Posts Tagged ‘internet’

Popular download managers for GNU/Linux

Friday, September 4th, 2009

When I first started using GNU/Linux some years ago, there were very few download managers and most of them were less capable when compared to those present for windows based operating systems like FDM, IDA, DAP, etc. So I was forced to use them on WINE for all http downloads. But now the Linux world has seen some drastic changes, you name it they have it or will start developing one (There are a few exceptions to these though). Of course Firefox is a great alternative for download managers but not always reliable. So here are few good download managers,

  1. Wget: GNU wget is a free software tool to download files using HTTP/HTTPS/FTP protocols and has no GUI but a commandline tool. This is very powerful and supports some very good features. Some features include,
    • Can use wild-card url’s and recursively mirror directories.
    • Supports cookies & proxies
    • Can convert absolute links in downloaded documents to relative, so that downloaded documents may link to each other locally
  2. Gwget: Gwget is a very simple download manager from gnome projects. Though there are no advanced features like some others but does its job to perfection. It can be installed from most distributions repositories. Some catchy features include,
    • Recursivity: Gwget detects when you put a html, php, asp or a web page dir in the url to download, and ask you to only download certain files (multimedia, only the index, and so on).
    • Drag & Drop: You can d&d a url to the main gwget window or the notification area icon to add a new download. gwget (more…)

Did you delete all your Cookies? Well, I say no…

Thursday, August 13th, 2009

Have you ever heard of Flash Cookies/Locat Shared Object? Flash cookies are cookie-like data, stored on the user’s computer. These are similar to http-cookies but can’t locate them on web browser. Flash Cookies can store 100KiloByte of information by default, but settings can be made to store unlimited amount of data (Limited by your HDD).

Local Shared Objects are not temporary files, but they stay until deleted manually. But there is an option to opt-out by disabling them on the Adobe website. Also Firefox add-ons like BetterPrivacy can help you with LSO. Here is how to disable the LSO storage on your computer.

  • Visit Adobe Flash setting manager website by clicking here
  • Go to Global Storage Settings tab which is second one
  • You will see setting manager something like belowadobe1
  • You can change the slider to None and un-check both the settings, as shown below, but be careful, you may not be able to view flash content again in that browser.adobe2

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Some useful security related Firefox add-ons

Tuesday, August 11th, 2009

Firefox, a famous Web Browser from Mozilla Foundation, which provides a great web experience for its users. It has a great past since its first public release in 2004 and hope it will continue. One attractive feature of this browser is it Add-ons. There are numerous add-ons available for Mozilla Firefox and most of them are developed by its users and some by Mozilla Foundation itself. Among them some addons are really useful for tweaking our web experience. Here are some add-ons which I feel really useful,

  • WOT (Web Of Trust), warns you about risky websites that try to scam visitors, deliver malware or send spam. This add-on shows you various colors to indicate how risky it is to visit that website. You can also vote against a particular website. Click here to visit add-on website.
  • No Script: Allow active content to run only from sites you trust, and protect yourself against XSS and Clickjacking attacks. This addon is very very useful, it will not allow any scripts to be executed in the background unless you mark particular website as trusted, which leads to much safer internet. Also blocks many flashy ads thus leads website to load faster, a noticable change in speed can be experienced on http://www.computerworld.com. Click here to visit add-on website.
  • Adblock Plus: This Firefox add-on comes to great use when blocking ads and banners which can be annoying sometimes. Though ads are the source of revenue of most websites (exception: wikipedia), it is advisable to use this add-on on sites which has too many flashy ads and takes lot of bandwidth to load. Click here to visit add-on website.
  • CryptFire: This is a super cool add-on used to encrypt and decrypt the text using strong AES algorithm. To test this, you can go to cryptfire.com website, type in some secret content and add a password to it. Now the message is encrypted and a tiny url link is provided in the middle of the page which can be sent to your friend who knows the password. He can decrypt and view message using cryptfire. Click here to visit add-on website

These are only few useful ones I am aware of. You are always welcome to explore more add-ons on mozilla add-ons website.

What’s wrong with Social Networking sites?

Sunday, August 9th, 2009

Most of us are users of not one but atleast few social networking sites, among them popular ones are facebook, myspace, twitter, orkut. People are so addicted that they own an Internet connection only for social networking related tasks, I see no point in wasting so much time on these web 2.0 marvels. Most think what’s wrong in having an account which is available at free of cost and help connect to known and unknown friends, yes there are hidden dangers from social networking sites.

The secrets you reveal on a social site is priceless for an hacker which he can use for anything ranging from marketing to computer attacks to deadly Distributed Denial Of Service attacks. Recently Twitter (a famous micro-blogging website) was down for 2 hours and the prime reason was users clicking on malicious links. Example Scenario: You accept a friend request from some unknown user and click on malicious link provided in a private message sent by him, then your computer is compromised.

Despite reading this post you may think, why should I care?, there are millions of users so the posibility is minimal, I am just lucky, I trust the website, I trust my friends, I say all excuses are rubbish just make sure that none of your sensitive information is public.

Google Chrome inches towards Apple Safari for 3rd spot

Tuesday, August 4th, 2009

Web browsers are must application in this Internet generation, but there are only a handful of browsers compete against each other.

Google Chrome already racing to 3rd position despite coming very late to the market, though the brand name drive it to a larger extent. From the statistics provided by Market Share by Net applications Google Chrome is holding 2.59% of market share, Apple Safari is holding 4.07 %. Other notables are IE continue to struggle as Mozilla Firefox continue to strengthen it market cap, while Opera is steady at 5th position.

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This work by Mallikarjun is licensed under a Creative Commons Attribution 2.5 India.