Configuring and Managing MPE/iX Internet Services (MPE/iX 6.5)

Appendix C 215
BIND 8.1 Enhanced Features
BIND 8 Highlights
Name Checking The server can check domain names based upon their expected client
contexts. For example, a domain name used as a hostname can be
checked for compliance with the RFCs defining valid hostnames.
Three checking methods are available:
ignore No checking is done.
warn Names are checked against their
expected client contexts. Invalid names
are logged, but processing continues
normally.
fail Names are checked against their
expected client contexts. Invalid names
are logged, and the offending data is
rejected.
The server can check names in three areas; master zone files, slave zone
files, and in responses to queries the server has initiated. If
check-names response fail has been specified, and answering the
client’s question would require sending an invalid name to the client,
the server will send a REFUSED response code to the client.
The defaults are:
check-names master fail;
check-names slave warn;
check-names response ignore;
check-names may also be specified in the zone statement, in which case
it overrides the options check-names statement. When used in a zone
statement, the area is not specified (because it can be deduced from the
zone type).
Access Control Access to the server can be restricted based on the IP address of the
requesting system. See address_match_list for details on how to
specify IP address lists.
allow-query Specifies whichhosts are allowed to ask
ordinary questions. allow-query may
also be specified in the zone statement,
in which case it overrides the options
allow-query statement. If not
specified, the default is to allow queries
from all hosts.
allow-transfer Specifies which hosts are allowed to
receive zone transfers from the server.
allow-transfer may also be specified
in the zone statement, in which case it
overrides the options allow-transfer
statement. If not specified, the default
is to allow transfers from all hosts.