puzzling dnscache behavior

Nicholas Leippe nick at leippe.com
Mon Jun 23 09:31:51 MDT 2008


On Friday 20 June 2008, Andy Bradford wrote:
> Can you post the relevant logs from when this occurs? Also, can you post
> relevant sections of logs from when you have a successful lookup?

Here is what gets written to the log when I do:

# dnsqr a rss.slashdot.org
1 rss.slashdot.org:
temporary failure

while it is not working:

@40000000485fbfb7348a66bc query 50884 7f000001:5f46:f243 1 rss.slashdot.org.
@40000000485fbfb7348a7274 tx 0 1 rss.slashdot.org. . c0cbe60a 80080a5a c1000e81 c0702404 c03a801e ca0c1b21 c021040c c0249411 803f0235 c6290004 c707532a c0e44fc9 c00505f1
@40000000485fbfb7361396fc rr c0cbe60a 172800 1 tld1.ultradns.net. cc4a7001
@40000000485fbfb73613a2b4 rr c0cbe60a 172800 1 tld2.ultradns.net. cc4a7101
@40000000485fbfb73613ae6c rr c0cbe60a 172800 1 b0.org.afilias-nst.org. c7133601
@40000000485fbfb73613b63c rr c0cbe60a 172800 1 d0.org.afilias-nst.org. c7133901
@40000000485fbfb73613be0c rr c0cbe60a 172800 1 a0.org.afilias-nst.info. c7133801
@40000000485fbfb73613c9c4 rr c0cbe60a 172800 1 c0.org.afilias-nst.info. c7133501
@40000000485fbfb73613d194 rr c0cbe60a 172800 ns org. tld2.ultradns.net.
@40000000485fbfb73614e6ec rr c0cbe60a 172800 ns org. a0.org.afilias-nst.info.
@40000000485fbfb73614eebc rr c0cbe60a 172800 ns org. tld1.ultradns.net.
@40000000485fbfb73614f68c rr c0cbe60a 172800 ns org. d0.org.afilias-nst.org.
@40000000485fbfb736150244 rr c0cbe60a 172800 ns org. b0.org.afilias-nst.org.
@40000000485fbfb736150a14 rr c0cbe60a 172800 ns org. c0.org.afilias-nst.info.
@40000000485fbfb7361511e4 rr c0cbe60a 172800 28 tld1.ultradns.net. 20010502d39900000000000000000001
@40000000485fbfb7361538f4 rr c0cbe60a 172800 28 b0.org.afilias-nst.org. 20010500000c00000000000000000001
@40000000485fbfb7361544ac rr c0cbe60a 172800 28 d0.org.afilias-nst.org. 20010500000f00000000000000000001
@40000000485fbfb736154c7c rr c0cbe60a 172800 28 a0.org.afilias-nst.info. 20010500000e00000000000000000001
@40000000485fbfb736155834 rr c0cbe60a 172800 28 c0.org.afilias-nst.info. 20010500000b00000000000000000001
@40000000485fbfb736157b5c stats 50884 11328449 3 0
@40000000485fbfb73615ae24 cached 1 tld2.ultradns.net.
@40000000485fbfb73615b5f4 cached 1 a0.org.afilias-nst.info.
@40000000485fbfb73615bdc4 cached 1 tld1.ultradns.net.
@40000000485fbfb73615c594 cached 1 d0.org.afilias-nst.org.
@40000000485fbfb73615cd64 cached 1 b0.org.afilias-nst.org.
@40000000485fbfb73615d534 cached 1 c0.org.afilias-nst.info.
@40000000485fbfb73615e0ec tx 0 1 rss.slashdot.org. org. c7133601 c7133801 c7133501 cc4a7001 c7133901 cc4a7101
@40000000485fbfb7393bf84c rr c7133601 86400 ns slashdot.org. ns-3.corp.sourceforge.com.
@40000000485fbfb7393c0bd4 rr c7133601 86400 ns slashdot.org. ns-1.ch3.sourceforge.com.
@40000000485fbfb7393c13a4 rr c7133601 86400 ns slashdot.org. ns-2.ch3.sourceforge.com.
@40000000485fbfb7393c1f5c stats 50884 11328564 3 0
@40000000485fbfb7393c2b14 cached 1 ns-3.corp.sourceforge.com.
@40000000485fbfb7393c32e4 cached 1 ns-1.ch3.sourceforge.com.
@40000000485fbfb7393c3e9c cached 1 ns-2.ch3.sourceforge.com.
@40000000485fbfb7393c4a54 tx 0 1 rss.slashdot.org. slashdot.org. d822b515 0c1fa54f d822b516
@40000000485fbfba35ae7c2c query 50885 7f000001:7efa:3108 1 rss.slashdot.org.
@40000000485fbfba35ae87e4 tx 0 1 rss.slashdot.org. . c707532a c0702404 c0249411 ca0c1b21 c021040c c03a801e 80080a5a 803f0235 c00505f1 c0e44fc9 c1000e81 c0cbe60a c6290004
@40000000485fbfba3814e53c servfail rss.slashdot.org. input/output error
@40000000485fbfba3814f0f4 sent 50879 34
@40000000485fbfba3a24356c rr c707532a 172800 1 tld1.ultradns.net. cc4a7001
@40000000485fbfba3a244124 rr c707532a 172800 1 tld2.ultradns.net. cc4a7101
@40000000485fbfba3a2448f4 rr c707532a 172800 1 b0.org.afilias-nst.org. c7133601
@40000000485fbfba3a2454ac rr c707532a 172800 1 d0.org.afilias-nst.org. c7133901
@40000000485fbfba3a245c7c rr c707532a 172800 1 a0.org.afilias-nst.info. c7133801
@40000000485fbfba3a24644c rr c707532a 172800 1 c0.org.afilias-nst.info. c7133501
@40000000485fbfba3a246c1c rr c707532a 172800 ns org. a0.org.afilias-nst.info.
@40000000485fbfba3a24e14c rr c707532a 172800 ns org. b0.org.afilias-nst.org.
@40000000485fbfba3a24e91c rr c707532a 172800 ns org. c0.org.afilias-nst.info.
@40000000485fbfba3a24f0ec rr c707532a 172800 ns org. d0.org.afilias-nst.org.
@40000000485fbfba3a24f8bc rr c707532a 172800 ns org. tld1.ultradns.net.
@40000000485fbfba3a25008c rr c707532a 172800 ns org. tld2.ultradns.net.
@40000000485fbfba3a250c44 rr c707532a 172800 28 tld1.ultradns.net. 20010502d39900000000000000000001
@40000000485fbfba3a253354 rr c707532a 172800 28 b0.org.afilias-nst.org. 20010500000c00000000000000000001
@40000000485fbfba3a253b24 rr c707532a 172800 28 d0.org.afilias-nst.org. 20010500000f00000000000000000001
@40000000485fbfba3a2546dc rr c707532a 172800 28 a0.org.afilias-nst.info. 20010500000e00000000000000000001
@40000000485fbfba3a254eac rr c707532a 172800 28 c0.org.afilias-nst.info. 20010500000b00000000000000000001
@40000000485fbfba3a2619cc stats 50885 11329336 3 0
@40000000485fbfba3a2648ac cached 1 a0.org.afilias-nst.info.
@40000000485fbfba3a265464 cached 1 b0.org.afilias-nst.org.
@40000000485fbfba3a265c34 cached 1 c0.org.afilias-nst.info.
@40000000485fbfba3a26601c cached 1 d0.org.afilias-nst.org.
@40000000485fbfba3a266bd4 cached 1 tld1.ultradns.net.
@40000000485fbfba3a2673a4 cached 1 tld2.ultradns.net.
@40000000485fbfba3a267b74 tx 0 1 rss.slashdot.org. org. cc4a7101 c7133501 c7133801 cc4a7001 c7133901 c7133601
@40000000485fbfbb01ef3b4c rr cc4a7101 86400 ns slashdot.org. ns-3.corp.sourceforge.com.
@40000000485fbfbb01ef4aec rr cc4a7101 86400 ns slashdot.org. ns-2.ch3.sourceforge.com.
@40000000485fbfbb01ef52bc rr cc4a7101 86400 ns slashdot.org. ns-1.ch3.sourceforge.com.
@40000000485fbfbb01ef5e74 stats 50885 11329451 3 0
@40000000485fbfbb01ef6644 cached 1 ns-3.corp.sourceforge.com.
@40000000485fbfbb01ef6a2c cached 1 ns-2.ch3.sourceforge.com.
@40000000485fbfbb01ef75e4 cached 1 ns-1.ch3.sourceforge.com.
@40000000485fbfbb01ef7db4 tx 0 1 rss.slashdot.org. slashdot.org. d822b516 0c1fa54f d822b515
@40000000485fbfbd3b1deb34 servfail rss.slashdot.org. input/output error
@40000000485fbfbd3b1df6ec sent 50882 34
@40000000485fbfc536c95e24 query 50886 7f000001:8003:ba48 1 rss.slashdot.org.
@40000000485fbfc536c96dc4 tx 0 1 rss.slashdot.org. . c707532a 80080a5a c0249411 ca0c1b21 c00505f1 c0cbe60a c1000e81 803f0235 c021040c c0702404 c0e44fc9 c6290004 c03a801e
@40000000485fbfc53b4ab7f4 rr c707532a 172800 1 tld1.ultradns.net. cc4a7001
@40000000485fbfc53b4ac3ac rr c707532a 172800 1 tld2.ultradns.net. cc4a7101
@40000000485fbfc53b4acf64 rr c707532a 172800 1 b0.org.afilias-nst.org. c7133601
@40000000485fbfc53b4ad734 rr c707532a 172800 1 d0.org.afilias-nst.org. c7133901
@40000000485fbfc53b4adf04 rr c707532a 172800 1 a0.org.afilias-nst.info. c7133801
@40000000485fbfc53b4aeabc rr c707532a 172800 1 c0.org.afilias-nst.info. c7133501
@40000000485fbfc53b4af28c rr c707532a 172800 ns org. a0.org.afilias-nst.info.
@40000000485fbfc53b4b5fec rr c707532a 172800 ns org. b0.org.afilias-nst.org.
@40000000485fbfc53b4b6ba4 rr c707532a 172800 ns org. c0.org.afilias-nst.info.
@40000000485fbfc53b4b7374 rr c707532a 172800 ns org. d0.org.afilias-nst.org.
@40000000485fbfc53b4b7b44 rr c707532a 172800 ns org. tld1.ultradns.net.
@40000000485fbfc53b4b8314 rr c707532a 172800 ns org. tld2.ultradns.net.
@40000000485fbfc53b4b8ecc rr c707532a 172800 28 tld1.ultradns.net. 20010502d39900000000000000000001
@40000000485fbfc53b4bb1f4 rr c707532a 172800 28 b0.org.afilias-nst.org. 20010500000c00000000000000000001
@40000000485fbfc53b4bb9c4 rr c707532a 172800 28 d0.org.afilias-nst.org. 20010500000f00000000000000000001
@40000000485fbfc53b4bc57c rr c707532a 172800 28 a0.org.afilias-nst.info. 20010500000e00000000000000000001
@40000000485fbfc53b4bcd4c rr c707532a 172800 28 c0.org.afilias-nst.info. 20010500000b00000000000000000001
@40000000485fbfc53b4bf45c stats 50886 11330223 3 0
@40000000485fbfc53b4c233c cached 1 a0.org.afilias-nst.info.
@40000000485fbfc53b4c2b0c cached 1 b0.org.afilias-nst.org.
@40000000485fbfc53b4c32dc cached 1 c0.org.afilias-nst.info.
@40000000485fbfc53b4c3e94 cached 1 d0.org.afilias-nst.org.
@40000000485fbfc53b4c4664 cached 1 tld1.ultradns.net.
@40000000485fbfc53b4c4e34 cached 1 tld2.ultradns.net.
@40000000485fbfc53b4c5604 tx 0 1 rss.slashdot.org. org. c7133501 c7133901 cc4a7001 c7133601 cc4a7101 c7133801
@40000000485fbfc601e0e754 rr c7133501 86400 ns slashdot.org. ns-2.ch3.sourceforge.com.
@40000000485fbfc601e0f30c rr c7133501 86400 ns slashdot.org. ns-1.ch3.sourceforge.com.
@40000000485fbfc601e0fec4 rr c7133501 86400 ns slashdot.org. ns-3.corp.sourceforge.com.
@40000000485fbfc601e10a7c stats 50886 11330338 3 0
@40000000485fbfc601e1124c cached 1 ns-2.ch3.sourceforge.com.
@40000000485fbfc601e11e04 cached 1 ns-1.ch3.sourceforge.com.
@40000000485fbfc601e125d4 cached 1 ns-3.corp.sourceforge.com.
@40000000485fbfc601e1318c tx 0 1 rss.slashdot.org. slashdot.org. d822b516 0c1fa54f d822b515
@40000000485fbfd62e8c773c query 50887 7f000001:d75f:6ca7 12 0.0.0.10.in-addr.arpa.
@40000000485fbfd62e8c9294 tx 0 12 0.0.0.10.in-addr.arpa. . c707532a c6290004 c00505f1 803f0235 c03a801e c021040c ca0c1b21 80080a5a c0cbe60a c0249411 c0702404 c1000e81 c0e44fc9
@40000000485fbfd632fc77a4 rr c707532a 86400 ns 10.in-addr.arpa. blackhole-1.iana.org.
@40000000485fbfd632fc8744 rr c707532a 86400 ns 10.in-addr.arpa. blackhole-2.iana.org.
@40000000485fbfd632fc92fc stats 50887 11330421 4 0
@40000000485fbfd632fc9acc tx 1 1 blackhole-1.iana.org. . ca0c1b21 c6290004 c0249411 c00505f1 c021040c 803f0235 c0cbe60a c707532a c0702404 c03a801e 80080a5a c1000e81 c0e44fc9
@40000000485fbfd63a9ad49c rr ca0c1b21 172800 1 tld1.ultradns.net. cc4a7001
@40000000485fbfd63a9ae054 rr ca0c1b21 172800 1 tld2.ultradns.net. cc4a7101
@40000000485fbfd63a9aec0c rr ca0c1b21 172800 1 b0.org.afilias-nst.org. c7133601
@40000000485fbfd63a9af3dc rr ca0c1b21 172800 1 d0.org.afilias-nst.org. c7133901
@40000000485fbfd63a9afbac rr ca0c1b21 172800 1 a0.org.afilias-nst.info. c7133801
@40000000485fbfd63a9b0b4c rr ca0c1b21 172800 1 c0.org.afilias-nst.info. c7133501
@40000000485fbfd63a9b131c rr ca0c1b21 172800 ns org. a0.org.afilias-nst.info.
@40000000485fbfd63a9b9bd4 rr ca0c1b21 172800 ns org. c0.org.afilias-nst.info.
@40000000485fbfd63a9ba78c rr ca0c1b21 172800 ns org. tld1.ultradns.net.
@40000000485fbfd63a9baf5c rr ca0c1b21 172800 ns org. tld2.ultradns.net.
@40000000485fbfd63a9bbb14 rr ca0c1b21 172800 ns org. b0.org.afilias-nst.org.
@40000000485fbfd63a9bc2e4 rr ca0c1b21 172800 ns org. d0.org.afilias-nst.org.
@40000000485fbfd63a9bcab4 rr ca0c1b21 172800 28 tld1.ultradns.net. 20010502d39900000000000000000001
@40000000485fbfd63a9beddc rr ca0c1b21 172800 28 b0.org.afilias-nst.org. 20010500000c00000000000000000001
@40000000485fbfd63a9bf994 rr ca0c1b21 172800 28 d0.org.afilias-nst.org. 20010500000f00000000000000000001
@40000000485fbfd63a9c054c rr ca0c1b21 172800 28 a0.org.afilias-nst.info. 20010500000e00000000000000000001
@40000000485fbfd63a9c0d1c rr ca0c1b21 172800 28 c0.org.afilias-nst.info. 20010500000b00000000000000000001
@40000000485fbfd63a9c342c stats 50887 11331193 4 0
@40000000485fbfd63a9c630c cached 1 a0.org.afilias-nst.info.
@40000000485fbfd63a9c6adc cached 1 c0.org.afilias-nst.info.
@40000000485fbfd63a9c72ac cached 1 tld1.ultradns.net.
@40000000485fbfd63a9c7e64 cached 1 tld2.ultradns.net.
@40000000485fbfd63a9c8634 cached 1 b0.org.afilias-nst.org.
@40000000485fbfd63a9c8e04 cached 1 d0.org.afilias-nst.org.
@40000000485fbfd63a9c95d4 tx 1 1 blackhole-1.iana.org. org. c7133801 c7133501 c7133601 c7133901 cc4a7001 cc4a7101
@40000000485fbfd701aaeeec rr c7133801 172800 1 ns.icann.org. c000227e
@40000000485fbfd701aafaa4 rr c7133801 86400 1 b.iana-servers.org. c10000ec
@40000000485fbfd701ab0274 rr c7133801 86400 ns iana.org. ns.icann.org.
@40000000485fbfd701ab0e2c rr c7133801 86400 ns iana.org. c.iana-servers.net.
@40000000485fbfd701ab19e4 rr c7133801 86400 ns iana.org. b.iana-servers.org.
@40000000485fbfd701ab21b4 rr c7133801 86400 ns iana.org. a.iana-servers.net.
@40000000485fbfd701ab2984 rr c7133801 86400 ns iana.org. d.iana-servers.net.
@40000000485fbfd701aba29c stats 50887 11331405 4 0
@40000000485fbfd701abaa6c cached 1 ns.icann.org.
@40000000485fbfd701abb23c cached 1 c.iana-servers.net.
@40000000485fbfd701abba0c cached 1 b.iana-servers.org.
@40000000485fbfd701abc5c4 cached 1 a.iana-servers.net.
@40000000485fbfd701abcd94 cached 1 d.iana-servers.net.
@40000000485fbfd701abd564 tx 1 1 blackhole-1.iana.org. iana.org. c000222b c000227e 8b5b010a c10000ec d04dbc2c 8b5b010a
@40000000485fbfd702de42b4 rr c000222b 3600 1 blackhole-1.iana.org. c0af3006
@40000000485fbfd702de4e6c rr c000222b 86400 ns iana.org. a.iana-servers.net.
@40000000485fbfd702de5a24 rr c000222b 86400 ns iana.org. b.iana-servers.org.
@40000000485fbfd702de61f4 rr c000222b 86400 ns iana.org. c.iana-servers.net.
@40000000485fbfd702de69c4 rr c000222b 86400 ns iana.org. d.iana-servers.net.
@40000000485fbfd702de7194 rr c000222b 86400 ns iana.org. ns.icann.org.
@40000000485fbfd702de7964 stats 50887 11331579 4 0
@40000000485fbfd702de851c tx 1 1 blackhole-2.iana.org. . 80080a5a c6290004 c0e44fc9 c00505f1 ca0c1b21 c021040c 803f0235 c0702404 c1000e81 c0249411 c707532a c0cbe60a c03a801e
@40000000485fbfd707e3ad1c rr 80080a5a 172800 1 tld1.ultradns.net. cc4a7001
@40000000485fbfd707e3b8d4 rr 80080a5a 172800 1 tld2.ultradns.net. cc4a7101
@40000000485fbfd707e3c48c rr 80080a5a 172800 1 b0.org.afilias-nst.org. c7133601
@40000000485fbfd707e3cc5c rr 80080a5a 172800 1 d0.org.afilias-nst.org. c7133901
@40000000485fbfd707e3d814 rr 80080a5a 172800 1 a0.org.afilias-nst.info. c7133801
@40000000485fbfd707e3e3cc rr 80080a5a 172800 1 c0.org.afilias-nst.info. c7133501
@40000000485fbfd707e3eb9c rr 80080a5a 172800 ns org. tld2.ultradns.net.
@40000000485fbfd707e45ce4 rr 80080a5a 172800 ns org. d0.org.afilias-nst.org.
@40000000485fbfd707e464b4 rr 80080a5a 172800 ns org. b0.org.afilias-nst.org.
@40000000485fbfd707e4706c rr 80080a5a 172800 ns org. tld1.ultradns.net.
@40000000485fbfd707e4783c rr 80080a5a 172800 ns org. c0.org.afilias-nst.info.
@40000000485fbfd707e483f4 rr 80080a5a 172800 ns org. a0.org.afilias-nst.info.
@40000000485fbfd707e48fac rr 80080a5a 172800 28 tld1.ultradns.net. 20010502d39900000000000000000001
@40000000485fbfd707e4b6bc rr 80080a5a 172800 28 b0.org.afilias-nst.org. 20010500000c00000000000000000001
@40000000485fbfd707e4c274 rr 80080a5a 172800 28 d0.org.afilias-nst.org. 20010500000f00000000000000000001
@40000000485fbfd707e4ca44 rr 80080a5a 172800 28 a0.org.afilias-nst.info. 20010500000e00000000000000000001
@40000000485fbfd707e4d5fc rr 80080a5a 172800 28 c0.org.afilias-nst.info. 20010500000b00000000000000000001
@40000000485fbfd707e4f924 stats 50887 11332351 4 0
@40000000485fbfd707e52804 cached 1 tld2.ultradns.net.
@40000000485fbfd707e533bc cached 1 d0.org.afilias-nst.org.
@40000000485fbfd707e53f74 cached 1 b0.org.afilias-nst.org.
@40000000485fbfd707e54b2c cached 1 tld1.ultradns.net.
@40000000485fbfd707e552fc cached 1 c0.org.afilias-nst.info.
@40000000485fbfd707e55eb4 cached 1 a0.org.afilias-nst.info.
@40000000485fbfd707e56684 tx 1 1 blackhole-2.iana.org. org. c7133501 c7133601 cc4a7101 c7133901 cc4a7001 c7133801
@40000000485fbfd70a2aa364 rr c7133501 172800 1 ns.icann.org. c000227e
@40000000485fbfd70a2aaf1c rr c7133501 86400 1 b.iana-servers.org. c10000ec
@40000000485fbfd70a2abad4 rr c7133501 86400 ns iana.org. ns.icann.org.
@40000000485fbfd70a2ac2a4 rr c7133501 86400 ns iana.org. c.iana-servers.net.
@40000000485fbfd70a2ace5c rr c7133501 86400 ns iana.org. b.iana-servers.org.
@40000000485fbfd70a2ada14 rr c7133501 86400 ns iana.org. a.iana-servers.net.
@40000000485fbfd70a2ae1e4 rr c7133501 86400 ns iana.org. d.iana-servers.net.
@40000000485fbfd70a2b532c stats 50887 11332563 4 0
@40000000485fbfd70a2b5afc cached 1 ns.icann.org.
@40000000485fbfd70a2b66b4 cached 1 c.iana-servers.net.
@40000000485fbfd70a2b726c cached 1 b.iana-servers.org.
@40000000485fbfd70a2b7a3c cached 1 a.iana-servers.net.
@40000000485fbfd70a2b85f4 cached 1 d.iana-servers.net.
@40000000485fbfd70a2b8dc4 tx 1 1 blackhole-2.iana.org. iana.org. c000227e c10000ec c000222b 8b5b010a 8b5b010a d04dbc2c
@40000000485fbfd70b625c2c rr c000227e 3600 1 blackhole-2.iana.org. c0af302a
@40000000485fbfd70b626fb4 rr c000227e 86400 ns iana.org. a.iana-servers.net.
@40000000485fbfd70b627784 rr c000227e 86400 ns iana.org. b.iana-servers.org.
@40000000485fbfd70b62833c rr c000227e 86400 ns iana.org. c.iana-servers.net.
@40000000485fbfd70b628b0c rr c000227e 86400 ns iana.org. d.iana-servers.net.
@40000000485fbfd70b6296c4 rr c000227e 86400 ns iana.org. ns.icann.org.
@40000000485fbfd70b62a27c stats 50887 11332737 4 0
@40000000485fbfd70b62aa4c tx 0 12 0.0.0.10.in-addr.arpa. 10.in-addr.arpa. c0af302a c0af3006
@40000000485fbfd70fa72de4 nxdomain c0af302a 3600 0.0.0.10.in-addr.arpa.
@40000000485fbfd70fa7416c sent 50887 39
@40000000485fbfd70fc25aec query 50888 7f000001:b630:4349 12 1.0.0.10.in-addr.arpa.
@40000000485fbfd70fc26a8c tx 0 12 1.0.0.10.in-addr.arpa. . c0702404 c021040c c707532a c0249411 c0cbe60a c00505f1 c0e44fc9 c6290004 803f0235 c1000e81 ca0c1b21 c03a801e 80080a5a
@40000000485fbfd713f2f0f4 rr c0702404 86400 ns 10.in-addr.arpa. blackhole-2.iana.org.
@40000000485fbfd713f30094 rr c0702404 86400 ns 10.in-addr.arpa. blackhole-1.iana.org.
@40000000485fbfd713f30864 stats 50888 11332865 4 0
@40000000485fbfd713f31034 cached 1 blackhole-2.iana.org.
@40000000485fbfd713f31bec cached 1 blackhole-1.iana.org.
@40000000485fbfd713f323bc tx 0 12 1.0.0.10.in-addr.arpa. 10.in-addr.arpa. c0af302a c0af3006
@40000000485fbfd7181d12a4 nxdomain c0af302a 3600 1.0.0.10.in-addr.arpa.
@40000000485fbfd7181d1e5c sent 50888 39
@40000000485fbfd91461c40c servfail rss.slashdot.org. input/output error
@40000000485fbfd91461d3ac sent 50884 34
@40000000485fbfdc18f6387c servfail rss.slashdot.org. input/output error
@40000000485fbfdc18f64434 sent 50885 34
@40000000485fbfe718722bcc servfail rss.slashdot.org. input/output error
@40000000485fbfe718723b6c sent 50886 34


When i do

# dnsqr cname rss.slashdot.org
5 rss.slashdot.org:
68 bytes, 1+1+0+0 records, response, noerror
query: 5 rss.slashdot.org
answer: rss.slashdot.org 3600 CNAME feeds.feedburner.com

the logs get:

@40000000485fc0b11c27aa1c query 50897 7f000001:f20d:ddd4 5 rss.slashdot.org.
@40000000485fc0b11c27b9bc tx 0 5 rss.slashdot.org. . c1000e81 80080a5a c0e44fc9 803f0235 c0cbe60a c0702404 c03a801e c707532a c6290004 c00505f1 ca0c1b21 c0249411 c021040c
@40000000485fc0b12515eb5c rr c1000e81 172800 1 tld1.ultradns.net. cc4a7001
@40000000485fc0b12515f714 rr c1000e81 172800 1 tld2.ultradns.net. cc4a7101
@40000000485fc0b12515fee4 rr c1000e81 172800 1 b0.org.afilias-nst.org. c7133601
@40000000485fc0b125160a9c rr c1000e81 172800 1 d0.org.afilias-nst.org. c7133901
@40000000485fc0b12516126c rr c1000e81 172800 1 a0.org.afilias-nst.info. c7133801
@40000000485fc0b125163d64 rr c1000e81 172800 1 c0.org.afilias-nst.info. c7133501
@40000000485fc0b12516491c rr c1000e81 172800 ns org. a0.org.afilias-nst.info.
@40000000485fc0b12516b67c rr c1000e81 172800 ns org. b0.org.afilias-nst.org.
@40000000485fc0b12516c234 rr c1000e81 172800 ns org. c0.org.afilias-nst.info.
@40000000485fc0b12516ca04 rr c1000e81 172800 ns org. d0.org.afilias-nst.org.
@40000000485fc0b12516d1d4 rr c1000e81 172800 ns org. tld1.ultradns.net.
@40000000485fc0b12516d9a4 rr c1000e81 172800 ns org. tld2.ultradns.net.
@40000000485fc0b12516e174 rr c1000e81 172800 28 tld1.ultradns.net. 20010502d39900000000000000000001
@40000000485fc0b125170884 rr c1000e81 172800 28 b0.org.afilias-nst.org. 20010500000c00000000000000000001
@40000000485fc0b125171054 rr c1000e81 172800 28 d0.org.afilias-nst.org. 20010500000f00000000000000000001
@40000000485fc0b125171c0c rr c1000e81 172800 28 a0.org.afilias-nst.info. 20010500000e00000000000000000001
@40000000485fc0b1251723dc rr c1000e81 172800 28 c0.org.afilias-nst.info. 20010500000b00000000000000000001
@40000000485fc0b125174aec stats 50897 11336660 1 0
@40000000485fc0b1251779cc cached 1 a0.org.afilias-nst.info.
@40000000485fc0b12517819c cached 1 b0.org.afilias-nst.org.
@40000000485fc0b12517896c cached 1 c0.org.afilias-nst.info.
@40000000485fc0b12517913c cached 1 d0.org.afilias-nst.org.
@40000000485fc0b12517990c cached 1 tld1.ultradns.net.
@40000000485fc0b12517a0dc cached 1 tld2.ultradns.net.
@40000000485fc0b12517a8ac tx 0 5 rss.slashdot.org. org. c7133801 c7133501 cc4a7101 cc4a7001 c7133601 c7133901
@40000000485fc0b127b0ed44 rr c7133801 86400 ns slashdot.org. ns-1.ch3.sourceforge.com.
@40000000485fc0b127b0fce4 rr c7133801 86400 ns slashdot.org. ns-3.corp.sourceforge.com.
@40000000485fc0b127b104b4 rr c7133801 86400 ns slashdot.org. ns-2.ch3.sourceforge.com.
@40000000485fc0b127b1106c stats 50897 11336775 1 0
@40000000485fc0b127b1183c cached 1 ns-1.ch3.sourceforge.com.
@40000000485fc0b127b1200c cached 1 ns-3.corp.sourceforge.com.
@40000000485fc0b127b127dc cached 1 ns-2.ch3.sourceforge.com.
@40000000485fc0b127b12fac tx 0 5 rss.slashdot.org. slashdot.org. d822b515 d822b516 0c1fa54f
@40000000485fc0b12b2d8144 rr d822b515 3600 cname rss.slashdot.org. feeds.feedburner.com.
@40000000485fc0b12b2d90e4 stats 50897 11336837 1 0
@40000000485fc0b12b2d98b4 sent 50897 68

after which

# dnsqr a rss.slashdot.org
1 rss.slashdot.org:
84 bytes, 1+2+0+0 records, response, noerror
query: 1 rss.slashdot.org
answer: rss.slashdot.org 3531 CNAME feeds.feedburner.com
answer: feeds.feedburner.com 300 A 66.150.96.119

now produces:

@40000000485fc0f636082164 query 50900 7f000001:40d4:a9e1 1 rss.slashdot.org.
@40000000485fc0f636083104 cached cname rss.slashdot.org. feeds.feedburner.com.
@40000000485fc0f6360838d4 tx 0 1 feeds.feedburner.com. . c021040c 803f0235 c0249411 c03a801e 80080a5a c0702404 c0cbe60a c1000e81 c0e44fc9 c00505f1 ca0c1b21 c707532a c6290004
@40000000485fc0f6373ecca4 rr c021040c 172800 1 a.gtld-servers.net. c005061e
@40000000485fc0f6373ed85c rr c021040c 172800 1 b.gtld-servers.net. c0210e1e
@40000000485fc0f6373ee02c rr c021040c 172800 1 c.gtld-servers.net. c01a5c1e
@40000000485fc0f6373eebe4 rr c021040c 172800 1 d.gtld-servers.net. c01f501e
@40000000485fc0f6373ef3b4 rr c021040c 172800 1 e.gtld-servers.net. c00c5e1e
@40000000485fc0f6373efb84 rr c021040c 172800 1 f.gtld-servers.net. c023331e
@40000000485fc0f6373f0354 rr c021040c 172800 1 g.gtld-servers.net. c02a5d1e
@40000000485fc0f63740207c rr c021040c 172800 1 h.gtld-servers.net. c036701e
@40000000485fc0f63740284c rr c021040c 172800 1 i.gtld-servers.net. c02bac1e
@40000000485fc0f63740301c rr c021040c 172800 1 j.gtld-servers.net. c0304f1e
@40000000485fc0f637403fbc rr c021040c 172800 1 k.gtld-servers.net. c034b21e
@40000000485fc0f637405efc rr c021040c 172800 1 l.gtld-servers.net. c029a21e
@40000000485fc0f6374066cc rr c021040c 172800 ns com. b.gtld-servers.net.
@40000000485fc0f637408ddc rr c021040c 172800 ns com. a.gtld-servers.net.
@40000000485fc0f6374095ac rr c021040c 172800 ns com. i.gtld-servers.net.
@40000000485fc0f637409d7c rr c021040c 172800 ns com. f.gtld-servers.net.
@40000000485fc0f63740a54c rr c021040c 172800 ns com. g.gtld-servers.net.
@40000000485fc0f63740b104 rr c021040c 172800 ns com. k.gtld-servers.net.
@40000000485fc0f63740b8d4 rr c021040c 172800 ns com. d.gtld-servers.net.
@40000000485fc0f63740c0a4 rr c021040c 172800 ns com. e.gtld-servers.net.
@40000000485fc0f63740e7b4 rr c021040c 172800 ns com. j.gtld-servers.net.
@40000000485fc0f63740ef84 rr c021040c 172800 ns com. l.gtld-servers.net.
@40000000485fc0f63741224c rr c021040c 172800 ns com. h.gtld-servers.net.
@40000000485fc0f637412a1c rr c021040c 172800 ns com. m.gtld-servers.net.
@40000000485fc0f6374135d4 rr c021040c 172800 ns com. c.gtld-servers.net.
@40000000485fc0f637413da4 rr c021040c 172800 28 a.gtld-servers.net. 20010503a83e00000000000000020030
@40000000485fc0f637414574 rr c021040c 172800 28 b.gtld-servers.net. 20010503231d00000000000000020030
@40000000485fc0f637414d44 stats 50900 11337796 1 0
@40000000485fc0f637417454 cached 1 b.gtld-servers.net.
@40000000485fc0f637417c24 cached 1 a.gtld-servers.net.
@40000000485fc0f6374183f4 cached 1 i.gtld-servers.net.
@40000000485fc0f6374187dc cached 1 f.gtld-servers.net.
@40000000485fc0f637418fac cached 1 g.gtld-servers.net.
@40000000485fc0f637419b64 cached 1 k.gtld-servers.net.
@40000000485fc0f63741a334 cached 1 d.gtld-servers.net.
@40000000485fc0f63741ab04 cached 1 e.gtld-servers.net.
@40000000485fc0f63741b2d4 cached 1 j.gtld-servers.net.
@40000000485fc0f63741d5fc cached 1 l.gtld-servers.net.
@40000000485fc0f63741ddcc cached 1 h.gtld-servers.net.
@40000000485fc0f63741e59c cached 1 m.gtld-servers.net.
@40000000485fc0f63741ed6c cached 1 c.gtld-servers.net.
@40000000485fc0f63741f53c tx 0 1 feeds.feedburner.com. com. c0304f1e c036701e c037531e c005061e c023331e c02bac1e c0210e1e c02a5d1e c00c5e1e c029a21e c01a5c1e c01f501e c034b21e
@40000000485fc0f703b9d98c rr c0304f1e 172800 ns feedburner.com. ns-a.pnap.net.
@40000000485fc0f703b9e544 rr c0304f1e 172800 ns feedburner.com. ns-b.pnap.net.
@40000000485fc0f703b9f0fc rr c0304f1e 172800 ns feedburner.com. ns-c.pnap.net.
@40000000485fc0f703b9f8cc rr c0304f1e 172800 ns feedburner.com. ns-d.pnap.net.
@40000000485fc0f703ba009c stats 50900 11337894 1 0
@40000000485fc0f703ba086c tx 1 1 ns-a.pnap.net. . c00505f1 803f0235 c0e44fc9 c021040c c03a801e 80080a5a c0cbe60a c6290004 c0702404 c707532a c0249411 ca0c1b21 c1000e81
@40000000485fc0f7055b1224 rr c00505f1 172800 1 a.gtld-servers.net. c005061e
@40000000485fc0f7055b21c4 rr c00505f1 172800 1 b.gtld-servers.net. c0210e1e
@40000000485fc0f7055b2994 rr c00505f1 172800 1 c.gtld-servers.net. c01a5c1e
@40000000485fc0f7055b354c rr c00505f1 172800 1 d.gtld-servers.net. c01f501e
@40000000485fc0f7055b4104 rr c00505f1 172800 1 e.gtld-servers.net. c00c5e1e
@40000000485fc0f7055b48d4 rr c00505f1 172800 1 f.gtld-servers.net. c023331e
@40000000485fc0f7055b548c rr c00505f1 172800 1 g.gtld-servers.net. c02a5d1e
@40000000485fc0f7055bc1ec rr c00505f1 172800 1 h.gtld-servers.net. c036701e
@40000000485fc0f7055bc9bc rr c00505f1 172800 1 i.gtld-servers.net. c02bac1e
@40000000485fc0f7055bd574 rr c00505f1 172800 1 j.gtld-servers.net. c0304f1e
@40000000485fc0f7055be12c rr c00505f1 172800 1 k.gtld-servers.net. c034b21e
@40000000485fc0f7055be8fc rr c00505f1 172800 1 l.gtld-servers.net. c029a21e
@40000000485fc0f7055bf4b4 rr c00505f1 172800 1 m.gtld-servers.net. c037531e
@40000000485fc0f7055cbbec rr c00505f1 172800 ns net. j.gtld-servers.net.
@40000000485fc0f7055cc7a4 rr c00505f1 172800 ns net. a.gtld-servers.net.
@40000000485fc0f7055cd35c rr c00505f1 172800 ns net. g.gtld-servers.net.
@40000000485fc0f7055cdb2c rr c00505f1 172800 ns net. c.gtld-servers.net.
@40000000485fc0f7055ce6e4 rr c00505f1 172800 ns net. l.gtld-servers.net.
@40000000485fc0f7055cf29c rr c00505f1 172800 ns net. h.gtld-servers.net.
@40000000485fc0f7055d19ac rr c00505f1 172800 ns net. m.gtld-servers.net.
@40000000485fc0f7055d217c rr c00505f1 172800 ns net. f.gtld-servers.net.
@40000000485fc0f7055d582c rr c00505f1 172800 ns net. b.gtld-servers.net.
@40000000485fc0f7055d63e4 rr c00505f1 172800 ns net. e.gtld-servers.net.
@40000000485fc0f7055d6bb4 rr c00505f1 172800 ns net. k.gtld-servers.net.
@40000000485fc0f7055d776c rr c00505f1 172800 ns net. i.gtld-servers.net.
@40000000485fc0f7055d8324 rr c00505f1 172800 ns net. d.gtld-servers.net.
@40000000485fc0f7055d8af4 rr c00505f1 172800 28 a.gtld-servers.net. 20010503a83e00000000000000020030
@40000000485fc0f7055dae1c stats 50900 11338839 1 0
@40000000485fc0f7055db9d4 cached 1 j.gtld-servers.net.
@40000000485fc0f7055dc58c cached 1 a.gtld-servers.net.
@40000000485fc0f7055dcd5c cached 1 g.gtld-servers.net.
@40000000485fc0f7055dd914 cached 1 c.gtld-servers.net.
@40000000485fc0f7055de0e4 cached 1 l.gtld-servers.net.
@40000000485fc0f7055dec9c cached 1 h.gtld-servers.net.
@40000000485fc0f7055df854 cached 1 m.gtld-servers.net.
@40000000485fc0f7055e1794 cached 1 f.gtld-servers.net.
@40000000485fc0f7055e234c cached 1 b.gtld-servers.net.
@40000000485fc0f7055e2f04 cached 1 e.gtld-servers.net.
@40000000485fc0f7055e36d4 cached 1 k.gtld-servers.net.
@40000000485fc0f7055e428c cached 1 i.gtld-servers.net.
@40000000485fc0f7055e4e44 cached 1 d.gtld-servers.net.
@40000000485fc0f7055e5614 tx 1 1 ns-a.pnap.net. net. c02bac1e c01a5c1e c029a21e c023331e c037531e c036701e c02a5d1e c005061e c034b21e c0304f1e c0210e1e c01f501e c00c5e1e
@40000000485fc0f70e7ac3a4 rr c02bac1e 172800 1 ns-a.pnap.net. 405e7b04
@40000000485fc0f70e7ad344 rr c02bac1e 172800 1 ns-a.pnap.net. 405e7b04
@40000000485fc0f70e7adb14 rr c02bac1e 172800 1 ns-b.pnap.net. 405e7b24
@40000000485fc0f70e7ae2e4 rr c02bac1e 172800 1 ns-c.pnap.net. 405f3d04
@40000000485fc0f70e7aee9c rr c02bac1e 172800 1 ns-d.pnap.net. 405f3d24
@40000000485fc0f70e7af66c rr c02bac1e 172800 ns pnap.net. ns-a.pnap.net.
@40000000485fc0f70e7afe3c rr c02bac1e 172800 ns pnap.net. ns-b.pnap.net.
@40000000485fc0f70e7b060c rr c02bac1e 172800 ns pnap.net. ns-c.pnap.net.
@40000000485fc0f70e7b7b3c rr c02bac1e 172800 ns pnap.net. ns-d.pnap.net.
@40000000485fc0f70e7b830c stats 50900 11339099 1 0
@40000000485fc0f70e7b8adc cached 1 ns-b.pnap.net.
@40000000485fc0f70e7b9694 cached 1 ns-c.pnap.net.
@40000000485fc0f70e7b9e64 cached 1 ns-d.pnap.net.
@40000000485fc0f70e7ba634 tx 0 1 feeds.feedburner.com. feedburner.com. 405e7b04 405e7b24 405f3d24 405f3d04
@40000000485fc0f710bb7474 rr 405e7b04 300 1 feeds.feedburner.com. 42966077
@40000000485fc0f710bb8414 rr 405e7b04 86400 ns feedburner.com. ns-d.pnap.net.
@40000000485fc0f710bb8be4 rr 405e7b04 86400 ns feedburner.com. ns-a.pnap.net.
@40000000485fc0f710bb93b4 rr 405e7b04 86400 ns feedburner.com. ns-b.pnap.net.
@40000000485fc0f710bb9b84 rr 405e7b04 86400 ns feedburner.com. ns-c.pnap.net.
@40000000485fc0f710bba73c stats 50900 11339245 1 0
@40000000485fc0f710bbaf0c sent 50900 84





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