I am making a new blog about everything in the web Wonderings of a web geek (you know, there are already many of these kinds of blogs) but my blog will be different. It will be the best blog of a web geek in the planet!
Something that I already write to you enjoy:
Wonderings about how many backlinks are needed to have a determined PageRank
I wish you a good read on this blog!
I am the author/administrator of the site “Enfotainer - Enfotain your mind!”
This is also a new blog and contains various hot informations regarding Entertainment, Technology Updates, Healthcare, Games, Fun, and a variety of posts. I now will be updating the blog on a more frequent basis and get you all with some real good quality contents all the time. I want to make my blog really helpful to the readers.
Thanks to you all!
In the meantime, do check some popular posts:
How to Deal with Kitchen Oil Fire
And if you like some good, fun-filled brainteasers, here are some links: Find out how sharp your brain is!
I want to share with you all of my cars tips. I am a car dealer with 12 years of experience in this business. Many people don’t care about observe and analyse more about the history of the car when they need to buy one. Many people too doesn’t know very well the difference about one new and one used car. But on my blog Generalities About New And Used Cars I give the information you need to be a more informed buyer.
We talk there about the Chevrolet Corvette History and Problems and we talk too about the Ford Mustang Pony Car History, Problems and Solutions.
We have many articles too about negotiationg of cars with a car dealer like these:
What you need to know about negotiating new or used cars prices with a dealer
How to find a place to buy your used car
Learn tricks to save money buying your used car
I hope you can find my blog useful. When you want to buy a new or used car think: it is much better to get some tips with a good dealer!
I recently moved back to Colorado, after living in Phoenix Arizona for 5 years. I was a big hiker and camper when I lived in Colorado before, but did not do much of that when I was in Arizona. Now that I have moved back, I am trying to get back into both activities so I decided to start a blog to motivate me to get back outside and do the things I love to do. I hope you enjoy my journey and find some of my tips and tricks to be informative as well as my reviews of trails. So come to my blog about hiking and camping in Colorado.
We all fall in love some time in our life. But the time in which we have our first crush is usually our teenage. It can be the bollywood ka King Khan, Shah Rukh Khan or the dream boy of hollywood Tom Cruise. Many also fall in love with their girl next door or boy next door. But these teenage love affairs gets very little importance and most parents take it casually. But these should not be the way. We all have a right to fall in love. But a lack of importance and help from parents and elders in these things lead to broken relationships and hearts. There should be some place where teenagers can get help on how to have a smooth love life and how to continue with it. As I live in one part of the world it is not possible for me to help out eeveryone. So, the method to go with is the internet. So, I have made a site on teenage love life and advice so that there is atleast one place where teenagers can get some help in their love life. I will be happy if I could help. Here is the site Teenage Love.
Also sometimes breaking up becomes inevitable. So, there is page on it too. Also There is a page on teen dating advice and ways to confess love.
Whether you love or loath them Proxy Servers are here to stay, Proxy Servers have many uses and are a vital part of todays Internet experience.
Below we try to explain the different types of proxy servers and their uses
Caching proxy server
A proxy server can service requests without contacting the specified server, by retrieving content saved from a previous request, made by the same client or even other clients. This is called caching. Caching proxies keep local copies of frequently requested resources, allowing large organizations to significantly reduce their upstream bandwidth usage and cost, while significantly increasing performance. There are well-defined rules for caching. Some poorly-implemented caching proxies have had downsides (e.g., an inability to use user authentication). Some problems are described in RFC 3143 (Known HTTP Proxy/Caching Problems)
Web proxy
A proxy that focuses on WWW traffic is called a “web proxy”. The most common use of a web proxy is to serve as a web cache. Most proxy programs (e.g. Squid, NetCache) provide a means to deny access to certain URLs in a blacklist, thus providing content filtering. This is usually used in a corporate environment, though with the increasing use of Linux in small businesses and homes, this function is no longer confined to large corporations. Some web proxies reformat web pages for a specific purpose or audience (e.g., cell phones and PDAs).
Content Filtering Web Proxy
A content filtering web proxy server like SafeSquid[1] or DansGuardian helps distribute Internet access while providing control to the administrators over the content delivered. It is usually used in organizations or schools to ensure that Internet usage conforms to the local acceptable use policy. A content filtering proxy must necessarily accommodate the demands of granular rules for Internet access privileges and restrictions across an enterprise.
A content filtering proxy can be used to filter out unwanted content, using methods such as URL or DNS blacklists, URL filtering, MIME filtering, or keyword filtering.
A content filtering proxy may support authentication, to control access to the web. It usually produces logs, either to give detailed information about the URLs accessed by specific users, or to monitor bandwidth usage statistics. It may also communicate to daemon based and ICAP based antivirus software to provide security against virus and other malware by scanning incoming content in real time before it enters the network.
Anonymizing proxy server
An anonymous proxy server (sometimes called a web proxy) generally attempts to anonymize web surfing. These can easily be overridden by site administrators, and thus rendered useless in some cases. There are different varieties of anonymizers.
Access control: Some proxy servers implement a logon requirement. In large organizations, authorized users must log on to gain access to the web. The organization can thereby track usage to individuals.
Hostile proxy
Proxies can also be installed by online criminals, in order to eavesdrop upon the dataflow between the client machine and the web. All accessed pages, as well as all forms submitted, can be captured and analyzed by the proxy operator. For this reason, passwords to online services (such as webmail and banking) should be changed if an unauthorized proxy is detected.
Intercepting proxy server
An intercepting proxy (also known as a “transparent proxy”) combines a proxy server with a gateway. Connections made by client browsers through the gateway are redirected through the proxy without client-side configuration (or often knowledge).
Intercepting proxies are commonly used in businesses to prevent avoidance of acceptable use policy, and to ease administrative burden, since no client browser configuration is required.
It is often possible to detect the use of an intercepting proxy server by comparing the external IP address to the address seen by an external web server, or by examining the HTTP headers on the server side.
Transparent and non-transparent proxy server
The term “transparent proxy” is most often used incorrectly to mean “intercepting proxy” (because the client does not need to configure a proxy and cannot directly detect that its requests are being proxied).
However, RFC 2616 (Hypertext Transfer Protocol — HTTP/1.1) offers different definitions:
“A ‘transparent proxy’ is a proxy that does not modify the request or response beyond what is required for proxy authentication and identification”.
“A ‘non-transparent proxy’ is a proxy that modifies the request or response in order to provide some added service to the user agent, such as group annotation services, media type transformation, protocol reduction, or anonymity filtering”.
Forced proxy
The term “forced proxy” is ambiguous. It means both “intercepting proxy” (because it filters all traffic on the only available gateway to the Internet) and its exact opposite, “non-intercepting proxy” (because the user is forced to configure a proxy in order to access the Internet).
Forced proxy operation is sometimes necessary due to issues with the interception of TCP connections and HTTP. For instance interception of HTTP requests can affect the usability of a proxy cache, and can greatly affect certain authentication mechanisms. This is primarily because the client thinks it is talking to a server, and so request headers required by a proxy are unable to be distinguished from headers that may be required by an upstream server (esp authorization headers). Also the HTTP specification prohibits caching of responses where the request contained an authorization header.
Open proxy server
Because proxies might be used for abuse, system administrators have developed a number of ways to refuse service to open proxies. Many IRC networks automatically test client systems for known types of open proxy. Likewise, an email server may be configured to automatically test e-mail senders for open proxies.
Groups of IRC and electronic mail operators run DNSBLs publishing lists of the IP addresses of known open proxies, such as AHBL, CBL, NJABL, and SORBS.
The ethics of automatically testing clients for open proxies are controversial. Some experts, such as Vernon Schryver, consider such testing to be equivalent to an attacker portscanning the client host. [2] Others consider the client to have solicited the scan by connecting to a server whose terms of service include testing.
Split proxy server
A split proxy is a proxy implemented as two programs installed on two different computers. Since they are effectively two parts of the same program, they can communicate with each other in a more efficient way than they can communicate with a more standard resource or tool such as a website or browser. This is ideal for compressing data over a slow link, such as a wireless or mobile data service, as well as for reducing the issues regarding high latency links (such as satellite internet) where establishing a TCP connection is time consuming.
Taking the example of web browsing, the user’s browser is pointed to a local proxy which then communicates with its other half at some remote location. This remote server fetches the requisite data, repackages it, and sends it back to the user’s local proxy, which then unpacks the data and presents it to the browser in the standard fashion.
Some Web accelerators are proxy servers. Some reduce the quality of JPEG images to speed transmission. Some use a split proxy with special protocols and local and remote caching. (See Google Web Accelerator.)
Reverse proxy server
A reverse proxy is a proxy server that is installed in the neighborhood of one or more web servers. All traffic coming from the Internet and with a destination of one of the web servers goes through the proxy server. There are several reasons for installing reverse proxy servers:
Security: the proxy server is an additional layer of defense and therefore protects the web servers further up the chain.
Encryption / SSL acceleration: when secure web sites are created, the SSL encryption is often not done by the web server itself, but by a reverse proxy that is equipped with SSL acceleration hardware. See Secure Sockets Layer.
Load balancing: the reverse proxy can distribute the load to several web servers, each web server serving its own application area. In such a case, the reverse proxy may need to rewrite the URLs in each web page (translation from externally known URLs to the internal locations).
Serve/cache static content: A reverse proxy can offload the web servers by caching static content like pictures and other static graphical content.
Compression: the proxy server can optimize and compress the content to speed up the load time.
Spoon feeding: reduces resource usage caused by slow clients on the web servers by caching the content the web server sent and slowly “spoon feeds” it to the client. This especially benefits dynamically generated pages.
Extranet Publishing: a reverse proxy server facing the Internet can be used to communicate to a firewalled server internal to an organization, providing extranet access to some functions while keeping the servers behind the firewalls.
Circumventor
A circumventor is a method of defeating blocking policies implemented using proxy servers. Ironically, most circumventors are also proxy servers, of varying degrees of sophistication, which effectively implement “bypass policies”.
A circumventor is a web-based page that takes a site that is blocked and “circumvents” it through to an unblocked web site, allowing the user to view blocked pages. A famous example is ‘elgooG’, which allowed users in China to use Google after it had been blocked there. elgooG differs from most circumventors in that it circumvents only one block.
Students are able to access blocked sites (games, chatrooms, messenger, social networking, etc.) through a circumventor. As fast as the filtering software blocks circumventors, others spring up. It should be noted, however, that in some cases the filter may still intercept traffic to the circumventor, thus the person who manages the filter can still see the sites that are being visited.
Circumventors are also used by people who have been blocked from a web site.
Another use of a circumventor is to allow access to country-specific services, so that Internet users from other countries may also make use of them. An example is country-restricted reproduction of media and webcasting.
The use of circumventors is usually safe with the exception that circumventor sites run by an untrusted third party can be run with hidden intentions, such as collecting personal information, and as a result users are typically advised against running personal data such as credit card numbers or passwords through a circumventor.
At schools and offices
Many work places and schools are cracking down on the web sites and online services that are made available in their buildings. Since circumventors are used to bypass censors in computers, web sites like Orkut, MySpace, Bebo, Xanga, Silkroad Online, YouTube, Miniclip, Facebook, Gaiaonline and other non-work or school related social web sites have become targets of mass banning.
Proxy Web server creators have become more clever allowing users to encrypt links, and any data going to and from other web servers. This allows users to access websites that would otherwise have been blocked.
A special case of web proxies are “CGI proxies”. These are web sites that allow a user to access a site through them. They generally use PHP proxy or CGI proxyto implement the proxying functionality. These types of proxies are frequently used to gain access to web sites blocked by corporate or school proxies. Since they also hide the user’s own IP address from the web sites they access through the proxy, they are sometimes also used to gain a degree of anonymity, called Proxy Avoidance.
Managed ‘clean-pipe’ proxy servers
Used in an increasing number of work-places, especially those with multiple Internet breakout points. Currently an emerging technology to rival in-house, hardware solutions. Many consider this a branch of Software as a Service or Security as a Service. Providers include AT&T and ScanSafe.
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This is a new blog where you are the author. You can blog about your website and let the world know about it.
Simply Register for an account:
Once you log in, you will be able to write a post about your website or anything you like. Posts will be accepted or rejected depending on content.
Porn, violence, hate etc… will not be accepted.
You’re the blogger now so get to it!