サーバーのよく使うコマンドメモ| nslookup

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)