Configuring Domain Name Files
Create or Modify the Resolver File
Create or Modify the Resolver File
The resolver file (RESLVCNF.NET.SYS) is an initialization file for the domain name resolver. It contains information needed by the network to determine how to resolve a domain name to an IP address. This file is read by the resolver routines the first time they are invoked by a process.
To create the resolver file, perform the following steps:
| Step 1. Copy the sample file, RSLVSAMP.NET.SYS, to RESLVCNF.NET.SYS. | |
| Step 2. Modify RESLVCNF.NET.SYS using any ASCII editor so that it contains | |
| information about the name servers, domain, and search order for your | |
| network. The keywords included in the file are described under “Fields.” | |
| To modify an already existing RESLVCNF.NET.SYS file, simply use your | |
| editor to update and save the existing file. | |
Fields | Each entry in the resolver file consists of a keyword followed by a value | |
| separated by white space. The keyword and its associated value must | |
| appear on a single line and the keyword must start the line. Figure | |
| shows an example of a resolver file. Comment lines start with a pound | |
| sign (#). |
|
| domain | Enter the local domain name. Most queries for names |
|
| within this domain can use short names relative to the |
|
| local domain name. If the host name does not contain a |
|
| domain part, the root domain is assumed. If more than |
|
| one instance of the domain keyword is present, the last |
|
| instance will override. |
|
| The domain name is composed of labels, with each label |
|
| separated by a period. Each label must start with a |
|
| letter or digit, and have as interior characters only |
|
| letters, digits, hyphens |
|
| name may have any number of labels, but its total |
|
| length, including periods, is limited to 255 characters. |
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| label[.label][...] |
|
| Domain names are not case sensitive. |
| search | The search entry is optional and indicates the order in |
|
| which domains should be searched for host name |
|
| lookup. You should add a search entry if users on this |
system commonly try to connect to nodes in other domains. The search list is limited to six domains with a total of 256 characters. If more than one instance of the search keyword is present, the last instance will override.
166 | Chapter 12 |