AS112 Nameserver Operations

Many sites connected to the Internet make use of IPv4 addresses thatare not globally unique. Examples are the addresses designated in RFC1918 for private use within individual sites. Devices in suchenvironments may occasionally originate Domain Name System (DNS)queries (so-called "reverse lookups") corresponding to those private-use addresses. Since the addresses concerned have only localsignificance, it is good practice for site administrators to ensurethat such queries are answered locally. However, it is not uncommonfor such queries to follow the normal delegation path in the publicDNS instead of being answered within the site. It is not possible forpublic DNS servers to give useful answers to such queries. Inaddition, due to the wide deployment of private-use addresses and thecontinuing growth of the Internet, the volume of such queries is largeand growing. The AS112 project aims to provide a distributed sink forsuch queries in order to reduce the load on the IN-ADDR.ARPAauthoritative servers. The AS112 project is named after the AutonomousSystem Number (ASN) that was assigned to it. This document describesthe steps required to install a new AS112 node and offers advicerelating to such a node's operation. This document is not anInternet Standards Track specification; it is published forinformational purposes.