HP-UX IP Address and Client Management Administrator's Guide HP-UX 11i v2, HP-UX 11i v3

NS Name Server records. The NS records specifies the names of the name servers and the
domains for which the domain has authority. The domain for the name servers in the
example is the current origin (8.19.15.in-addr.arpa), because @ was the last domain
specified.
PTR Pointer records. PTR records are usually used to associate an address in the
in-addr.arpa domain with the canonical name of a host. The first PTR record in the
example file db.15.19.8 associates the name rabbit.div.inc.com with the address
119.8.19.15.in-addr.arpa. (The current origin is appended to the name 119 in
the first field, because it does not end with a dot.)
$TTL Indicates (in seconds) the time to live value for records that do not have the ttl value
defined in the data field.
Adding a Host to the Domain Data Files
You can add a host to the /etc/hosts file and run the hosts_to_named command to
automatically regenerate all the data files for the domain. You can also manually add the host
to all the domain data files.
Use the following procedure to manually add a host to the domain data files:
1. Edit the db.domain file and add an address (A) resource record for each address of the new
host, and add CNAME, HINFO, WKS, and MX resource records as necessary. Then, increment
the serial number in the SOA resource record by 1.
2. Edit the db.net file and add a PTR resource record for each host address. Then, increment
the serial number in the SOA resource record by 1.
3. Add the host to the /etc/hosts file.
CAUTION: If the host is not listed in the /etc/hosts file, and you accidently run the
hosts_to_named command, the db.domain and db.net files are overwritten, and the
host is lost.
See the sections “Master Server db.domain Files” (page 71) and “Master Server db.net Files”
(page 73) for examples of the db.domain and db.net files.
4. After modifying the domain data files, issue the following command to restart the name
server, which forces the name server to reload its databases:
/usr/sbin/sig_named restart
Deleting a Host from the Domain Data Files
You can delete the host from the /etc/hosts file and run the hosts_to_named command to
regenerate all the data files for the domain. You can also delete the host manually from all the
data files.
Use the following procedure to manually delete a host from the domain data files:
1. Edit the db.domain file and delete the A, CNAME, HINFO, WKS, and MX resource records
associated with the host. Then, decrement the serial number in the SOA resource record by
1.
2. Edit the db.net file and delete all the PTR resource records for the host. Then, decrement
the serial number in the SOA resource record by 1.
3. After modifying the domain data files, issue the following command to restart the name
server and force it to reload its databases:
/usr/sbin/sig_named
restart
74 Configuring and Administering the BIND Name Service