nslookup命令详解和实战例子（全） |
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nslookup命令详解和实战例子
nslookup 主要用来诊断域名系统 (DNS) 基础结构的信息。查询DNS的记录，查询域名解析是否正常，在网络故障时用来诊断网络问题。 1. 查询域名解析地址 nslookup domain dnsserver 例子： nslookup sohu.com #采用默认的DNS服务器查询 nslookup sohu.com 114.114.114.114 # 采用指定的DNS服务器查询 结果如下得到sohu.com的服务器IP为 211.159.191.77 注： 1. 每个DNS服务器查询到的IP可能不相同 2. 可能查询出来的记录会出现多个 3. 对于被污染的域名，查询的结果是不准确的 root@xg:~# nslookup sohu.com Server: 8.8.8.8 Address: 8.8.8.8#53 Non-authoritative answer: Name: sohu.com Address: 211.159.191.77 root@xg:~# nslookup sohu.com 114.114.114.114 Server: 114.114.114.114 Address: 114.114.114.114#53 Non-authoritative answer: Name: sohu.com Address: 211.159.191.772. 查询域名的指定解析类型的解析记录 格式：nslookup -type=type domain [dns-server] 其中 type 为解释类型 type解释AA记录地址记录AAAA地址记录AFSDB文件系统数据库服务器记录ATMAATM地址记录CNAME别名记录ISDN域名对应的ISDN号码MB存放指定邮箱的服务器MG邮件组记录MINFO邮件组和邮箱的信息记录MR改名的邮箱记录MX邮件服务器记录NS名字服务器记录PTR反向记录RP负责人记录RT路由穿透记录SRVTCP服务器信息记录TXT域名对应的文本信息X25域名对应的X.25地址记录实例 root@xg:~# nslookup -type=A qq.com Server: 114.114.114.114 Address: 114.114.114.114#53 Non-authoritative answer: Name: qq.com Address: 61.129.7.47 Name: qq.com Address: 123.151.137.18 Name: qq.com Address: 183.3.226.35 root@xg:~# nslookup -type=MX qq.com Server: 8.8.8.8 Address: 8.8.8.8#53 Non-authoritative answer: qq.com mail exchanger = 10 mx3.qq.com. qq.com mail exchanger = 20 mx2.qq.com. qq.com mail exchanger = 30 mx1.qq.com. Authoritative answers can be found from: root@xg:~# nslookup -type=PTR qq.com Server: 8.8.8.8 Address: 8.8.8.8#53 Non-authoritative answer: *** Can't find qq.com: No answer Authoritative answers can be found from: qq.com origin = ns1.qq.com mail addr = webmaster.qq.com serial = 1330914143 refresh = 3600 retry = 300 expire = 86400 minimum = 300 root@xg:~# nslookup -type=NS qq.com Server: 114.114.114.114 Address: 114.114.114.114#53 Non-authoritative answer: qq.com nameserver = ns4.qq.com. qq.com nameserver = ns2.qq.com. qq.com nameserver = ns1.qq.com. qq.com nameserver = ns3.qq.com. Authoritative answers can be found from: root@xg:~# nslookup -type=TXT qq.com Server: 8.8.8.8 Address: 8.8.8.8#53 Non-authoritative answer: qq.com text = "v=spf1 include:spf.mail.qq.com -all" Authoritative answers can be found from:3. 查询全部 nslookup -query=any qq.com root@xg:~# nslookup -query=any qq.com Server: 114.114.114.114 Address: 114.114.114.114#53 Non-authoritative answer: qq.com mail exchanger = 10 mx3.qq.com. qq.com mail exchanger = 20 mx2.qq.com. qq.com mail exchanger = 30 mx1.qq.com. Name: qq.com Address: 183.3.226.35 Name: qq.com Address: 123.151.137.18 Name: qq.com Address: 61.129.7.47 qq.com nameserver = ns2.qq.com. qq.com nameserver = ns4.qq.com. qq.com nameserver = ns1.qq.com. qq.com nameserver = ns3.qq.com. Authoritative answers can be found from:
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