dns问题，可以nslookup，就是ping不通

TangJohn

配制好以后运行nslookup ，能够解析本地和外网域名，可是就是ping不通
配制文件如下：
文件 /etc/host.conf
[code:1][root@linux7 named]# cat /etc/host.conf
order hosts,bind[/code:1]

文件 /etc/resolve.conf
[code:1]domain my.com
search  my.com
nameserver 172.18.6.62[/code:1]

文件 /etc/named.conf
[code:1][root@linux7 named]# cat /etc/named.conf
// generated by named-bootconf.pl

options {
        directory "/var/named";
        /*
         * 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;
        auth-nxdomain yes;
};

//
// a caching only nameserver config
//

controls {
        inet 127.0.0.1 allow { localhost; } keys { rndckey; };
};

zone "." IN {
        type hint;
        file "named.ca";
};

zone "my.com" IN {
        type master;
        file "db.my";
        allow-update { none; };
};

zone "6.18.172.in-addr.arpa" {
        type master;
        file "db.172.18.6";
};

include "/etc/rndc.key";[/code:1]

文件 /var/named/db.my
[code:1]
[root@linux7 named]# cat /var/named/db.my
@      IN      SOA     my.com. root.my.com.(
           2004070801      ; Serial
            7200            ; Refresh - 2 hours
            3600            ; Retry - 1 hour
            43200           ; Expire - 12 hours
           3600 )          ; Minimum - 1 hour
             IN      NS      my.com.
www     IN      CNAME   www.my.com.
www.my.com    IN      A       172.18.6.62[/code:1]

TangJohn

nslookup 的结果：
[code:1]
[root@linux7 named]# nslookup -sil
> www.my.com
Server:         172.18.6.62
Address:        172.18.6.62#53

www.my.com      canonical name = www.my.com.
> 172.18.6.62
Server:         172.18.6.62
Address:        172.18.6.62#53

62.6.18.172.in-addr.arpa        name = www.my.com.
> [/code:1]