Linux环境下Bind9 DNS服务器配置报错及名称解析失败问题求助

各位前辈好，我最近在Linux环境里搭建DHCP+DNS服务，用的是isc-dhcp-server和bind9，但遇到了DNS解析失败的问题，还有bind9启动时的报错，想请大家帮忙排查一下。

我的网络环境 #

• 拓扑结构：Internet <--enp0s3接口--> Ubuntu路由器 <--enp0s8接口--> 内部网络设备
• 路由器（Ubuntu系统）的enp0s8接口IP：192.168.1.1
• 内网Ubuntu服务器IP：192.168.1.2
• 目前DHCP服务正常，内网机器之间可以互相ping通，但DNS解析失败。

遇到的问题 #

1. 名称解析失败：当我执行ping server时，返回错误：

ping: server: Temporary failure in name resolution

2. Bind9服务状态报错：执行sudo systemctl status bind9.service，输出里有一堆IPv6相关的“network unreachable”错误，具体如下：

$ sudo systemctl status bind9.service

● named.service - BIND Domain Name Server
Loaded: loaded (/lib/systemd/system/named.service; enabled; vendor preset: enabled)
Active: active (running) since Tue 2024-02-20 11:10:08 UTC; 6min ago
Docs: man:named(8)
Process: 2759 ExecStart=/usr/sbin/named $OPTIONS (code=exited, status=0/SUCCESS)
Main PID: 2760 (named)
Tasks: 5 (limit: 2221)
Memory: 5.6M
CPU: 141ms
CGroup: /system.slice/named.service
└─2760 /usr/sbin/named -u bind

Feb 20 11:10:08 fox-router named[2760]: network unreachable resolving './NS/IN': 2001:500:a8::e#53
Feb 20 11:10:08 fox-router named[2760]: network unreachable resolving './NS/IN': 2001:500:12::d0d#53
Feb 20 11:10:08 fox-router named[2760]: network unreachable resolving './NS/IN': 2001:500:9f::42#53
Feb 20 11:10:08 fox-router named[2760]: network unreachable resolving './NS/IN': 2801:1b8:10::b#53
Feb 20 11:10:08 fox-router named[2760]: network unreachable resolving './NS/IN': 2001:500:2f::f#53
Feb 20 11:10:08 fox-router named[2760]: network unreachable resolving './NS/IN': 2001:500:2::c#53
Feb 20 11:10:08 fox-router named[2760]: network unreachable resolving './NS/IN': 2001:7fe::53#53
Feb 20 11:10:08 fox-router named[2760]: network unreachable resolving './NS/IN': 2001:503:ba3e::2:30#53
Feb 20 11:10:08 fox-router named[2760]: managed-keys-zone: Key 20326 for zone . is now trusted (acceptance timer complete)
Feb 20 11:10:08 fox-router named[2760]: resolver priming query complete: success

我的配置步骤 #

一、路由器（Ubuntu系统）的基础配置 #

我把这台Ubuntu配置成了路由器，先设置了网卡IP：
编辑/etc/netplan/00-installey-config.yaml：

network:
  ethernets:
    enp0s3:
      dhcp4: true
    enp0s8:
      dhcpd4: true
      addresses: [192.168.1.1/24]
  version: 2

然后执行：

sudo netplan apply

二、DHCP服务器（isc-dhcp-server）配置 #

1. 安装服务：

sudo apt install isc-dhcp-server

2. 编辑/etc/dhcp/dhcpd.conf：

default-lease-time 600;
max-lease-time 7200;
ddns-update-style none;

subnet 192.168.1.0 netmask 255.255.255.0{
  range 192.168.1.2 192.168.1.10;
  option routers 192.168.1.1;
  option domain-name-servers 8.8.8.8, 8.8.4.4;
}

host Server{
  hardware ethernet: <MAC address>
  fixed-address: <IP Address>
}

3. 指定DHCP服务绑定的接口：
   编辑/etc/default/isc-dhcp-server：

INTERFACESv4="enp0s8"

4. 重启服务：

sudo systemctl start isc-dhcp-server
sudo systemctl status isc-dhcp-server
sudo systemctl restart isc-dhcp-server

三、DNS服务器（bind9）配置 #

1. 安装服务：

sudo apt-get install bind9

2. 编辑/etc/bind/named.conf.options，添加转发器：

forwarders {
  8.8.8.8;
  8.8.4.4;
};

3. 编辑/etc/bind/named.conf.local配置区域：

zone "foxnetwork.net" {
  type master;
  file "/etc/bind/db.foxnetwork.net";
};

zone "0.168.192.in-addr.arpa" {
  type master;
  file "/etc/bind/db.168";
};

4. 创建正向区域文件/etc/bind/db.foxnetwork.net：

;
; BIND data file for local loopback interface
;
$TTL    604800
@       IN      SOA     ns.foxnetwork.net. root.localhost. (
                              2         ; Serial
                         604800         ; Refresh
                          86400         ; Retry
                        2419200         ; Expire
                         604800 )       ; Negative Cache TTL
;
@       IN      NS      ns.foxnetwork.net.
foxnetwork.net. IN      MX      10      mail.foxnetwork.net.
ns      IN      A       192.168.1.1
web     IN      A       192.168.1.2

5. 创建反向区域文件/etc/bind/db.168：

;
; BIND reverse data file for local loopback interface
;
$TTL    604800
@       IN      SOA     ns.foxnetwork.net root.localhost. (
                              1         ; Serial
                         604800         ; Refresh
                          86400         ; Retry
                        2419200         ; Expire
                         604800 )       ; Negative Cache TTL
;
@       IN      NS      ns.
1       IN      PTR     ns.foxnetwork.net.
2       IN      PTR     web.foxnetwork.net.

6. 重启bind9和DHCP服务：

sudo systemctl restart bind9
sudo systemctl restart isc-dhcp-server

现在的问题是，我还是没法用ping ns访问路由器，也没法用ping server访问内网服务器，麻烦大家帮我看看哪里配置错了？

备注：内容来源于stack exchange，提问作者mitas1c