ネットニュースの情報源をいくつか紹介する。さらに、情報源を運営し ている管理者についての情報を調べるネットワークのユーティリティとその 使い方を示す。
情報源を運営している管理者を知ることで、情報源への信頼度を確認す ることができる。
愛媛新聞は、その日の朝刊紙面を読むことができるサービスを提供して いる。
インターネットのコンピュータ名とそれに割り振られたIPアドレスの対 応を知ることができる。
$ nslookup
> www.matsuyama-u.ac.jp
Server:127.0.1.1
Address:127.0.1.1#53
Non-authoritative answer:
Name:www.matsuyama-u.ac.jp
Address: 114.179.15.166
Name:www.matsuyama-u.ac.jp
Address: 210.230.212.182
WHOIS サーバへ、RFC 3912 にもとづき提供されるデータベースへの問合 せを実行する。
$ whois 114.179.15.166
% [whois.apnic.net]
% Whois data copyright terms
http://www.apnic.net/db/dbcopyright.html
% Information related to '114.160.0.0 - 114.191.255.255'
inetnum: 114.160.0.0 - 114.191.255.255
netname: OCN
descr: NTT Communications Corporation
descr: 1-6 Uchisaiwai-cho 1-chome Chiyoda-ku, Tokyo
100-8019 Japan
country: JP
admin-c: JNIC1-AP
tech-c: JNIC1-AP
status: ALLOCATED PORTABLE
remarks: Email address for spam or abuse complaints
abuse@ocn.ad.jp
changed: hm-changed@apnic.net 20080612
changed: hm-changed@apnic.net 20151202
mnt-by: MAINT-JPNIC
mnt-irt: IRT-JPNIC-JP
mnt-lower: MAINT-JPNIC
source: APNIC
irt: IRT-JPNIC-JP
address: Urbannet-Kanda Bldg 4F, 3-6-2 Uchi-Kanda
address: Chiyoda-ku, Tokyo 101-0047, Japan
e-mail: hostmaster@nic.ad.jp
abuse-mailbox: hostmaster@nic.ad.jp
admin-c: JNIC1-AP
tech-c: JNIC1-AP
auth: # Filtered
mnt-by: MAINT-JPNIC
changed: abuse@apnic.net 20101108
changed: hm-changed@apnic.net 20101111
changed: ip-apnic@nic.ad.jp 20140702
source: APNIC
role: Japan Network Information Center
address: Urbannet-Kanda Bldg 4F
address: 3-6-2 Uchi-Kanda
address: Chiyoda-ku, Tokyo 101-0047,Japan
country: JP
phone: +81-3-5297-2311
fax-no: +81-3-5297-2312
e-mail: hostmaster@nic.ad.jp
admin-c: JI13-AP
tech-c: JE53-AP
nic-hdl: JNIC1-AP
mnt-by: MAINT-JPNIC
changed: hm-changed@apnic.net 20041222
changed: hm-changed@apnic.net 20050324
changed: ip-apnic@nic.ad.jp 20051027
changed: ip-apnic@nic.ad.jp 20120828
source: APNIC
% Information related to '114.179.15.160 - 114.179.15.175'
inetnum: 114.179.15.160 - 114.179.15.175
netname: INF-GOV03B
descr: Information Network Fukushima CO.,LTD.
country: JP
admin-c: MH10769JP
tech-c: MH10769JP
remarks: This information has been partially mirrored by
APNIC from
remarks: JPNIC. To obtain more specific information, please
use the
remarks: JPNIC WHOIS Gateway at
remarks: http://www.nic.ad.jp/en/db/whois/en-gateway.html
or
remarks: whois.nic.ad.jp for WHOIS client. (The WHOIS
client
remarks: defaults to Japanese output, use the /e switch for
English
remarks: output)
changed: apnic-ftp@nic.ad.jp 20140205
source: JPNIC
% This query was served by the APNIC Whois Service version
1.69.1-APNICv1r0 (UNDEFINED)
$ whois 210.230.212.182
[ JPNIC database provides information regarding IP address and ASN. Its use ]
[ is restricted to network administration purposes. For further information, ]
[ use 'whois -h whois.nic.ad.jp help'. To only display English output, ]
[ add '/e' at the end of command, e.g. 'whois -h whois.nic.ad.jp xxx/e'. ]
Network Information:
a. [Network Number] 210.230.212.176/28
b. [Network Name] INF-GOV03-02
g. [Organization] Information Network Fukushima CO.,LTD.
m. [Administrative Contact] MH10769JP
n. [Technical Contact] MH10769JP
p. [Nameserver]
[Assigned Date] 2014/01/29
[Return Date]
[Last Update] 2014/01/29 13:35:03(JST)
Less Specific Info.
----------
KDDI CORPORATION
[Allocation] 210.230.128.0/17
DION (KDDI CORPORATION)
SUBA-161-SEN [Sub Allocation] 210.230.212.0/24
More Specific Info.
----------
No match!!