求助：DNS内部查询OK，外部无法查询！

jxgen0791

平台：Redhat 4
bind版本：9.2x
自己架设了Master、slave两台DNS服务器192.168.1.25(ip映射为110.37.19.4)、192.168.1.26（IP映射为110.37.19.5)，并通过了CNNIC合法授权。通过内部网查询该DNS服务器，均能成功查询到所有Zone记录信息。但通过外部网查询，却只能查询到该Master的反向记录，其他记录均显示如下：
> test.bao.cn
Server:         192.168.1.26
Address:        192.168.1.26#53

** server can't find test.bao.cn: NXDOMAIN
> 110.37.19.5
Server:         192.168.1.26
Address:        192.168.1.26#53

** server can't find 5.19.37.110.in-addr.arpa: SERVFAIL
>
通过CNNIC合法授权记录：
DNS Diagnostics
Data collection finished, cross referencing results

(info) SOA record returned by 110.37.19.4 is 8120207
(info) SOA record returned by 110.37.19.5 is 8120207
(good) No mismatches in SOA records were found.
(good) No mismatches in NS records were found.

请各位大侠指教！谢谢！