Summery
DNSサーバに名前解決の問い合わせを行う。
正引き／逆引き、Aレコード／NSレコード／MXレコードなどのレコード種類の絞込み検索
再帰検索／イテレイティブ検索、DNSサーバの任意切り替え
デバッグの実行
引数をなくせば対話モードで実行される。
Construction
$nslookup [option] [Domain or IP]
Option
-v : host情報のみを表示
-n : サービス情報のみを表示
-N : 全てのレコード情報を表示
Sample
## ドメインのDNS情報の取得
$ nslookup google.com
Server: 192.168.1.10
Address: 192.168.1.10#53
Non-authoritative answer:
Name: google.com
Address: 210.143.147.52
Name: google.com
Address: 210.143.147.24
Name: google.com
Address: 210.143.147.38
Name: google.com
Address: 210.143.147.18
Name: google.com
Address: 210.143.147.46
Name: google.com
Address: 210.143.147.31
Name: google.com
Address: 210.143.147.39
Name: google.com
Address: 210.143.147.59
Name: google.com
Address: 210.143.147.25
Name: google.com
Address: 210.143.147.53
Name: google.com
Address: 210.143.147.32
Name: google.com
Address: 210.143.147.45
Discription
NSLOOKUP(1) BIND9 NSLOOKUP(1)
NAME
nslookup - query Internet name servers interactively
SYNOPSIS
nslookup [-option] [name | -] [server]
DESCRIPTION
Nslookup is a program to query Internet domain name servers. Nslookup has two
modes: interactive and non-interactive. Interactive mode allows the user to
query name servers for information about various hosts and domains or to print
a list of hosts in a domain. Non-interactive mode is used to print just the
name and requested information for a host or domain.
ARGUMENTS
Interactive mode is entered in the following cases:
1. when no arguments are given (the default name server will be used)
2. when the first argument is a hyphen (-) and the second argument is the host
name or Internet address of a name server.
Non-interactive mode is used when the name or Internet address of the host to be
looked up is given as the first argument. The optional second argument specifies the
host name or address of a name server.
Options can also be specified on the command line if they precede the arguments and
are prefixed with a hyphen. For example, to change the default query type to host
information, and the initial timeout to 10 seconds, type:
nslookup -query=hinfo -timeout=10
Mac OS X NOTICE
The nslookup command does not use the host name and address resolution or the
DNS query routing mechanisms used by other processes running on Mac OS X. The
results of name or address queries printed by nslookup may differ from those
found by other processes that use the Mac OS X native name and address
resolution mechanisms. The results of DNS queries may also differ from queries
that use the Mac OS X DNS routing library.
INTERACTIVE COMMANDS
host [server]
Look up information for host using the current default server or using
server, if specified. If host is an Internet address and the query type is
A or PTR, the name of the host is returned. If host is a name and does not
have a trailing period, the search list is used to qualify the name.
To look up a host not in the current domain, append a period to the name.
server domain
lserver domain
Change the default server to domain; lserver uses the initial server to
look up information about domain, while server uses the current default
server. If an authoritative answer can't be found, the names of servers
that might have the answer are returned.
root
not implemented
finger
not implemented
ls
not implemented
view
not implemented
help
not implemented
?
not implemented
exit
Exits the program.
set keyword[=value]
This command is used to change state information that affects the lookups.
Valid keywords are:
all
Prints the current values of the frequently used options to set.
Information about the current default server and host is also
printed.
class=value
Change the query class to one of:
IN
the Internet class
CH
the Chaos class
HS
the Hesiod class
ANY
wildcard
The class specifies the protocol group of the information.
(Default = IN; abbreviation = cl)
[no]debug
Turn on or off the display of the full response packet and any
intermediate response packets when searching.
(Default = nodebug; abbreviation = [no]deb)
[no]d2
Turn debugging mode on or off. This displays more about what
nslookup is doing.
(Default = nod2)
domain=name
Sets the search list to name.
[no]search
If the lookup request contains at least one period but doesn't end
with a trailing period, append the domain names in the domain
search list to the request until an answer is received.
(Default = search)
port=value
Change the default TCP/UDP name server port to value.
(Default = 53; abbreviation = po)
querytype=value
type=value
Change the type of the information query.
(Default = A; abbreviations = q, ty)
[no]recurse
Tell the name server to query other servers if it does not have the
information.
(Default = recurse; abbreviation = [no]rec)
retry=number
Set the number of retries to number.
timeout=number
Change the initial timeout interval for waiting for a reply to
number seconds.
[no]vc
Always use a virtual circuit when sending requests to the server.
(Default = novc)
[no]fail
Try the next nameserver if a nameserver responds with SERVFAIL or a
referral (nofail) or terminate query (fail) on such a response.
(Default = nofail)
FILES
/etc/resolv.conf
SEE ALSO
dig(1), host(1), named(8).
AUTHOR
Andrew Cherenson
COPYRIGHT
Copyright (C) 2004-2007, 2010 Internet Systems Consortium, Inc. ("ISC")
BIND9 Jun 30, 2000 NSLOOKUP(1)
