Technical Library

Domain Name System

Introduction

Integration

The WKS resource records describe the services provided by the specified host. The simplest way to tell which well-known services are run on your system is to view the /etc/services file.

If a service is not in that file, then it should not be displayed in a WKS record. A host can have, at most, two WKS records, one for TCP (Transmission Control Protocol) and one for UDP (User Datagram Protocol).

The format of the WKS records is:

The components of the WKS record are described below.

host

This is the name of the host providing the services.

address

The IP-address of the host specified in the host field.

protocol

This is the transport level protocol through which the service communicates. This is either TCP or UDP.

services

This is a list of services provided by this host. Items in the lists are separated by spaces, and parenthesis are used to continue the list beyond one line.

The TXT resource records are simply strings of text, and the strings are enclosed in quotation marks. Any additional comments about hosts can be documented using this record type. Versions of BIND prior to 4.8.3 do not support TXT records.

The format of the TXT records is:

The components of the TXT record are described below.

host

This is the name of the host associated with the information presented in the text field.

text

This is any comments/information that you wish to define associated with the host in the host field. This string of text must be enclosed in quotation marks.

The HINFO record provides a brief description of the hardware and software used by the specified host. Currently, no widely used system makes use of the HINFO records. Essentially, it provides information.

The format of the HINFO records is:

The components of the HINFO record are described below.

host

This is the name of the host for which you are providing hardware and software information for.

hardware

This identifies the hardware used by this host. If the hardware definition contains any spaces, then the definition must be enclosed in quotation marks. A blank space separates the hardware field from the software field.

software

This identifies the operating system software used by this host. If any blanks occur in this definition, then it must be enclosed in quotation marks.