IP blocking

IP blocking

IP blocking prevents the connection between a computer or network and certain IP addresses or ranges of addresses. IP blocking effectively bans undesired connections from those computers to a website, mail server, or other Internet server.

IP banning is commonly used on computer servers to protect against brute force attacks. Both companies and schools offering remote user access, and people wanting to access their home computers from remote locations, use Linux programs such as BlockHosts, DenyHosts or Fail2ban for protection from unauthorized access while allowing permitted remote access.

It is also used for censorship. One example is the July 2003 decision by techfocus.org to ban the Recording Industry Association of America (RIAA) and Motion Picture Association of America (MPAA) from its website for various abuses by those two organisations of the content on it.

On an Internet forum or Web site an IP ban is often used as a last resort to prevent a disruptive member from access, though a warning and/or account ban may be used first. Dynamic allocation of IP addresses can complicate incoming IP blocking, rendering it difficult to block a specific user without blocking a larger number of IP addresses, thereby risking collateral damage caused by ISPs sharing IP addresses of multiple internet users.

IP banning is also used to limit the syndication of content to a specific region. To achieve this IP-addresses are mapped to the countries they have been assigned to. This has been used to devastating effect most recently to target Nigerian IPs due to the incorrect perception that all business emanating from the country is fraudulent. Thus making it extremely difficult for legitimate businesses based in the country to interact with their counterparts in the rest of the world.

Proxy servers can be used to bypass an IP ban unless the site being accessed has an effective anti-proxy script.

See also

*Firewall
*PeerGuardian
*ProtoWall
*Fail2ban
*DenyHosts
*BlockHosts
*SSHGuard
*Denial-of-service attack
*
*Proxy server

External Links

*


Wikimedia Foundation. 2010.

Игры ⚽ Нужна курсовая?

Look at other dictionaries:

  • Blocking — may refer to:In telecommunications: *Block size (data storage and transmission), the formatting of data into blocks for purposes of transmission, storage, checking, or other functions *Block storage, a sequence of bytes or bits, having a nominal… …   Wikipedia

  • Blocking (improv) — Blocking or denial is a term used in theatrical improvisation to describe an act of not accepting the world that has been set up, or of refusing to develop an action that another performer has offered .In general, blocking prevents improvisers… …   Wikipedia

  • Blocking (stage) — Blocking is a theatre term which refers to the precise movement and positioning of actors on a stage in order to facilitate the performance of a play, ballet, film or opera.[1] The term derives from the practice of 19th century theatre directors… …   Wikipedia

  • blocking minority — ˈblocking miˌnority noun [countable usually singular] FINANCE if someone has a blocking minority, they own a large number of shares in a company, and they therefore have the power to prevent other companies from buying or taking control of it * * …   Financial and business terms

  • Blocking (animation) — Blocking is an animation technique in which key poses are created to establish timing and placement of characters and props in a given scene or shot. Blocking is most commonly used in 3D computer animation.Blocking is often the first step in the… …   Wikipedia

  • blocking antibody — n an antibody that combines with an antigen without visible reaction but prevents another antibody from later combining with or producing its usual effect on that antigen called also incomplete antibody * * * any antibody that by combining with… …   Medical dictionary

  • blocking stake — UK US noun [C] ► FINANCE, STOCK MARKET BLOCKING MINORITY(Cf. ↑blocking minority) …   Financial and business terms

  • Blocking Property of Certain Persons Who Threaten Stabilization Efforts in Iraq — is an executive order signed into law by U.S. President George W. Bush on July 17, 2007 in a stated attempt to reduce the flow of material support for insurgents and terrorists in the Iraq war. The Order provides a means by which to disrupt… …   Wikipedia

  • blocking motion — noun Notice of intention to bring up a certain matter at a future date, thus preventing (or blocking) raising of the subject on a motion for adjournment • • • Main Entry: ↑block …   Useful english dictionary

  • Blocking — Block ing, n. 1. The act of obstructing, supporting, shaping, or stamping with a block or blocks. [1913 Webster] 2. Blocks used to support (a building, etc.) temporarily. [1913 Webster] …   The Collaborative International Dictionary of English

  • Blocking course — Block ing course (Arch.) The finishing course of a wall showing above a cornice. [1913 Webster] …   The Collaborative International Dictionary of English

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”