Technical data

IN-ADDR.ARPA zone file for each network represented in the master zone file
including the loopback interface.
8.9.3 Loopback Interface Files
The loopback interface files define the zone of the local loopback interface, known
as
LOCALHOST
. There is a master zone file and a reverse zone file for
LOCALHOST
.
The resource record for this file defines
LOCALHOST
with a network address of
127.0.0.1. TCP/IP Services for OpenVMS configuration procedure creates these two
files and calls them
LOCALHOST.DB
and
127_0_0.DB
.
8.9.4 Hints File
The hints file contains information about the authoritative name servers for
top-level domains. You can obtain this information from the InterNIC. However,
the TCP/IP Services TCPIP$CONFIG procedure creates this file during the
configuration procedure.
8.10 BIND Resolver
The BIND resolver is a set of routines that is linked into each network application
that needs DNS name resolution services. The resolver formulates one or more
queries based on the resolver’s configuration and information supplied by network
applications; it sends the queries to a server to obtain an answer.
You can configure the following resolver features:
• Define the default domain.
• Specify a domain search list.
• Specifythenameserverstoquery.
• Specify a transport (either UDP or TCP).
• Specify a timeout interval for requests.
The Compaq TCP/IP Services for OpenVMS Management guide contains
information about how to configure the resolver.
8.10.1 Default Domain
The default domain is the domain in which the client host resides. When resolving
a query when just the host name is supplied, the resolver appends the default
domain to the host name and then processes the query. This is a convenience for
the user. It saves typing a fully qualified domain name.
8.10.2 Search List
The search list is also another convenience for the user. The default search list is
derived from the default domain and is applied if the user enters a domain name
that is not fully qualified.
8.10.3 Name Servers
You can configure the resolver to query any name server, including the local host,
and you can specify a maximum of three name servers. The resolver queries each
name server in the order listed until it receives an answer or times out.
Domain Name System/BIND (DNS/BIND) 8–9