Bogon filtering

Bogon filtering

A bogon is a bogus IP address, and an informal name for an IP packet on the public Internet that claims to be from an area of the IP address space reserved, but not yet allocated or delegated by the Internet Assigned Numbers Authority (IANA) or a delegated Regional Internet Registry (RIR). The areas of unallocated address space are called the bogon space.

Bogons are not the same as reserved private address ranges, such as those in 10.0.0.0/8 and 192.168.0.0/16, which are reserved for private networks.[1]

Many ISPs and end-user firewalls filter and block bogons, because they have no legitimate use, and usually are the result of accidental or malicious misconfiguration. Bogons can be filtered by using router ACLs, or by BGP blackholing.

IP addresses that are bogon today may not be bogon tomorrow. IANA and other registries frequently assign new address space to ISPs. Announcements of new assignments are often published on network operators' mailing lists (such as NANOG) to ensure that operators have a chance to remove bogon filtering for addresses that have become legitimate.

For example, addresses in 49.0.0.0/8 were not allocated prior to August 2010, but are now used by APNIC.[2] As time goes on, the IPv4 address exhaustion will mean there are fewer and fewer IPv4 bogons.

IANA maintains a list of allocated and reserved IPv4 netblocks.[2]

Contents

Etymology

The term bogon stems from hacker jargon, where it is defined as the quantum of bogosity, or the property of being bogus. A bogon packet is frequently bogus both in the conventional sense of being forged for illegitimate purposes, and in the hackish sense of being incorrect, absurd, and useless: see "Quantum bogodynamics".[3]

The term bogon in the US is pronounced about the same way as bogan is in Australia. The Australian term is often used to describe people of lower socioeconomic status, similar to the term redneck that is used in the US. The University of Melbourne was one of the first locations to start filtering the unallocated IP addresses[citation needed] because of their high costs of international traffic and it appears that bogon may have derived from conversations between network administrators on different sides of the TransPacific Internet link.

See also

References

  1. ^ Rekhter (February, 1996), "Address Allocation for Private Internets" (txt), Network Working Group, http://www.ietf.org/rfc/rfc1918.txt, retrieved 2010-03-18 
  2. ^ a b "IANA IPv4 Address Space Registry". IANA. 2010-02-22. http://www.iana.org/assignments/ipv4-address-space/. Retrieved 2010-03-18. 
  3. ^ "bogon - The Jargon File". Retrologic Systems Online Jargon File. http://www.retrologic.com/jargon/B/bogon.html. Retrieved 2010-03-18. 

External links


Wikimedia Foundation. 2010.

Нужна курсовая?

Look at other dictionaries:

  • Bogon — may refer to:* Bogon, Shwegu, a village in Burma * Bogons, fictional particles used in quantum bogodynamics * Bogon filtering, a kind of IP packet * An island in the South Pacific that was used in the 1952 Ivy Mike hydrogen bomb testee also*… …   Wikipedia

  • Denial-of-service attack — DoS redirects here. For other uses, see DOS (disambiguation). DDoS Stacheldraht Attack diagram. A denial of service attack (DoS attack) or distributed denial of service attack (DDoS attack) is an attempt to make a computer resource unavailable to …   Wikipedia

  • Quantum bogodynamics — is a humorous theory arising within hacker culture that characterises the bogosity of the universe. Bogosity is a humorous term used to describe the degree to which something is bogus. The unit of bogosity is the microlenat, named after Douglas… …   Wikipedia

  • Martian packet — A Martian packet is an IP packet which specifies a source or destination address that is reserved for special use by Internet Assigned Numbers Authority (IANA) and cannot actually originate as claimed or be delivered.[1] Martian packets commonly… …   Wikipedia

  • Application delivery network — An Application Delivery Network (ADN) is a suite of technologies that, when deployed together, provide application availability, security, and acceleration. At the core of an ADN is the Application Delivery Controller (ADC), an advanced traffic… …   Wikipedia

  • List of Internet topics — This page is a list of Internet topics. AlphanumericTOC align=center nobreak= numbers= externallinks= references= top=| A Abilene Network Ad hoc network Address resolution protocol Aggregator (news aggregator) ADSL AirPort All your base are… …   Wikipedia

  • IP hijacking — (sometimes referred to as BGP hijacking or Prefix Hijacking ) is the illegitimate take over of groups of IP addresses by corrupting Internet routing tables. The Internet enables communication between two IP addresses anywhere in the world. This… …   Wikipedia

Share the article and excerpts

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