Gentoo Archives: gentoo-user

From: Alan McKinnon <alan.mckinnon@×××××.com>
To: gentoo-user@l.g.o
Subject: Re: [gentoo-user] Strange gentoo.org address
Date: Thu, 07 Apr 2011 23:11:14
Message-Id: 201104080109.29624.alan.mckinnon@gmail.com
1 On Friday 08 April 2011 00:55:19 Peter Humphrey wrote:
2 > Hello list,
3 >
4 > Why do boxes on my network return this?
5 >
6 > $ nslookup www.gentoo.org
7 > Server: 127.0.0.1
8 > Address: 127.0.0.1#53
9 >
10 > Non-authoritative answer:
11 > www.gentoo.org canonical name = www-bytemark.gentoo.org.
12 > Name: www-bytemark.gentoo.org
13 > Address: 89.16.167.134
14
15 Short answer: it is correct, working as designed.
16
17 Long answer:
18
19 That answer came from a DNS cache, which by definition is not authoritative -
20 it is merely a copy (which you trust to be legit)
21
22 It does match the actual records on the real auth servers:
23
24 ===========
25 $ dig NS gentoo.org +trace
26
27 [snip]
28
29 gentoo.org. 86400 IN NS ns1.gentoo.org.
30 gentoo.org. 86400 IN NS ns2.gentoo.org.
31 ;; Received 96 bytes from 199.19.56.1#53(a0.org.afilias-nst.info) in 460 ms
32
33 gentoo.org. 86400 IN NS ns1.gentoo.org.
34 gentoo.org. 86400 IN NS ns2.gentoo.org.
35 ;; Received 96 bytes from 194.116.84.30#53(ns2.gentoo.org) in 214 ms
36
37
38 $ dig A www.gentoo.org @ns1.gentoo.org +short
39 www-bytemark.gentoo.org.
40 89.16.167.134
41
42 $ dig A ns1.gentoo.org +short
43 208.92.234.78
44 ============
45
46
47
48
49 --
50 Alan McKinnon
51 Systems Engineer^W Technician
52 Infrastructure Services
53 Internet Solutions
54
55 +27 11 575 7585
56
57 --
58 alan dot mckinnon at gmail dot com

Replies

Subject Author
Re: [gentoo-user] Strange gentoo.org address Peter Humphrey <peter@××××××××××××××.org>