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Authentication and authorisation are often thought of as a single process but the two are actually distinct operations that may even use separate storage locations for the authentication and authorisation data. Authentication is about verifying identity, based on one or more factors, for example something that someone knows (e.g. a password), something that someone holds (e.g. a smart card), something that someone is (e.g. biometric information). Obviously the use of multiple-factor identification increases security. Authorisation is about controlling access to a resource based on access control lists and other policies; however secure authorisation is dependant on authentication in order to ensure that the security principle requesting access is who they say they are. Kerberos authentication explained | markwilson.it
BIND is open source software that implements the Domain Name System (DNS) protocols for the Internet. It is a reference implementation of those protocols, but it is also production-grade software, suitable for use in high-volume and high-reliability applications. BIND is available for free download under the terms of the ISC License , a BSD style license. ISC developed and maintains BIND 9, the current version. Our ability to maintain this software and be actively involved in furthering core Internet protocols is directly dependent on community subsidy and participation. Please consider supporting us by joining the BIND Forum , part of ISC's Software Guild . BIND
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