네임서버가.......

#named.conf
## named.conf - configuration for bind
#
# Generated automatically by redhat-config-bind, alchemist et al.
# Any changes not supported by redhat-config-bind should be put
# in /etc/named.custom
#
controls {
inet 127.0.0.1 allow { localhost; } keys { rndckey; };
};

include "/etc/named.custom";

include "/etc/rndc.key";

options {
directory "/var/named/";
};

zone "0.0.127.in-addr.arpa" {
type master;
file "0.0.127.in-addr.arpa.zone";
allow-update { none; };
};

zone "8.148.218.in-addr.arpa" {
type master;
file "linuxschool.rev";
allow-update { none; };
};

zone "localhost" {
type master;
file "localhost.zone";
allow-update { none; };
};

zone "linuxschool.org" {
type master;
file "linuxschool.zone";
allow-update { none; };
};

#linuxschool.zone
$TTL 86400
@ IN SOA ns.linuxschool.org. root.llinuxschool.org. (
5 ; serial
10800 ; refresh
3600 ; retry
432000 ; expire
86400 ; ttl
)

@ IN NS ns.linuxschool.org.
@ IN A 218.148.8.141
@ IN MX 10 root.linuxschool.org.
ns IN A 218.148.8.141

@ IN A 218.148.8.141
www IN A 218.148.8.141
ftp IN A 218.148.8.141

mail IN CNAME @

#linuxschool.rev
$TTL 86400
@ IN SOA ns.linuxschool.org. root.llinuxschool.org. (
5 ; serial
18800 ; refresh
3600 ; retry
432000 ; expire
86400 ; ttl
)

@ IN NS ns.linuxschool.org.
@ IN MX 10 root.linuxschool.org.

141 IN PTR linuxschool.org.
141 IN PTR www.linuxschool.org.
141 IN PTR ftp.linuxschool.org.

이렇게 되어 잇는데요
nslookup 해서 보면 로컬에서는 아이피 맵핑두 제대루 뜨구 웹페이지두 뜨고
ftp 접속 다되는데 외부에서 전혀 반응이 없습니다.
외부에서는 ns.linuxschool.org 이렇게 하면 이것만 아이피 맵핑 되구 다른거
는 전혀 반응이 없습니다. 제가 멀 잘못 한건지..;; 도외주세여