Unsupported Features

no-round-robin

This option was used in BIND 8.1.2 to turn off the default round robin, which cycles returned IP addresses for multi-homed hosts.

named-xfer

This option is obsolete because it is part of the named binary.

deallocate-on-exit

This option is no longer in use as the server now always checks for memory leaks.

fake-iquery

This option is obsolete and is always set to “no”, thus not allowing to simulate DNS IQUERY, which is not used in BIND 9.2.0.

statistics-interval

This option was used in BIND 8.1.2 to log statistics of the nameserver at regular intervals. The logging consumes a lot of memory and degrades the response time.

multiple-cnames

This option was used in BIND 8.1.2 to allow multiple CNAME records in violation of the DNS standards. BIND 9.2.0 strictly enforces the CNAME rules both in master files and dynamic updates.

has-old-clients

This option is now implemented through the “auth-nxdomain yes” and “rfc2308-type1 no” options.

treat-cr-as-space

This option was used in BIND 8.1.2 to make the server treat carriage return \r characters, the same way as a space or tab character, or to facilitate loading of zone files on a Unix system that were generated on an NT or DOS machine. In BIND 9.2.0, both Unix “\n” and NT/DOS “\r\n” newlines are always accepted.

use-id-pool

This option is now obsolete as BIND 9.2.0 always allocated query IDs from a pool.

fetch-glue

This option was used in BIND 8.1.2 to cause the server to fetch glue resource records it does not have when constructing the additional data section of a response.

serial-queries

This option was used in BIND 8.1.2 to set the maximum number of concurrent serial number queries allowed to be outstanding at any given time. BIND 9.2.0 does not limit the number of outstanding serial queries and ignores the serial-queries option.

check-names

This option was used in BIND 8.1.2 to check the hostnames as per standards.

topology

The topology statement takes an address_match_list and interprets it in a special way. Each top-level list element is assigned a distance.

rfc2308-type1 yes_or_no

If this option is set to yes, the server sends NS records along with the SOA record for negative answers. The default is no.

min-roots

This option specifies the minimum number of root servers that is required for a request for the root servers to be accepted. Default is 2.

unix

This option in controls statement is not supported in BIND 9.2.0.