of your up and down bandwidth in the Uplink and Downlink boxes.  Capping the bandwidth is required to keep the latency low.  Otherwise, your bandwidth is filled up with large packets and the priority settings are not effective for VOIP traffic.  See http://www.dd-wrt.com/wiki/index.php/Quality_of_Service for more information.
With the above settings, VOIP calls are now clear even with other concurrent activities.
UPDATE:
Several people have reported being able to install dd-wrt on v6 WRT54 routers and the QoS configuration is the same.