Bind 9.10のGeoIP機能を使って、リクエスト元に近いサーバのIPを返す ref: http://qiita.com/dseg/items/db3b66f824cfcb12f065

file0.txt

$ httping -c 3 qiita.com
PING qiita.com:80 (/):
connected to 54.248.127.202:80 (386 bytes), seq=0 time=579.29 ms
connected to 54.248.127.202:80 (386 bytes), seq=1 time=530.49 ms
connected to 54.248.127.202:80 (386 bytes), seq=2 time=533.82 ms
--- http://qiita.com/ ping statistics ---
3 connects, 3 ok, 0.00% failed, time 4645ms
round-trip min/avg/max = 530.5/547.9/579.3 ms

file1.txt

$ named -V | sed -r 's/ +/\n/g'|grep geoip
'--with-geoip=/usr'
# OK

file2.txt

$ named -V | sed -r 's/ +/\n/g'|grep geoip
'--with-geoip=/usr'
# OK

file3.txt

# $ sudo apt-get install geoip-database
or
$ sudo apt-get install geoip-database-contrib

file4.txt

geoip [db database] field value

# examples
geoip country US;
geoip country JAP;
geoip db country country Canada;
geoip db region region WA;
geoip city "San Francisco";
geoip region Oklahoma;
geoip postal 95062;
geoip tz "America/Los_Angeles";
geoip org "Internet Systems Consortium";

file5.txt

geoip [db database] field value

# examples
geoip country US;
geoip country JAP;
geoip db country country Canada;
geoip db region region WA;
geoip city "San Francisco";
geoip region Oklahoma;
geoip postal 95062;
geoip tz "America/Los_Angeles";
geoip org "Internet Systems Consortium";

file7.txt

$ nslookup examples.com 1.2.3.4 

file8.txt

$ nslookup examples.com 1.2.3.4 

named.conf.default-zones

view "jp" {
 match-clients { jp; };
 zone "example.com" {
  type master;
  file "/etc/bind/example.com.tokyo.zone";
  /* 以下略 */
 };
};

view "uk" {
 match-clients { uk; };
 zone "example.com" {
  type master;
  file "/etc/bind/example.com.london.zone";
  /* 以下略 */
 };
};

view "other" {
 zone "example.com" {
  type master;
  file "/etc/bind/example.com.other.zone";
  /* 以下略 */
 };
};

named.conf.options

logging {
 channel queries_file {
  file "/var/log/named/queries.log"
  versions 3 size 5m;
  severity dynamic;
  print-time yes;
 };
};

queries.log

08-Jan-2016 8:45:10.527 client 104.238.171.177#39341 (example.com): view uk: query: example.com IN A + (172.31.22.25)
08-Jan-2016 8:49:30.593 client 202.157.182.142#2043 (example.com): view other: query: example.com IN SOA -T (172.31.22.25)
08-Jan-2016 8:54:06.839 client 157.192.160.134#40687 (example.com): view jp: query: example.com IN A + (172.31.22.25)

ubuntu14.04-add-bind9.10-ppa.sh

#!/bin/bash
sudo add-apt-repository ppa:mgrocock/bind9
sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com 083F021DDC682B55
sudo apt-get up{dat,grad}e -y