Setting general preferences for name service
The following preferences may be defined and apply to all services
(master, slave, or stub) provided by a name server:
Selecting name servers to use as forwarders
To select the forwarders for a name server:
-
Select
Server
Forwarders.
-
Select whether only forwarders should be used to resolve queries (slave mode).
-
For each name server that will receive forwarded queries,
enter its IP address and click on Add
to add it to the list.
-
Click on OK to exit.
Selecting name servers to be ignored
To select name servers to which queries should not be sent:
-
Select
Server Bad servers.
-
For each name server to be ignored,
enter its IP address and click on Add
to add it to the list.
-
Click on OK to exit.
Selecting hosts and networks that can request zone transfers
To define name server hosts and networks that can request
zone transfers from a master name server:
-
Select
Server Requesters.
-
For each server or network,
enter its IP address and click on Add
to add it to the list.
-
Click on OK to exit.
NOTE:
You can override the global list of allowed requesters
for an individual zone on its master name server.
To define name server hosts and networks that can request
zone transfers for an individual zone:
-
If you are not already entering information about the zone,
select the zone from the list of those defined, and select
Zones Modify.
-
Click on
Requesters.
-
For each server or network, enter its IP address
and click on Add to add it to the list.
-
Click on OK to exit.
Setting limits on the operation of the name server
To set limits on the operation of a name server:
-
Select
Server Limits.
-
You can change the values of the following fields:
- Transfer limit inbound
-
This controls the maximum number of inbound zone transfers
that can be run concurrently on a slave name server.
The default value is 10.
You may want to set this value higher if your server
acts as a slave name server to many zones,
but this may adversely impact its performance
by demanding extra memory and network resources.
- Transfer limit outbound
-
This value will be used by a future release of BIND
to limit the maximum number of concurrent outbound zone transfers
that can be run on a master name server.
At present, it is ignored.
- Transfer per name server
-
This controls the number of simultaneous zone transfers from a
single name server that can be started on a slave name server.
The default value is 2. You can set this value higher if your server needs
to pull information about many zones from a single name server but this may
adversely affect the performance of both servers.
- Data segment size
-
This controls the maximum amount of virtual memory that the name server
can allocate to store authoritative and cached data. The default value is
64MB. This limit may be too small for dedicated name servers
with more than 64MB of physical memory.
-
Click on OK to save the changes.
Setting options on the behavior of the name server
To set advanced options on the behavior of a name server:
-
Select
Server Options.
-
You can adjust the behavior of the name server using the following fields:
- Recursion
-
If set to Yes (default), the name server will try to answer recursive
queries and will cache non-authoritative data that it discovers.
If set to No, the name server will try to answer with
a referral to another name server rather than the
actual data whenever it receives a query for a name for which
it is not authoritative. This is used to stop an authoritative server's
cache from growing in size or becoming polluted with non-authoritative data.
NOTE:
Do not set this option to No
on a server that clients will use for name service.
- Fetch glue
-
If set to Yes (default),
the name server will fetch missing ``glue'' records when constructing
a response. Glue records are A records that a zone stores for the
name servers in its subdomains. These records allow the name server to respond
to queries for the IP addresses of the servers in the subdomains.
If set to No, the name server will not fetch missing glue.
This can be used in conjunction with Recursion set to No
to prevent a name server's cache from growing in size or
becoming polluted with non-authoritative data which may be incorrect.
NOTE:
Do not set this option to No
on a server that clients will use for name service.
- Query log
-
If set to Yes, log all queries via syslog.
If set to No (default), do not log queries.
NOTE:
Setting this option to Yes can quickly create a large file.
-
Click on OK to save the changes.
© 1999 The Santa Cruz Operation, Inc. All rights reserved.
UnixWare 7 Release 7.1.1 - 5 November 1999