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List:       djbdns
Subject:    Various "lame" errors
From:       "Robin Bowes" <robin-lists () robinbowes ! com>
Date:       2004-02-29 23:08:07
Message-ID: 1152.192.168.1.100.1078096087.squirrel () 192 ! 168 ! 1 ! 100
[Download RAW message or body]

Hi,

I've recently started having problems resolving certain domain names; this
message explains my setup and what problems I'm experiencing.

I'm running djbdns on a Fedora Core 1 box on my internal network
(192.168.x) and I have an NTL cable connection with a dynamic IP address
(which in practise doesn't actually change very often). I use dyndns.org
to make robinbowes.com resolve to the IP address supplied by my ISP.

My config looks like this:
******************
/service/dnscache/
******************

+++ Configuration options:
CACHESIZE:1000000
DATALIMIT:3000000
IP:192.168.1.20
IPSEND:0.0.0.0
ROOT:/etc/dnscache/root

+++ Authorised client IP address prefixes:
127.0.0.1
192.168.1
192.168.2

+++ Hardwired content server IP addresses:
@:198.41.0.4
@:192.228.79.201
@:192.33.4.12
@:128.8.10.90
@:192.203.230.10
@:192.5.5.241
@:192.112.36.4
@:128.63.2.53
@:192.36.148.17
@:192.58.128.30
@:193.0.14.129
@:198.32.64.12
@:202.12.27.33
1.168.192.in-addr.arpa:127.0.0.1
2.168.192.in-addr.arpa:127.0.0.1
robinbowes.com:127.0.0.1

I found that certain web sites and mail addresses are not resolving. Also,
some addresses are resolving, but are shown as "lame".

For example:

# dnsqr www.gentoo.org
1 www.gentoo.org:
temporary failure

Here's the log for that:

2004-02-29 23:00:40.057822500 query 45 c0a80114:6120:9e61 1 www.gentoo.org.
2004-02-29 23:00:40.057830500 cached ns gentoo.org. udns1.ultradns.net.
2004-02-29 23:00:40.057834500 cached ns gentoo.org. udns2.ultradns.net.
2004-02-29 23:00:40.057838500 cached 1 udns1.ultradns.net.
2004-02-29 23:00:40.057841500 cached 1 udns2.ultradns.net.
2004-02-29 23:00:40.057844500 tx 0 1 www.gentoo.org. gentoo.org. cc4a6501
cc45ea01 cc45ea01
2004-02-29 23:00:40.069923500 lame cc4a6501 gentoo.org. gentoo.org.
2004-02-29 23:00:40.069928500 tx 0 1 www.gentoo.org. gentoo.org. cc45ea01
cc45ea01
2004-02-29 23:00:40.080471500 lame cc45ea01 gentoo.org. gentoo.org.
2004-02-29 23:00:40.080476500 tx 0 1 www.gentoo.org. gentoo.org. cc45ea01
2004-02-29 23:00:40.092909500 lame cc45ea01 gentoo.org. gentoo.org.
2004-02-29 23:00:40.092914500 sent 45 32
2004-02-29 23:00:40.093296500 query 46 c0a80114:c35b:316d 1 www.gentoo.org.
2004-02-29 23:00:40.093301500 cached ns gentoo.org. udns1.ultradns.net.
2004-02-29 23:00:40.093305500 cached ns gentoo.org. udns2.ultradns.net.
2004-02-29 23:00:40.093309500 cached 1 udns1.ultradns.net.
2004-02-29 23:00:40.093312500 cached 1 udns2.ultradns.net.
2004-02-29 23:00:40.093315500 tx 0 1 www.gentoo.org. gentoo.org. cc45ea01
cc4a6501 cc45ea01
2004-02-29 23:00:40.115597500 lame cc45ea01 gentoo.org. gentoo.org.
2004-02-29 23:00:40.115602500 tx 0 1 www.gentoo.org. gentoo.org. cc45ea01
cc4a6501
2004-02-29 23:00:40.126206500 lame cc45ea01 gentoo.org. gentoo.org.
2004-02-29 23:00:40.126212500 tx 0 1 www.gentoo.org. gentoo.org. cc4a6501
2004-02-29 23:00:40.139012500 lame cc4a6501 gentoo.org. gentoo.org.
2004-02-29 23:00:40.139017500 sent 46 32
2004-02-29 23:00:51.122359500 query 47 c0a80114:4f5c:458e 1 www.gentoo.org.
2004-02-29 23:00:51.122367500 cached ns gentoo.org. udns1.ultradns.net.
2004-02-29 23:00:51.122371500 cached ns gentoo.org. udns2.ultradns.net.
2004-02-29 23:00:51.122375500 cached 1 udns1.ultradns.net.
2004-02-29 23:00:51.122378500 cached 1 udns2.ultradns.net.
2004-02-29 23:00:51.122381500 tx 0 1 www.gentoo.org. gentoo.org. cc45ea01
cc4a6501 cc45ea01
2004-02-29 23:00:51.137527500 lame cc45ea01 gentoo.org. gentoo.org.
2004-02-29 23:00:51.137532500 tx 0 1 www.gentoo.org. gentoo.org. cc4a6501
cc45ea01
2004-02-29 23:00:51.153986500 lame cc4a6501 gentoo.org. gentoo.org.
2004-02-29 23:00:51.153992500 tx 0 1 www.gentoo.org. gentoo.org. cc45ea01
2004-02-29 23:00:51.165995500 lame cc45ea01 gentoo.org. gentoo.org.
2004-02-29 23:00:51.166000500 sent 47 32

Funnilly enough, a related address works OK:

# dnsqr a forums.gentoo.org
1 forums.gentoo.org:
51 bytes, 1+1+0+0 records, response, noerror
query: 1 forums.gentoo.org
answer: forums.gentoo.org 80957 A 128.193.0.38

And here's the log for that:

2004-02-29 23:02:28.168904500 query 48 c0a80114:e4a8:d888 1
forums.gentoo.org.
2004-02-29 23:02:28.168913500 cached 1 forums.gentoo.org.
2004-02-29 23:02:28.168916500 sent 48 51

Or another address that works:

And the log:

2004-02-29 23:03:25.923750500 query 50 c0a80114:7f5f:3f23 1 www.demon.net.
2004-02-29 23:03:25.923758500 cached ns www.demon.net. ns0.demon.co.uk.
2004-02-29 23:03:25.923762500 cached ns www.demon.net. ns1.demon.co.uk.
2004-02-29 23:03:25.923766500 cached ns www.demon.net. ns2.demon.net.
2004-02-29 23:03:25.923770500 cached 1 ns0.demon.co.uk.
2004-02-29 23:03:25.923773500 cached 1 ns1.demon.co.uk.
2004-02-29 23:03:25.923776500 cached 1 ns2.demon.net.
2004-02-29 23:03:25.923779500 tx 0 1 www.demon.net. www.demon.net.
9e9801c1 d1f67e6d 9e980141
2004-02-29 23:03:25.935672500 lame 9e9801c1 www.demon.net. www.demon.net.
2004-02-29 23:03:25.935677500 tx 0 1 www.demon.net. www.demon.net.
d1f67e6d 9e980141
2004-02-29 23:03:25.947652500 lame d1f67e6d www.demon.net. www.demon.net.
2004-02-29 23:03:25.947658500 tx 0 1 www.demon.net. www.demon.net. 9e980141
2004-02-29 23:03:25.963580500 rr 9e980141 300 1 www.demon.net. c29ff58d
2004-02-29 23:03:25.963586500 rr 9e980141 86400 ns www.demon.net.
ns0.demon.co.uk.
2004-02-29 23:03:25.963590500 rr 9e980141 86400 ns www.demon.net.
ns1.demon.co.uk.
2004-02-29 23:03:25.963594500 rr 9e980141 86400 ns www.demon.net.
ns2.demon.net.
2004-02-29 23:03:25.963598500 stats 50 18403 1 0
2004-02-29 23:03:25.963601500 sent 50 47

If I change the dnscache to do forward only to my ISP name servers
(194.168.4.100 and 194.168.8.100) then I see similar results.

However, if I change /etc/resolv.conf to use the ISP servers directly then
the domains resolve OK, e.g.:

# dnsqr a www.gentoo.org
1 www.gentoo.org:
132 bytes, 1+3+2+0 records, response, noerror
query: 1 www.gentoo.org
answer: www.gentoo.org 600 A 203.112.31.164
answer: www.gentoo.org 600 A 212.162.48.146
answer: www.gentoo.org 600 A 64.5.62.82
authority: gentoo.org 86400 NS udns1.ultradns.net
authority: gentoo.org 86400 NS udns2.ultradns.net

Any idea what might be causing this?

R.
-- 
http://robinbowes.com
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