![]() Now let's answer the main question: how a HTTP Sniffer can help those going to become better webmasters? By the way, in case you didn't know, the page you are reading now has been sent to your computer as a HTTP-response to a HTTP-request from your browser.Ĭonsequently, HTTP Sniffers is a class of programs that show how a browser and a server talk to each other. People surf the internet, participate in forums, listen to net radio, download files - all this involves HTTP protocol. ![]() a convention about web page transfer format. HTTP stands for Hypertext Transfer Protocol, i.e. Sniffers is a class of programs that allow you to observe the data that network computers send to each other. Of course you may be a good webmaster without knowing about HTTP as well as you may design web pages in your favorite WYSIWYG editor having no idea about HTML, but in both cases the knowledge of the "low level" technology would help to avoid numerous mistakes and to do your work faster and better.įirst let's deal with the terms. Never mind which programming language you prefer - php, asp or perl, on what server your site is running and which editor you use to design web pages - the result of your work will be delivered to a visitor's browser as HTTP-formatted message that consists of a header and a body. No matter you are a professional or a newbie, you can easily get anything about the HTTP traffic on your LAN. Its smart real-time analyzer enables on-the-fly content viewing while capture, analyze, parse and decode HTTP protocol.īy delivering an ease of use, and award-winning HTTP monitoring utility, the Colasoft EtherLook HTTP Sniffer has become the preferred choice of managers, network administrators and developers worldwide. Unlike most other sniffers, it is dedicated to capture IP packets containing HTTP protocol, rebuild the HTTP sessions, and reassemble files sent through HTTP protocol. Proper use of packet sniffers can help clean up network traffic and limit malware infections to protect against malicious use, however, intelligent security software is required.Colasoft EtherLook HTTP Sniffer is a HTTP packet sniffer, protocol analyzer and file reassembly software based on windows platform. It's then possible for hackers to attempt packet injection or man-in-the-middle attacks, along with compromising any data that was not encrypted before being sent. Once in place, the packet sniffer can record any data transmitted and send it to a command and control (C&C) server for further analysis. If a user is convinced to download malware-laden email attachments or infected files from a website, it's possible for an unauthorized packet sniffer to be installed on a corporate network. It's worth noting, however, that these analyzers can also be used for malicious purposes. Outward-facing sniffers scan incoming network traffic for specific elements of malicious code, helping to prevent computer virus infections and limit the spread of malware. Protocol analyzers are often used by companies to keep track of network use by employees and are also a part of many reputable antivirus software packages. Using a sniffer, it's possible to capture almost any information - for example, which websites that a user visits, what is viewed on the site, the contents and destination of any email along with details about any downloaded files. On a wireless network, most sniffers can only scan one channel at a time, but the use of multiple wireless interfaces can expand this capability. On a wired network, sniffers might have access to the packets of every connected machine or may be limited by the placement of network switches. Packet sniffers can be used on both wired and wireless networks - their efficacy depends on how much they are able to "see" as a result of network security protocols. Next is "filtered" mode, meaning analyzers will only capture packets that contain specific data elements. The first is "unfiltered," meaning they will capture all packets possible and write them to a local hard drive for later examination. It's possible to configure sniffers in two ways. These packets are intended for - and addressed to - specific machines, but using a packet sniffer in "promiscuous mode" allows IT professionals, end users or malicious intruders to examine any packet, regardless of destination. Sniffers work by examining streams of data packets that flow between computers on a network as well as between networked computers and the larger Internet. A packet sniffer - also known as a packet analyzer, protocol analyzer or network analyzer - is a piece of hardware or software used to monitor network traffic.
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