添加zone "10.in-addr.arpa"，Zone 信息使用空文件

青岛大学内部的 DNS 服务器一般不使用迭代查询，即不向根服务器查询到何处去找该域名记录，而是向可信外部DNS服务器发起请求。

关于迭代查询，dig 实用工具手册中的解释：dig makes iterative queries to resolve the name being looked up. It will follow referrals from the root servers, showing the answer from each server that was used to resolve the lookup.

NSD 是一个高性能的权威 DNS 服务器实现，是 DNSSEC 的实验环境，有一台根服务器使用 NSD。

编译参数：

./configure --prefix=/opt/nsd --sysconfdir=/etc --localstatedir=/var --with-zonesdir=/etc/nsd/zones --with-dbfile=/var/lib/nsd/nsd.db

一个配置文件的例子，曾用于 OSQDU 美国总部内部评测的 NSD

nsd.conf

server:
        ip-address: 192.168.29.10
        hide-version: no
        debug-mode: no
        ip4-only: no
        ip6-only: no
        database: "/var/lib/nsd/nsd.db"
        identity: "OSQDU US Evaluation DNS"
        server-count: 1
        tcp-count: 10
        tcp-query-count: 0
        tcp-timeout: 10
        pidfile: "/var/run/nsd.pid"
        port: 53
        statistics: 3600
        username: 60001.60001 
        zonesdir: "/etc/nsd/zones"
 
# ---- Zone Configuration ----
zone:
        name: "us.osqdu.org"
        zonefile: "us.osqdu.org.forward"
        provide-xfr: 192.168.29.0/24 NOKEY
        outgoing-interface: 192.168.29.10
zone:
        name: "29.168.192.in-addr.arpa"
        zonefile: "192.168.29.reverse"
        provide-xfr: 192.168.29.0/24 NOKEY
        outgoing-interface: 192.168.29.10

NSD 在 Solaris 10 中配置为 SMF 服务所需的 XML 文件

nsd.xml

<?xml version="1.0"?>
<!--
CDDL HEADER START
 
The contents of this file are subject to the terms of the
Common Development and Distribution License (the "License").
You may not use this file except in compliance with the License.
 
You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
or http://www.opensolaris.org/os/licensing.
See the License for the specific language governing permissions
and limitations under the License.
 
When distributing Covered Code, include this CDDL HEADER in each
file and include the License file at usr/src/OPENSOLARIS.LICENSE.
If applicable, add the following below this CDDL HEADER, with the
fields enclosed by brackets "[]" replaced with your own identifying
information: Portions Copyright [yyyy] [name of copyright owner]
 
CDDL HEADER END
-->
<!DOCTYPE service_bundle SYSTEM "/usr/share/lib/xml/dtd/service_bundle.dtd.1">
<service_bundle type='manifest' name='NSD'>
<service
  name='network/dns/nsd'
  type='service'
  version='1'>
    <dependency
      name='filesystem_minimal'
      grouping='require_all'
      restart_on='none'
      type='service'>
      <service_fmri value='svc:/system/filesystem/local' />
    </dependency>
    <dependency
      name='loopback'
      grouping='require_any'
      restart_on='error'
      type='service'>
      <service_fmri value='svc:/network/loopback' />
    </dependency>
    <dependency
      name='network'
      grouping='optional_all'
      restart_on='error'
      type='service'>
      <service_fmri value='svc:/milestone/network' />
    </dependency>
    <exec_method
      type='method'
      name='stop'
      exec='/opt/nsd/sbin/nsdc stop'
      timeout_seconds='60' />
    <instance name='default' enabled='false' >
      <exec_method
        type='method'
        name='start'
        exec='/opt/nsd/sbin/nsdc start'
        timeout_seconds='60' >
        <method_context>
          <method_credential
            user='root'
            group='root' />
        </method_context>
      </exec_method>
      <exec_method
        type='method'
        name='refresh'
        exec='/opt/nsd/sbin/nsdc rebuild'
        timeout_seconds='60'>
        <method_context>
        <method_credential user='root' group='root' />
        </method_context>
      </exec_method>
        </instance>
        <stability value='Unstable' />
        <template>
                <common_name>
                        <loctext xml:lang='C'>
                                NSD Authoritative-only DNS server
                        </loctext>
                </common_name>
        </template>
</service>
</service_bundle>

NSD 兼容 BIND 的 Zone 文件格式