小弟目前在玩CentOS 5時碰上了一些問題,如下:
因為一時興起,所以試著玩CentOS 5 ,想要建立DNS Server時碰上了一點困難,我裝了以下這些套件
ypbind-1.19-7.el5
system-config-bind-4.0.3-2.el5.centos
bind-9.3.3-9.0.1.el5
bind-chroot-9.3.3-9.0.1.el5
bind-libs-9.3.3-9.0.1.el5
bind-utils-9.3.3-9.0.1.el5
主要的設定檔都在:/var/named/chroot/ 的裡面,共有dev/ etc/ proc/ var/等子目錄。
而etc/的目錄裡的檔案共有:
localtime .named.conf.swp named.root.hints rndc.key
named.conf named.rfc1912.zones rndc.conf
var/的子目錄又分別有以下幾個子目錄:named/ run/ tmp/
named/子目錄裡的檔案有:data/ my.external.zone.db named.root
localdomain.zone my.internal.zone.db named.ip6.local named.zero
localhost.zone named.broadcast named.local slaves/
/var/named/chroot/etc/named.conf主要的設定內容如下:
//
// Sample named.conf BIND DNS server 'named' configuration file
// for the Red Hat BIND distribution.
//
// See the BIND Administrator's Reference Manual (ARM) for details, in:
// file:///usr/share/doc/bind-*/arm/Bv9ARM.html
// Also see the BIND Configuration GUI : /usr/bin/system-config-bind and
// its manual.
//
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;
query-source-v6 port 53;
// Put files that named is allowed to write in the data/ directory:
directory "/var/named"; // the default
dump-file "data/cache_dump.db";
statistics-file "data/named_stats.txt";
memstatistics-file "data/named_mem_stats.txt";
};
logging
{
/* If you want to enable debugging, eg. using the 'rndc trace' command,
* named will try to write the 'named.run' file in the $directory (/var/named).
* By default, SELinux policy does not allow named to modify the /var/named directory,
* so put the default debug log file in data/ :
*/
channel default_debug {
file "data/named.run";
severity dynamic;
};
};
//
// All BIND 9 zones are in a "view", which allow different zones to be served
// to different types of client addresses, and for options to be set for groups
// of zones.
//
// By default, if named.conf contains no "view" clauses, all zones are in the
// "default" view, which matches all clients.
//
// If named.conf contains any "view" clause, then all zones MUST be in a view;
// so it is recommended to start off using views to avoid having to restructure
// your configuration files in the future.
//
view "localhost_resolver"
{
/* This view sets up named to be a localhost resolver ( caching only nameserver ).
* If all you want is a caching-only nameserver, then you need only define this view:
*/
match-clients { localhost; };
match-destinations { localhost; };
recursion yes;
# all views must contain the root hints zone:
include "/etc/named.root.hints";
/* these are zones that contain definitions for all the localhost
* names and addresses, as recommended in RFC1912 - these names should
* ONLY be served to localhost clients:
*/
include "/etc/named.rfc1912.zones";
};
view "internal"
{
/* This view will contain zones you want to serve only to "internal" clients
that connect via your directly attached LAN interfaces - "localnets" .
*/
match-clients { localnets; };
match-destinations { localnets; };
recursion yes;
// all views must contain the root hints zone:
include "/etc/named.root.hints";
// include "named.rfc1912.zones";
// you should not serve your rfc1912 names to non-localhost clients.
// These are your "authoritative" internal zones, and would probably
// also be included in the "localhost_resolver" view above :
zone "my.internal.zone" {
type master;
file "my.internal.zone.db";
};
zone "my.slave.internal.zone" {
type slave;
file "slaves/my.slave.internal.zone.db";
masters { /* put master nameserver IPs here */ 127.0.0.1; } ;
// put slave zones in the slaves/ directory so named can update them
};
zone "my.ddns.internal.zone" {
type master;
allow-update { key ddns_key; };
file "slaves/my.ddns.internal.zone.db";
// put dynamically updateable zones in the slaves/ directory so named can update them
};
};
key ddns_key
{
algorithm hmac-md5;
secret "use /usr/sbin/dns-keygen to generate TSIG keys";
};
view "external"
{
/* This view will contain zones you want to serve only to "external" clients
* that have addresses that are not on your directly attached LAN interface subnets:
*/
match-clients { !localnets; !localhost; };
match-destinations { !localnets; !localhost; };
recursion no;
// you'd probably want to deny recursion to external clients, so you don't
// end up providing free DNS service to all takers
// all views must contain the root hints zone:
include "/etc/named.root.hints";
// These are your "authoritative" external zones, and would probably
// contain entries for just your web and mail servers:
zone "my.external.zone" {
type master;
file "my.external.zone.db";
};
};
named.rfc1912.zones的設定內容如下:
// named.rfc1912.zones:
//
// ISC BIND named zone configuration for zones recommended by
// RFC 1912 section 4.1 : localhost TLDs and address zones
//
zone "localdomain" IN {
type master;
file "localdomain.zone";
allow-update { none; };
};
zone "localhost" IN {
type master;
file "localhost.zone";
allow-update { none; };
};
zone "0.0.127.in-addr.arpa" IN {
type master;
file "named.local";
allow-update { none; };
};
zone "0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa" IN {
type master;
file "named.ip6.local";
allow-update { none; };
};
zone "255.in-addr.arpa" IN {
type master;
file "named.broadcast";
allow-update { none; };
};
zone "0.in-addr.arpa" IN {
type master;
file "named.zero";
allow-update { none; };
};
named.root.hints的設定內容如下:
//
// The 'named.root' root cache hints zone for the bind DNS 'named' nameserver.
//
// named's cache must be primed with the addresses of the root zone '.' nameservers.
// The root zone file can be obtained by querying the root 'A' nameserver:
// $ dig . ns @198.41.0.4 > named.root
// Or by download via FTP / HTTP:
// $ wget ftp://ftp.rs.internic.net/domain/named.root
//
// Every view that is to provide recursive service must include this zone.
//
zone "." IN {
type hint;
file "named.root";
};
啟動時的訊息:
[root@localhost /]# /etc/init.d/named restart
正在停止 named: [失敗]
正在啟動 named: [失敗]
[root@localhost /]#
LOG檔裡面沒有錯誤訊息!
以上全都是預設的值,為什麼會啟動不了呢?我已經反覆的看過好幾次的相關設定,就是找不出原因!.....希望有玩過這個版本的大大可以幫小弟解惑一下,感激不盡.......謝謝。
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