BIND

BIND ( Berkeley Internet Name Domain ), previously called: Berkeley Internet Name Demon is the waiter DNS more used on Internet, especially on the systems of the type Unix and became in fact a standard. The first version of BIND was designed by four graduate students of the the University of California (Berkeley) on the basis of 4.3BSD. In 1988 it is Paul Vixie which undertakes the maintenance of the project. The software is maintained at present by Internet Systems Consortium.

A new version of BIND (BIND 9) was rewritten in order to solve certain architectural problems of the initial code and to add the support of DNSSEC ( DNS Security Extensions ). Other important points were included in this version: TSIG, notification DNS, Nsupdate, IPv6, support Multiprocessor as well as better a portability. It is currently a very widespread software within the systems Linux.

History

BIND was written at the beginning of the Années 1980 under the agreement of the Defense Advanced Research Projects Agency (DARPA). Starting from the middle of this same decade, the Digital Equipment Corporation (DEC) continued the development of BIND. One of the employees, Paul Vixie continued, in spite of its departure of DEC, to work on the project and currently helps ISC become responsible for the maintenance of the software.

The development of BIND 9 was carried out thanks to the combination of military and commercial contracts. An important part of the specifications of BIND 9 were brought by the companies of the " world Unix " so that they make sure that BIND would remain competitive with the offer of Microsoft in the field. The specifications related to DNSSEC are they due to the American armed which wished an important level of security.

Criticisms

Like Sendmail, WU-FTPD, and other systems dating from the beginnings from the Internet, BIND 4 and BIND 8 had good number of serious vulnerabilities related to safety. The use of these systems is strongly discouraged besides now. BIND 9 which is a complete rewriting is thus considered better on the sedentary level.

GeoDNS

GeoDNS is a patch BIND 9 which makes it possible to send answers DNS different according to the source from the requests. Generally it is the concept of proximity which is required.

For example, if a Web site has several waiters: in France, with the the United States and in South Korea, it is possible to define that the people of the continent of Europe will be directed towards the waiter French, the people of East Asia towards the Korean waiter , and the people of other parts of the terrestrial sphere towards the American waiter . That makes it possible to increase the performances and potentially to make economies with respect to a single localization and installation of a system of Répartition of load.

As it is a service based on DNS, it is easier to deploy than the system BGP anycast. It does not require any intervention near the Fournisseur of access to Internet and does not break any bond when the selected waiter changes. However, as it does not depend on the infrastructure of the network, it can prove less precise nearest in the search of the waiter.

References

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