Configuring and Managing MPE/iX Internet Services (July 2001)

222 AppendixC
BIND 8.1 Enhanced Features
BIND 8 Highlights
Interfaces The interfaces and ports that the server will answer queries from may
be specified using the listen-on option. listen-on takes an optional
port, and an address_match_list. The server will listen on all
interfaces allowed by the address match list. If a port is not specified,
port 53 will be used.
Multiple listen-on statements are allowed. For example:
listen-on { 5.6.7.8; };
listen-on port 1234 { !1.2.3.4; 1.2/16; };
If no listen-on is specified, the server will listen on port 53 on all
interfaces.
Query Address If the server doesn’t know the answer to a question, it will query other
nameservers. query-source specifies the address and port used for
such queries. If address is * or is omitted, a wildcard IP address
(INADDR_ANY) will be used. If port is * or is omitted, a random
unprivileged port will be used. The default is
query-source address * port *;
NOTE Query-source currently applies only to UDP queries; TCP queries
always use a wildcard IP address and a random unprivileged port.
Zone Transfers max-transfer-time-in Inbound zone transfers (named-xfer
processes) running longer than this
many minutes will be terminated. The
default is 120 minutes (2 hours).
transfer-format The server supports two zone transfer
methods. one-answer uses one DNS
message per resource record
transferred. many-answers packs as
many resource records as possible into
a message. many-answers is more
efficient, but is only known to be
understood by BIND 8.1 and patched
versions of BIND 4.9.5. The default is
one-answer. transfer-format may be
overridden on a per-server basis by
using the server statement.
transfers-in The maximum number of inbound zone
transfers that can be running
concurrently. The default value is 10.
Increasing transfers-in may speed
up the convergence of slave zones, but
it also may increase the load on the
local system.
transfers-out This option will be used in the future to