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我有以下设置：我在 ubuntu 服务器上安装了 5 个 bind9 服务器，一个主服务器，另外 4 个从服务器。问题是，当我突然更新一个区域并运行 rndc reload 时，只有 2 个从属服务器会收到通知，而另外 2 个工作正常。当我试图解决这个问题时，我使用 tcpdump 检查来自主机的数据包是否到达从机，并注意到主机只向正在工作的 2 个从机发送通知，我无法解释为什么会发生这种情况。服务器的配置文件如下所示：

/etc/bind/named.conf

include "/etc/bind/named.conf.options";
include "/etc/bind/named.conf.local";
include "/etc/bind/named.conf.default-zones";
include "/etc/bind/named.conf.log";
include "/etc/bind/named.acl";

/etc/bind/named.acl

acl slaves {<slave-ip-1>; <slave-ip-2>; <slave-ip-3>; <slave-ip-4>; };

/etc/bind/named.conf.local

zone "<zone>" IN {
    type master;
    file "/var/lib/bind/named.<zone>";
    masterfile-format text;
};

/etc/bind/named.conf.options

options {
    directory "/var/cache/bind";
    dnssec-validation auto;

    allow-transfer { slaves; };
}

/etc/bind/named.conf.log

logging {

    channel "query" {
        file "/var/log/bind/query.log" versions 4 size 4m;
        print-time YES;
        print-severity YES;
        print-category YES;
};

    channel "general" {
        file "/var/log/bind/general.log" versions 4 size 4m;
        print-time YES;
        print-severity YES;
        severity info;
    };
 
    category default {
       "query";
    };

    category general {
        "general";
   };

};

从站的配置文件如下所示：

/etc/bind/named.conf.local

zone "<zone>" IN {
    type slave;
    file "/var/lib/bind/named.<zone>";
    masterfile-format text;
    masters {<ip of the master>; };
};

/etc/bind/named.conf.options

options {
    directory "/var/cache/bind";

    allow-uery { any; };
}

如果有人能帮我解决这个问题，我会永远优雅。

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