1

Internet Week 2005 -DNS DAY-

OCN Lame

NTTOCN / yosimura@ocn.ad.jp

2

1. Lame n OCN n

2. () n NSwhoisExpire n OCN

3

1. Lame

4

1-1. Lame

n Lame n DNS

n NSDNS

n n OCN

n Lame

5

1-2. Lame (OCN DNS)

OCNDNSLame(2005/11/18-23)

0.00%

1.00%

2.00%

3.00%

4.00%

5.00%

6.00%

2005/11/18

2005/11/19

2005/11/20

2005/11/21

2005/11/22

2005/11/23 DNS1

DNS2

OCN DNS (2005/11/18-23)

34 Lame

6

1-3. Lame (OCN DNS)

Lame11/18-2361%

7% 2% 0% 0% 1% 0% 1% 0% 0% 4%12%

5% 1% 5%0.00%

10.00%20.00%30.00%40.00%50.00%60.00%70.00%

in-addr.arpa

co.jpne.jp

gr.jpad.jp

ac.jped.jp

or.jpgo.jp

lg.jpjp com

netorg

etc

in-addr.arpa Lame 60% com

Lame

.cn, .tw,

.info

7

1-4. Lame

n Lame

n C n /25 n n CNAME

160.139.203.in-addr.arpa DNS

DNS-A

0-127.160.139.203.in-addr.arpa

160.139.203.in-addr.arpa 0-127.160.139.203.in-addr.arpa. IN NS DNS-A 0-127.160.139.203.in-addr.arpa. IN NS DNS-B 1.160.139.203.in-addr.arpa. IN CNAME 1.0-127.160.139.203.in-addr.arpa.

DNS-B

203.139.160.0/25

8

1-5.

OCNDNS QTYPE2003/05/012005/11/29

0.0%

10.0%

20.0%

30.0%

40.0%

50.0%

60.0%

70.0%

80.0%

2003/5/1

2003/6/1

2003/7/1

2003/8/1

2003/9/1

2003/10/1

2003/11/1

2003/12/1

2004/1/1

2004/2/1

2004/3/1

2004/4/1

2004/5/1

2004/6/1

2004/7/1

2004/8/1

2004/9/1

2004/10/1

2004/11/1

2004/12/1

2005/1/1

2005/2/1

2005/3/1

2005/4/1

2005/5/1

2005/6/1

2005/7/1

2005/8/1

2005/9/1

2005/10/1

2005/11/1

A(%)

NS(%)

PTR(%)

MX(%)

n n 40

9

1-6. Lame

n n /25 n

n OCN

n n n OCN DNS4

10

2.

11

ocn.jp. IN NS dns1.example.com

2-1.

n

n ocn.jpNSexample.com n example.com dns1.example.com

n dns1.example.comocn.jpDNS

n ocn.jp

12

2-2. OCN

n NSexpire n OCNJP

n 0.03%0.01%

n OCN n NS n n JP

+++.co.jp. IN NS ns-XXX.onc.ad.jp. +++.co.jp. IN NS ns.XXX.jp.

13

2-3. expire

n 20042 n Expire n n queryDNSforward

n 2005 n Expire

n Network SolutionsWEB

n whois

n Expire232

14

2-4. expire

n n n ISP

n n 40, 60, 90

n n

n