Technical data
NFS Client
21.1 Key Concepts
21.1.2.3 Creating Customized Default ADFs
You can create customized default ADFs for special applications. To do so:
1. On the client, create a special application file that results in creating an ADF
on the server. Suppose that application file is called
TEST.GAF
.
2. On the server, check the listing for the newly created file. For example:
>ls-a
.
..
.$ADF$test.gaf;1
test.gaf
Note that the ADF (
.$ADF$test.gaf;1
) was created with the data file
(
TEST.GAF
).
3. On the server, copy the ADF file to a newly created default ADF file on the
client. For example:
> cp .\$ADF\$test.gaf\;1 gaf.adf
Note that the backslashes (\) are required for entering the UNIX system
nonstandard dollar sign ($) and semicolon (;) symbols.
4. On the client, copy the new default ADF file to the SYS$SYSTEM directory.
For example:
$ COPY GAF.ADF SYS$COMMON:[SYSEXE]TCPIP$GAF.ADF
5. Dismount all the NFS volumes and mount them again. This starts another
NFS ancillary control process (ACP) so that the newly copied default ADF file
can take effect.
21.1.3 How the NFS Client Authenticates Users
Both the NFS server and NFS client use the proxy database to authenticate
users. The proxy database is a collection of entries used to register user
identities. To access file systems on the remote server, local users must have
valid accounts on the remote server system.
The proxy entries map each user’s OpenVMS identity to a corresponding NFS
identity on the server host. When a user initiates a file access request, NFS
checks the proxy database before granting or denying access to the file.
The proxy database is an index file called TCPIP$PROXY.DAT. If you use the
configuration procedure to configure NFS, this empty file is created for you.
You populate this file by adding entries for each NFS user. See Section 21.3 for
instructions on how to add entries to the proxy database.
Note
The configuration procedure for the NFS server creates a nonprivileged
account with the user name TCPIP$NOBODY. You may want to add a
proxy record for the default user (-2/-2) that maps to the TCPIP$NOBODY
account.
NFS Client 21–3