《NetBSD指南-25.4.1.测试服务器》

[leo]

Now that the server is running we can test it using the nslookup(8) program:

代码: 全选

$ nslookup
Default server: localhost
Address: 127.0.0.1

>
Let's try to resolve a host name, for example "www.NetBSD.org":

代码: 全选

> www.NetBSD.org
Server:  localhost
Address:  127.0.0.1

Name:    www.NetBSD.org
Address:  204.152.190.12

If you repeat the query a second time, the result is slightly different:

代码: 全选

> www.NetBSD.org
Server:  localhost
Address:  127.0.0.1

Non-authoritative answer:
Name:    www.NetBSD.org
Address:  204.152.190.12

As you've probably noticed, the address is the same, but the message “Non-authoritative answer” has appeared. This message indicates that the answer is not coming from an authoritative server for the domain NetBSD.org but from the cache of our own server.

The results of this first test confirm that the server is working correctly.

We can also try the host(1) and dig(1) commands, which give the following result.

代码: 全选

$ host www.NetBSD.org
www.NetBSD.org has address 204.152.190.12
$
$ dig www.NetBSD.org

; <<>> DiG 8.3 <<>> www.NetBSD.org
;; res options: init recurs defnam dnsrch
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 19409
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 5, ADDITIONAL: 0
;; QUERY SECTION:
;;      www.NetBSD.org, type = A, class = IN

;; ANSWER SECTION:
www.NetBSD.org.         23h32m54s IN A  204.152.190.12

;; AUTHORITY SECTION:
NetBSD.org.             23h32m54s IN NS  uucp-gw-1.pa.dec.com.
NetBSD.org.             23h32m54s IN NS  uucp-gw-2.pa.dec.com.
NetBSD.org.             23h32m54s IN NS  ns.NetBSD.org.
NetBSD.org.             23h32m54s IN NS  adns1.berkeley.edu.
NetBSD.org.             23h32m54s IN NS  adns2.berkeley.edu.

;; Total query time: 14 msec
;; FROM: miyu to SERVER: 127.0.0.1
;; WHEN: Thu Nov 25 22:59:36 2004
;; MSG SIZE  sent: 32  rcvd: 175 

As you can see dig(1) gives quite a bit of output, the expected answer can be found in the "ANSWER SECTION". The other data given may be of interest when debugging DNS problems.