redhat as 4 版本的DNS设置需要修改几个文件。/etc/resolv.conf          本机dns配置文件/etc/named.conf         dns主配置文件/var/named/chroot/var/named/sdyc.edu.cn.zone       正向区域文件sdyc.edu.cn.zone,系统缺省没有，需要自己添加/var/named/chroot/var/named /sdyu.edu.cn.zone        正向区域文件sdyu.edu.cn.zone,系统缺省没有，需要自己添加/var/named/chroot/var/named /76.194.222.fanxiang.zone 反向区域文件76.194.222.sdyc.edu.cn.zone,系统缺省没有，需要自己添加   [root@dns1 ~]# vi /etc/resolv.confsearch sdyc.edu.cnnameserver 222.194.76.2nameserver 202.102.152.3[root@dns1 ~]# vi /etc/named.conf//// named.conf for Red Hat caching-nameserver// options {          directory "/var/named";          dump-file "/var/named/data/cache_dump.db";          statistics-file "/var/named/data/named_stats.txt";/*           * If there is a firewall between you and nameservers you want           * to talk to, you might need to uncomment the query-source           * directive below.     Previous versions of BIND always asked           * questions using port 53, but BIND 8.1 uses an unprivileged           * port by default.           */           // query-source address * port 53;}; //// a caching only nameserver config//controls {          inet 127.0.0.1 allow { localhost; } keys { rndckey; };}; zone "." IN {          type hint;          file "named.ca";}; zone "localdomain" IN {          type master;          file "localdomain.zone";           allow-update { none; };}; zone "localhost" IN {          type master;          file "localhost.zone";          allow-update { none; };}; zone "sdyc.edu.cn" IN {          type master;          file "sdyc.edu.cn.zone";          allow-update { none; };};zone "sdyu.edu.cn" IN {          type master;          file "sdyu.edu.cn.zone";           allow-update { none; };};zone "76.194.222.in-addr.arpa" IN {           type master;          file "76.194.222.fanxiang.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; };}; include "/etc/rndc.key";[root@dns1 ~]# vi /var/named/chroot/var/named/sdyc.edu.cn.zone$TTL       86400@                 IN SOA    sdyc.edu.cn. root.sdyc.edu.cn. (                                          42                ; serial (d. adams)                                          3H                ; refresh                                          15M               ; retry                                          1W                ; expiry                                          1D )              ; minimum                  IN NS        dns1.sdyu.edu.cn.                   IN MX 10     mail.sdyc.edu.cn.www       IN       A                   222.194.76.36mail      IN       A                  222.194.76.35dns1      IN       A                  222.194.76.2ids       IN        A                  222.194.76.12jpkc      IN       A                   222.194.76.59jw        IN       A                  222.194.76.22my        IN       A                  222.194.76.18oa        IN        A                  222.194.76.20xg        IN       A                   222.194.76.18[root@dns1 ~]# vi /var/named/chroot/var/named/sdyu.edu.cn.zone$TTL       86400@                 IN SOA    sdyu.edu.cn. root.sdyu.edu.cn. (                                          42                ; serial (d. adams)                                          3H                ; refresh                                          15M               ; retry                                          1W                ; expiry                                          1D )              ; minimum                  IN NS     dns1.sdyu.edu.cn.                    IN MX 10     mail.sdyu.edu.cn.www       IN       A                   222.194.76.36mail      IN       A                  222.194.76.35dns1      IN       A                  222.194.76.2ids       IN        A                  222.194.76.12jpkc      IN       A                   222.194.76.59jw        IN       A                  222.194.76.22my        IN       A                  222.194.76.18oa        IN        A                  222.194.76.20xg        IN       A                   222.194.76.18 [root@dns1 ~]# vi /var/named/chroot/var/named/76.194.222.fanxiang.zone $TTL 86400
@        IN       SOA      sdyu.edu.cn. root.sdyu.edu.cn.  (
                                       1997022700 ; Serial
                                       28800       ; Refresh
                                       14400       ; Retry
                                       3600000     ; Expire
                                       86400 )     ; Minimum
                 
                 IN NS       dns1.sdyu.edu.cn.
                 IN MX 10    mail.sdyu.edu.cn.
36        IN       PTR      www.sdyu.edu.cn.
21        IN       PTR      mail.sdyu.edu.cn.
2         IN       PTR      dns1.sdyu.edu.cn.
12        IN       PTR      ids.sdyu.edu.cn.
59        IN       PTR      jpkc.sdyu.edu.cn.
22        IN       PTR      jw.sdyu.edu.cn.
18        IN       PTR      my.sdyu.edu.cn.
20        IN       PTR      oa.sdyu.edu.cn.
18        IN       PTR      xg.sdyu.edu.cn.
35        IN       PTR      mail.sdyc.edu.cn.