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由于权限和连接失败错误而命名失败

tag-icon • tag-icon bind connection named-conf domain-name-system
由于权限和连接失败错误而命名失败

我遇到了一个严重的问题，导致我的服务器瘫痪。

由于某些未知原因，尽管我尽力修复日志中发现的问题，但命名仍不再起作用。

每当我尝试运行重建DNS配置（控制面板）

warn [fixrndc] /usr/sbin/rndc status failed: rndc: connect failed: 127.0.0.1#953: connection refused

当我检查命名的状态时：

root@host [/etc]# /etc/init.d/named status
rndc: connect failed: 127.0.0.1#953: connection refused

这是我的 /var/log/messages 尾部

root@host [/etc]# tail /var/log/messages
Nov 24 22:32:25 host named[21687]: listening on IPv4 interface eth1, 108.xx.18.18#53
Nov 24 22:32:25 host named[21687]: listening on IPv4 interface eth1:cp1, 108.xx.18.19#53
Nov 24 22:32:25 host named[21687]: listening on IPv4 interface eth1:cp2, 108.xx.18.20#53
Nov 24 22:32:25 host named[21687]: listening on IPv4 interface eth1:cp3, 108.xx.18.21#53
Nov 24 22:32:25 host named[21687]: listening on IPv4 interface eth1:cp4, 108.xx.18.22#53
Nov 24 22:32:25 host named[21687]: listening on IPv4 interface eth1:cp5, 108.xx.18.23#53
Nov 24 22:32:25 host named[21687]: command channel listening on 127.0.0.1#953
Nov 24 22:32:25 host named[21687]: couldn't open pid file '/var/run/named/named.pid': Permission denied
Nov 24 22:32:25 host named[21687]: exiting (due to early fatal error)
Nov 24 22:32:25 host /etc/init.d/named: named startup succeeded

我的配置被赋予了以下权限：

root@host [/etc]# ls -lh | grep named.conf
-rw-r--r--  1 named root  4.9K Nov 24 22:11 named.conf

我的named.conf有以下代码:(减去区域）

include "/etc/rndc.key";

controls {
    inet 127.0.0.1 allow { localhost; } keys { "rndc-key"; };
};  

options {
    /* make named use port 53 for the source of all queries, to allow
         * firewalls to block all ports except 53:
         */

    // query-source    port 53;

    recursion no;

    /* We no longer enable this by default as the dns posion exploit
        has forced many providers to open up their firewalls a bit */

    // Put files that named is allowed to write in the data/ directory:
    directory                "/var/named"; // the default
    pid-file                 "/var/run/named/named.pid";
    dump-file                "data/cache_dump.db";
    statistics-file          "data/named_stats.txt";
   /* memstatistics-file     "data/named_mem_stats.txt"; */
    allow-transfer    { "none"; };
};

rndc 上的权限：

root@host [/etc]# ls -lh | grep rndc
-rw-rw----  1 named named  479 Nov 24 21:29 rndc.conf
-rw-rw----  1 named named  479 Nov 24 21:16 rndc.conf.bak
-rw-rw----  1 named named   77 Nov 24 21:29 rndc.key

我的命名文件夹权限：

ls -lh /var/run/named/
total 8.0K
drwxrwxr-x  2 named named 4.0K Jan  7  2013 ./
drwxrwx--- 22 root  root  4.0K Nov 24 22:29 ../

这里有什么突出的东西吗？

感谢您的帮助！

答案1

显然，(a) 基本问题名为无法写入其 pid 文件。想到的可能性有

  1. passwd 文件中指定用户的冲突条目
  2. linux系统

关于如何测试这些理论的建议，请见评论。

由于更改 named.conf 中 pid 文件的位置已经修复了问题，因此 /var/run 下的文件夹权限似乎仍然存在问题。

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