BIND 8.1.2 Release Notes

New and Changed Features
New Features
Chapter 1 23
query-source address * port *;
NOTE query-source applies only to UDP queries; TCP queries use a wildcard
IP address and a random unprivileged port.
Zone Transfer Options
The zone transfer options are as follows:
max-transfer-time-in number;
Inbound zone transfers (named-xfer processes) that run longer than the
specified number is terminated. The default is value is 120 minutes (2
hours).
transfer-format ( one-answer | many-answers );
The server supports two types of zone transfer methods: one-answer and
many-answers. The first method uses one DNS message for every
resource record transferred. The second method packs many resource
records into a message. many-answers is more efficient than
one-answer, but is only compatible with BIND 8.1 and patched versions
of BIND 4.9.5. The default value is one-answer. You can override a
transfer-format statement with a server statement on a per-server
basis.
transfers-in number;
The transfer-in option specifies the maximum number of inbound zone
transfers that run concurrently. The default value is 10. Increasing the
value of transfers-in not only speeds up the convergence of the slave
zones, but also increases the load on the local system.
transfers-out number;
The transfer-out option specifies the maximum number of outbound zone
transfer that can run concurrently. This option is not supported in this
release. Currently, it is checked for syntax, but is otherwise ignored.
transfers-per-ns number;
The transfer-per-ns option specifies the maximum number of inbound
zone transfers (named-xfer processes) that run concurrently from a
given remote nameserver.