20190702: dnsmasq の不調

状況

先日 Ubuntu 16.04.6 LTS から 18.04.2 LTS に upgrade して以来、どうも DNS の調子が悪い。
Firefox なんかが頻繁に名前解決で固まるようになった。

起動直後くらいは

nslookup MP990.home 192.168.1.1 # 対ルーター
nslookup MP990.home 127.0.0.53  # localhost の systemd-resolved?
nslookup MP990.home 192.168.1.2 # localhost の dnsmasq
nslookup MP990.home 127.0.0.1   # 同上
nslookup MP990.home             # 同上

とかやるときちんと返事は返ってくるのだが、しばらくすると

$ nslookup MP990.home
Server:		127.0.0.1
Address:	127.0.0.1#53

Name:	MP990.home
Address: 192.168.1.20
;; Got SERVFAIL reply from 127.0.0.1, trying next server
;; connection timed out; no servers could be reached

やら

$ nslookup MP990.home
Server:		127.0.0.1
Address:	127.0.0.1#53

Name:	MP990.home
Address: 192.168.1.20
** server can't find MP990.home: SERVFAIL

やら、

$ nslookup MP990.home
Server:		127.0.0.1
Address:	127.0.0.1#53

Name:	MP990.home
Address: 192.168.1.20
** server can't find MP990.home: NXDOMAIN

やら
下手をすると

$ nslookup MP990.home
;; connection timed out; no servers could be reached

みたいになってしまう上、応答に時間がかかる。

sudo systemctl status dnsmasq

してみると、

 7月 02 23:18:11 HOSTNAME dnsmasq[27549]: Maximum number of concurrent DNS queries reached (max: 150)

みたいなログで埋まっている。
「dnsmasq "Maximum number of concurrent DNS queries reached (max: 150)"」でググってみてもなかなか解決に繋がりそうな情報にたどり着けない。

n-LIFE / 2018-06-22: dnsmasq: Maximum number of concurrent DNS queries reached (max: 150)

とかに、systemd-resolved の 127.0.0.53 宛の DNS のクエリが山のように飛んでたみたいな情報があったので、

tcpdump -vvv -n port 53

とかやってみると、なぜか 127.0.0.53 は出て来ない。

調子が良いときは、nslookup のタイミングで

00:56:19.802935 IP (tos 0x0, ttl 64, id 1624, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.3744 > 192.168.1.1.53: [udp sum ok] 36760+ AAAA? MP990.home. (28)
00:56:19.806332 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.8132 > 192.168.1.2.53: [udp sum ok] 28353+ AAAA? MP990.home. (28)
00:56:19.806480 IP (tos 0x0, ttl 64, id 1625, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.53 > 192.168.1.1.8132: [udp sum ok] 28353* q: AAAA? MP990.home. 0/0/0 (28)
00:56:19.807584 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.53 > 192.168.1.2.3744: [udp sum ok] 36760* q: AAAA? MP990.home. 0/0/0 (28)

みたいなのが1セット飛ぶだけなんだけど、
調子が悪いと、

01:03:01.954400 IP (tos 0x0, ttl 64, id 51294, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.27659 > 192.168.1.1.53: [udp sum ok] 45470+ AAAA? MP990.home. (28)
01:03:01.956406 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.32016 > 192.168.1.2.53: [udp sum ok] 43170+ AAAA? MP990.home. (28)
01:03:01.956501 IP (tos 0x0, ttl 64, id 51295, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.41055 > 192.168.1.1.53: [udp sum ok] 55199+ AAAA? MP990.home. (28)
01:03:01.958599 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.6379 > 192.168.1.2.53: [udp sum ok] 16019+ AAAA? MP990.home. (28)
01:03:01.958684 IP (tos 0x0, ttl 64, id 51296, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.11928 > 192.168.1.1.53: [udp sum ok] 3585+ AAAA? MP990.home. (28)
01:03:01.960847 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.52348 > 192.168.1.2.53: [udp sum ok] 15375+ AAAA? MP990.home. (28)
01:03:01.960912 IP (tos 0x0, ttl 64, id 51297, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.22436 > 192.168.1.1.53: [udp sum ok] 58486+ AAAA? MP990.home. (28)
01:03:01.963072 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.55115 > 192.168.1.2.53: [udp sum ok] 11357+ AAAA? MP990.home. (28)
01:03:01.963192 IP (tos 0x0, ttl 64, id 51298, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.64865 > 192.168.1.1.53: [udp sum ok] 44033+ AAAA? MP990.home. (28)
01:03:01.965280 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.51504 > 192.168.1.2.53: [udp sum ok] 48287+ AAAA? MP990.home. (28)
01:03:01.965377 IP (tos 0x0, ttl 64, id 51299, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.41583 > 192.168.1.1.53: [udp sum ok] 3483+ AAAA? MP990.home. (28)
01:03:01.967470 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.18933 > 192.168.1.2.53: [udp sum ok] 35691+ AAAA? MP990.home. (28)
01:03:01.967592 IP (tos 0x0, ttl 64, id 51300, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.55363 > 192.168.1.1.53: [udp sum ok] 46866+ AAAA? MP990.home. (28)
01:03:01.970087 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.7736 > 192.168.1.2.53: [udp sum ok] 20759+ AAAA? MP990.home. (28)
01:03:01.970232 IP (tos 0x0, ttl 64, id 51301, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.8225 > 192.168.1.1.53: [udp sum ok] 23676+ AAAA? MP990.home. (28)
01:03:01.972969 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.40829 > 192.168.1.2.53: [udp sum ok] 34937+ AAAA? MP990.home. (28)
01:03:01.973052 IP (tos 0x0, ttl 64, id 51302, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.1111 > 192.168.1.1.53: [udp sum ok] 47923+ AAAA? MP990.home. (28)
01:03:01.987746 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.52989 > 192.168.1.2.53: [udp sum ok] 4788+ AAAA? MP990.home. (28)
01:03:01.987838 IP (tos 0x0, ttl 64, id 51305, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.1862 > 192.168.1.1.53: [udp sum ok] 38039+ AAAA? MP990.home. (28)
01:03:01.990596 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.48365 > 192.168.1.2.53: [udp sum ok] 49914+ AAAA? MP990.home. (28)
01:03:01.990693 IP (tos 0x0, ttl 64, id 51306, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.7606 > 192.168.1.1.53: [udp sum ok] 27755+ AAAA? MP990.home. (28)
01:03:01.992907 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.47982 > 192.168.1.2.53: [udp sum ok] 15831+ AAAA? MP990.home. (28)
01:03:01.992995 IP (tos 0x0, ttl 64, id 51307, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.10253 > 192.168.1.1.53: [udp sum ok] 5521+ AAAA? MP990.home. (28)
01:03:01.995141 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.26342 > 192.168.1.2.53: [udp sum ok] 64600+ AAAA? MP990.home. (28)
01:03:01.995236 IP (tos 0x0, ttl 64, id 51308, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.54506 > 192.168.1.1.53: [udp sum ok] 44746+ AAAA? MP990.home. (28)
01:03:01.997377 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.42655 > 192.168.1.2.53: [udp sum ok] 45087+ AAAA? MP990.home. (28)
01:03:01.997467 IP (tos 0x0, ttl 64, id 51309, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.21271 > 192.168.1.1.53: [udp sum ok] 40529+ AAAA? MP990.home. (28)
01:03:01.999630 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.48511 > 192.168.1.2.53: [udp sum ok] 35549+ AAAA? MP990.home. (28)
01:03:01.999722 IP (tos 0x0, ttl 64, id 51310, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.48961 > 192.168.1.1.53: [udp sum ok] 8083+ AAAA? MP990.home. (28)
01:03:02.015867 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.11077 > 192.168.1.2.53: [udp sum ok] 59386+ AAAA? MP990.home. (28)
01:03:02.016019 IP (tos 0x0, ttl 64, id 51313, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.53172 > 192.168.1.1.53: [udp sum ok] 49420+ AAAA? MP990.home. (28)
01:03:02.018306 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.43021 > 192.168.1.2.53: [udp sum ok] 62209+ AAAA? MP990.home. (28)
01:03:02.018446 IP (tos 0x0, ttl 64, id 51314, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.30278 > 192.168.1.1.53: [udp sum ok] 32860+ AAAA? MP990.home. (28)
01:03:02.021522 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.18693 > 192.168.1.2.53: [udp sum ok] 25094+ AAAA? MP990.home. (28)
01:03:02.021629 IP (tos 0x0, ttl 64, id 51315, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.53322 > 192.168.1.1.53: [udp sum ok] 56059+ AAAA? MP990.home. (28)
01:03:02.035830 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.46469 > 192.168.1.2.53: [udp sum ok] 31400+ AAAA? MP990.home. (28)
01:03:02.035922 IP (tos 0x0, ttl 64, id 51318, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.16331 > 192.168.1.1.53: [udp sum ok] 1948+ AAAA? MP990.home. (28)
01:03:02.038283 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.48757 > 192.168.1.2.53: [udp sum ok] 59042+ AAAA? MP990.home. (28)
01:03:02.038370 IP (tos 0x0, ttl 64, id 51319, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.45262 > 192.168.1.1.53: [udp sum ok] 4464+ AAAA? MP990.home. (28)
01:03:02.040809 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.47794 > 192.168.1.2.53: [udp sum ok] 24048+ AAAA? MP990.home. (28)
01:03:02.040912 IP (tos 0x0, ttl 64, id 51320, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.12628 > 192.168.1.1.53: [udp sum ok] 55445+ AAAA? MP990.home. (28)
01:03:02.043130 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.6204 > 192.168.1.2.53: [udp sum ok] 22726+ AAAA? MP990.home. (28)
01:03:02.043265 IP (tos 0x0, ttl 64, id 51321, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.34024 > 192.168.1.1.53: [udp sum ok] 37935+ AAAA? MP990.home. (28)
01:03:02.045367 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.49485 > 192.168.1.2.53: [udp sum ok] 54728+ AAAA? MP990.home. (28)
01:03:02.045482 IP (tos 0x0, ttl 64, id 51322, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.8722 > 192.168.1.1.53: [udp sum ok] 45758+ AAAA? MP990.home. (28)
01:03:02.047702 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.30129 > 192.168.1.2.53: [udp sum ok] 55477+ AAAA? MP990.home. (28)
01:03:02.047822 IP (tos 0x0, ttl 64, id 51323, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.41914 > 192.168.1.1.53: [udp sum ok] 54568+ AAAA? MP990.home. (28)
01:03:02.049956 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.6729 > 192.168.1.2.53: [udp sum ok] 12779+ AAAA? MP990.home. (28)
01:03:02.050062 IP (tos 0x0, ttl 64, id 51324, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.19324 > 192.168.1.1.53: [udp sum ok] 46387+ AAAA? MP990.home. (28)
01:03:02.064423 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.9157 > 192.168.1.2.53: [udp sum ok] 5582+ AAAA? MP990.home. (28)
01:03:02.064591 IP (tos 0x0, ttl 64, id 51326, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.22535 > 192.168.1.1.53: [udp sum ok] 18423+ AAAA? MP990.home. (28)
01:03:02.066944 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.27413 > 192.168.1.2.53: [udp sum ok] 37094+ AAAA? MP990.home. (28)
01:03:02.067085 IP (tos 0x0, ttl 64, id 51327, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.28453 > 192.168.1.1.53: [udp sum ok] 33557+ AAAA? MP990.home. (28)
01:03:02.069467 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.42159 > 192.168.1.2.53: [udp sum ok] 39140+ AAAA? MP990.home. (28)
01:03:02.069607 IP (tos 0x0, ttl 64, id 51328, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.16796 > 192.168.1.1.53: [udp sum ok] 7852+ AAAA? MP990.home. (28)
01:03:02.083879 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.24691 > 192.168.1.2.53: [udp sum ok] 41756+ AAAA? MP990.home. (28)
01:03:02.084035 IP (tos 0x0, ttl 64, id 51329, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.30944 > 192.168.1.1.53: [udp sum ok] 46963+ AAAA? MP990.home. (28)
01:03:02.086467 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.17769 > 192.168.1.2.53: [udp sum ok] 7279+ AAAA? MP990.home. (28)
01:03:02.086626 IP (tos 0x0, ttl 64, id 51330, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.43908 > 192.168.1.1.53: [udp sum ok] 56613+ AAAA? MP990.home. (28)
01:03:02.089031 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.7129 > 192.168.1.2.53: [udp sum ok] 61203+ AAAA? MP990.home. (28)
01:03:02.089210 IP (tos 0x0, ttl 64, id 51331, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.14610 > 192.168.1.1.53: [udp sum ok] 50122+ AAAA? MP990.home. (28)
01:03:02.097363 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.63877 > 192.168.1.2.53: [udp sum ok] 10847+ AAAA? MP990.home. (28)
01:03:02.097496 IP (tos 0x0, ttl 64, id 51333, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.53329 > 192.168.1.1.53: [udp sum ok] 11886+ AAAA? MP990.home. (28)
01:03:02.099510 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.41941 > 192.168.1.2.53: [udp sum ok] 38150+ AAAA? MP990.home. (28)
01:03:02.099631 IP (tos 0x0, ttl 64, id 51334, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.34120 > 192.168.1.1.53: [udp sum ok] 17243+ AAAA? MP990.home. (28)
01:03:02.102108 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.10015 > 192.168.1.2.53: [udp sum ok] 5034+ AAAA? MP990.home. (28)
01:03:02.102228 IP (tos 0x0, ttl 64, id 51335, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.11482 > 192.168.1.1.53: [udp sum ok] 27187+ AAAA? MP990.home. (28)
01:03:02.105059 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.10541 > 192.168.1.2.53: [udp sum ok] 10875+ AAAA? MP990.home. (28)
01:03:02.105201 IP (tos 0x0, ttl 64, id 51336, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.32181 > 192.168.1.1.53: [udp sum ok] 5030+ AAAA? MP990.home. (28)
01:03:02.107594 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.40924 > 192.168.1.2.53: [udp sum ok] 46773+ AAAA? MP990.home. (28)
01:03:02.107709 IP (tos 0x0, ttl 64, id 51337, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.45533 > 192.168.1.1.53: [udp sum ok] 14637+ AAAA? MP990.home. (28)
01:03:02.110377 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.9963 > 192.168.1.2.53: [udp sum ok] 40335+ AAAA? MP990.home. (28)
01:03:02.110511 IP (tos 0x0, ttl 64, id 51338, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.4948 > 192.168.1.1.53: [udp sum ok] 64664+ AAAA? MP990.home. (28)
01:03:02.112757 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.35528 > 192.168.1.2.53: [udp sum ok] 29128+ AAAA? MP990.home. (28)
01:03:02.112875 IP (tos 0x0, ttl 64, id 51339, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.21705 > 192.168.1.1.53: [udp sum ok] 21980+ AAAA? MP990.home. (28)
01:03:02.115978 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.25069 > 192.168.1.2.53: [udp sum ok] 47449+ AAAA? MP990.home. (28)
01:03:02.116097 IP (tos 0x0, ttl 64, id 51340, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.19407 > 192.168.1.1.53: [udp sum ok] 4860+ AAAA? MP990.home. (28)
01:03:02.118215 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.6693 > 192.168.1.2.53: [udp sum ok] 53657+ AAAA? MP990.home. (28)
01:03:02.118353 IP (tos 0x0, ttl 64, id 51341, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.62080 > 192.168.1.1.53: [udp sum ok] 12060+ AAAA? MP990.home. (28)
01:03:02.120531 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.65240 > 192.168.1.2.53: [udp sum ok] 13798+ AAAA? MP990.home. (28)
01:03:02.120665 IP (tos 0x0, ttl 64, id 51342, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.18903 > 192.168.1.1.53: [udp sum ok] 56337+ AAAA? MP990.home. (28)
01:03:02.123112 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.56893 > 192.168.1.2.53: [udp sum ok] 57387+ AAAA? MP990.home. (28)
01:03:02.123243 IP (tos 0x0, ttl 64, id 51343, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.59330 > 192.168.1.1.53: [udp sum ok] 53604+ AAAA? MP990.home. (28)
01:03:02.125701 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.36991 > 192.168.1.2.53: [udp sum ok] 15117+ AAAA? MP990.home. (28)
01:03:02.125820 IP (tos 0x0, ttl 64, id 51344, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.2527 > 192.168.1.1.53: [udp sum ok] 12968+ AAAA? MP990.home. (28)
01:03:02.128035 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.62874 > 192.168.1.2.53: [udp sum ok] 21516+ AAAA? MP990.home. (28)
01:03:02.128157 IP (tos 0x0, ttl 64, id 51345, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.12696 > 192.168.1.1.53: [udp sum ok] 42143+ AAAA? MP990.home. (28)
01:03:02.130270 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.34796 > 192.168.1.2.53: [udp sum ok] 49683+ AAAA? MP990.home. (28)
01:03:02.130438 IP (tos 0x0, ttl 64, id 51346, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.42752 > 192.168.1.1.53: [udp sum ok] 33473+ AAAA? MP990.home. (28)
01:03:02.134159 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.51350 > 192.168.1.2.53: [udp sum ok] 3108+ AAAA? MP990.home. (28)
01:03:02.134334 IP (tos 0x0, ttl 64, id 51347, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.63140 > 192.168.1.1.53: [udp sum ok] 12548+ AAAA? MP990.home. (28)
01:03:02.136800 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.19955 > 192.168.1.2.53: [udp sum ok] 29925+ AAAA? MP990.home. (28)
01:03:02.136974 IP (tos 0x0, ttl 64, id 51348, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.41078 > 192.168.1.1.53: [udp sum ok] 26182+ AAAA? MP990.home. (28)
01:03:02.139405 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.8540 > 192.168.1.2.53: [udp sum ok] 37691+ AAAA? MP990.home. (28)
01:03:02.139537 IP (tos 0x0, ttl 64, id 51349, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.54991 > 192.168.1.1.53: [udp sum ok] 59439+ AAAA? MP990.home. (28)
01:03:02.141811 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.48726 > 192.168.1.2.53: [udp sum ok] 49897+ AAAA? MP990.home. (28)
01:03:02.141925 IP (tos 0x0, ttl 64, id 51350, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.49821 > 192.168.1.1.53: [udp sum ok] 29790+ AAAA? MP990.home. (28)
01:03:02.141996 IP (tos 0x0, ttl 64, id 51351, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.53 > 192.168.1.1.48726: [udp sum ok] 49897* q: AAAA? MP990.home. 0/0/0 (28)
01:03:02.144316 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.53 > 192.168.1.2.54991: [udp sum ok] 59439* q: AAAA? MP990.home. 0/0/0 (28)
01:03:02.144390 IP (tos 0x0, ttl 64, id 51352, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.53 > 192.168.1.1.8540: [udp sum ok] 37691* q: AAAA? MP990.home. 0/0/0 (28)
01:03:02.145777 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.7236 > 192.168.1.2.53: [udp sum ok] 6556+ AAAA? MP990.home. (28)
01:03:02.145868 IP (tos 0x0, ttl 64, id 51353, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.5058 > 192.168.1.1.53: [udp sum ok] 24729+ AAAA? MP990.home. (28)
01:03:02.147681 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.53 > 192.168.1.2.41078: [udp sum ok] 26182* q: AAAA? MP990.home. 0/0/0 (28)
01:03:02.147745 IP (tos 0x0, ttl 64, id 51354, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.53 > 192.168.1.1.19955: [udp sum ok] 29925* q: AAAA? MP990.home. 0/0/0 (28)
01:03:02.149126 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.59329 > 192.168.1.2.53: [udp sum ok] 41268+ AAAA? MP990.home. (28)
01:03:02.149226 IP (tos 0x0, ttl 64, id 51355, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.28825 > 192.168.1.1.53: [udp sum ok] 22747+ AAAA? MP990.home. (28)
01:03:02.152132 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.53 > 192.168.1.2.63140: [udp sum ok] 12548* q: AAAA? MP990.home. 0/0/0 (28)
01:03:02.152235 IP (tos 0x0, ttl 64, id 51356, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.53 > 192.168.1.1.51350: [udp sum ok] 3108* q: AAAA? MP990.home. 0/0/0 (28)
01:03:02.153595 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.22067 > 192.168.1.2.53: [udp sum ok] 30160+ AAAA? MP990.home. (28)
01:03:02.153733 IP (tos 0x0, ttl 64, id 51357, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.58275 > 192.168.1.1.53: [udp sum ok] 25840+ AAAA? MP990.home. (28)
01:03:02.155508 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.53 > 192.168.1.2.42752: [udp sum ok] 33473* q: AAAA? MP990.home. 0/0/0 (28)
01:03:02.155615 IP (tos 0x0, ttl 64, id 51358, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.53 > 192.168.1.1.34796: [udp sum ok] 49683* q: AAAA? MP990.home. 0/0/0 (28)
01:03:02.157002 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.65288 > 192.168.1.2.53: [udp sum ok] 57293+ AAAA? MP990.home. (28)
01:03:02.157184 IP (tos 0x0, ttl 64, id 51359, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.13706 > 192.168.1.1.53: [udp sum ok] 1086+ AAAA? MP990.home. (28)
01:03:02.159600 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.53 > 192.168.1.2.12696: [udp sum ok] 42143* q: AAAA? MP990.home. 0/0/0 (28)
01:03:02.159701 IP (tos 0x0, ttl 64, id 51360, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.53 > 192.168.1.1.62874: [udp sum ok] 21516* q: AAAA? MP990.home. 0/0/0 (28)
01:03:02.161072 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.45206 > 192.168.1.2.53: [udp sum ok] 45595+ AAAA? MP990.home. (28)
01:03:02.161241 IP (tos 0x0, ttl 64, id 51361, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.55735 > 192.168.1.1.53: [udp sum ok] 16552+ AAAA? MP990.home. (28)
01:03:02.163010 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.53 > 192.168.1.2.2527: [udp sum ok] 12968* q: AAAA? MP990.home. 0/0/0 (28)
01:03:02.163113 IP (tos 0x0, ttl 64, id 51362, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.53 > 192.168.1.1.36991: [udp sum ok] 15117* q: AAAA? MP990.home. 0/0/0 (28)
01:03:02.164986 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.39717 > 192.168.1.2.53: [udp sum ok] 12822+ AAAA? MP990.home. (28)
01:03:02.165119 IP (tos 0x0, ttl 64, id 51363, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.56185 > 192.168.1.1.53: [udp sum ok] 26862+ AAAA? MP990.home. (28)
01:03:02.166856 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.53 > 192.168.1.2.59330: [udp sum ok] 53604* q: AAAA? MP990.home. 0/0/0 (28)
01:03:02.166961 IP (tos 0x0, ttl 64, id 51364, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.53 > 192.168.1.1.56893: [udp sum ok] 57387* q: AAAA? MP990.home. 0/0/0 (28)
01:03:02.168345 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.32621 > 192.168.1.2.53: [udp sum ok] 33899+ AAAA? MP990.home. (28)
01:03:02.168487 IP (tos 0x0, ttl 64, id 51365, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.55495 > 192.168.1.1.53: [udp sum ok] 33923+ AAAA? MP990.home. (28)
01:03:02.170208 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.53 > 192.168.1.2.18903: [udp sum ok] 56337* q: AAAA? MP990.home. 0/0/0 (28)
01:03:02.170312 IP (tos 0x0, ttl 64, id 51366, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.53 > 192.168.1.1.65240: [udp sum ok] 13798* q: AAAA? MP990.home. 0/0/0 (28)
01:03:02.172196 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.31751 > 192.168.1.2.53: [udp sum ok] 27421+ AAAA? MP990.home. (28)
01:03:02.172359 IP (tos 0x0, ttl 64, id 51367, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.1728 > 192.168.1.1.53: [udp sum ok] 44294+ AAAA? MP990.home. (28)
01:03:02.174268 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.53 > 192.168.1.2.62080: [udp sum ok] 12060* q: AAAA? MP990.home. 0/0/0 (28)
01:03:02.174378 IP (tos 0x0, ttl 64, id 51368, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.53 > 192.168.1.1.6693: [udp sum ok] 53657* q: AAAA? MP990.home. 0/0/0 (28)
01:03:02.175764 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.48539 > 192.168.1.2.53: [udp sum ok] 11978+ AAAA? MP990.home. (28)
01:03:02.175951 IP (tos 0x0, ttl 64, id 51369, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.18088 > 192.168.1.1.53: [udp sum ok] 14335+ AAAA? MP990.home. (28)
01:03:02.177668 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.53 > 192.168.1.2.19407: [udp sum ok] 4860* q: AAAA? MP990.home. 0/0/0 (28)
01:03:02.177799 IP (tos 0x0, ttl 64, id 51370, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.53 > 192.168.1.1.25069: [udp sum ok] 47449* q: AAAA? MP990.home. 0/0/0 (28)
01:03:02.179174 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.39495 > 192.168.1.2.53: [udp sum ok] 56742+ AAAA? MP990.home. (28)
01:03:02.179350 IP (tos 0x0, ttl 64, id 51371, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.43173 > 192.168.1.1.53: [udp sum ok] 28583+ AAAA? MP990.home. (28)
01:03:02.181060 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.53 > 192.168.1.2.21705: [udp sum ok] 21980* q: AAAA? MP990.home. 0/0/0 (28)
01:03:02.181132 IP (tos 0x0, ttl 64, id 51372, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.53 > 192.168.1.1.35528: [udp sum ok] 29128* q: AAAA? MP990.home. 0/0/0 (28)
01:03:02.182593 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.46890 > 192.168.1.2.53: [udp sum ok] 33877+ AAAA? MP990.home. (28)
01:03:02.182685 IP (tos 0x0, ttl 64, id 51373, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.26796 > 192.168.1.1.53: [udp sum ok] 36521+ AAAA? MP990.home. (28)
01:03:02.184999 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.53 > 192.168.1.2.4948: [udp sum ok] 64664* q: AAAA? MP990.home. 0/0/0 (28)
01:03:02.185065 IP (tos 0x0, ttl 64, id 51374, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.53 > 192.168.1.1.9963: [udp sum ok] 40335* q: AAAA? MP990.home. 0/0/0 (28)
01:03:02.186499 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.42985 > 192.168.1.2.53: [udp sum ok] 62291+ AAAA? MP990.home. (28)
01:03:02.186590 IP (tos 0x0, ttl 64, id 51375, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.23429 > 192.168.1.1.53: [udp sum ok] 56497+ AAAA? MP990.home. (28)
01:03:02.188418 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.53 > 192.168.1.2.45533: [udp sum ok] 14637* q: AAAA? MP990.home. 0/0/0 (28)
01:03:02.188487 IP (tos 0x0, ttl 64, id 51376, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.53 > 192.168.1.1.40924: [udp sum ok] 46773* q: AAAA? MP990.home. 0/0/0 (28)
01:03:02.189734 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.32681 > 192.168.1.2.53: [udp sum ok] 20704+ AAAA? MP990.home. (28)
01:03:02.189821 IP (tos 0x0, ttl 64, id 51377, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.33150 > 192.168.1.1.53: [udp sum ok] 59487+ AAAA? MP990.home. (28)
01:03:02.191118 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.53 > 192.168.1.2.32181: [udp sum ok] 5030* q: AAAA? MP990.home. 0/0/0 (28)
01:03:02.191210 IP (tos 0x0, ttl 64, id 51378, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.53 > 192.168.1.1.10541: [udp sum ok] 10875* q: AAAA? MP990.home. 0/0/0 (28)
01:03:02.192649 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.64396 > 192.168.1.2.53: [udp sum ok] 50940+ AAAA? MP990.home. (28)
01:03:02.192790 IP (tos 0x0, ttl 64, id 51379, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.25207 > 192.168.1.1.53: [udp sum ok] 58218+ AAAA? MP990.home. (28)
01:03:02.194525 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.53 > 192.168.1.2.11482: [udp sum ok] 27187* q: AAAA? MP990.home. 0/0/0 (28)
01:03:02.194624 IP (tos 0x0, ttl 64, id 51380, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.53 > 192.168.1.1.10015: [udp sum ok] 5034* q: AAAA? MP990.home. 0/0/0 (28)
01:03:02.196020 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.41301 > 192.168.1.2.53: [udp sum ok] 29222+ AAAA? MP990.home. (28)
01:03:02.196156 IP (tos 0x0, ttl 64, id 51381, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.25462 > 192.168.1.1.53: [udp sum ok] 16773+ AAAA? MP990.home. (28)
01:03:02.197880 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.53 > 192.168.1.2.34120: [udp sum ok] 17243* q: AAAA? MP990.home. 0/0/0 (28)
01:03:02.197977 IP (tos 0x0, ttl 64, id 51382, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.53 > 192.168.1.1.41941: [udp sum ok] 38150* q: AAAA? MP990.home. 0/0/0 (28)
01:03:02.199376 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.41778 > 192.168.1.2.53: [udp sum ok] 35587+ AAAA? MP990.home. (28)
01:03:02.199511 IP (tos 0x0, ttl 64, id 51383, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.62707 > 192.168.1.1.53: [udp sum ok] 56611+ AAAA? MP990.home. (28)
01:03:02.201293 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.53 > 192.168.1.2.53329: [udp sum ok] 11886* q: AAAA? MP990.home. 0/0/0 (28)
01:03:02.201404 IP (tos 0x0, ttl 64, id 51384, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.53 > 192.168.1.1.63877: [udp sum ok] 10847* q: AAAA? MP990.home. 0/0/0 (28)
01:03:02.202772 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.17319 > 192.168.1.2.53: [udp sum ok] 30538+ AAAA? MP990.home. (28)
01:03:02.202906 IP (tos 0x0, ttl 64, id 51385, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.18872 > 192.168.1.1.53: [udp sum ok] 58142+ AAAA? MP990.home. (28)
01:03:02.205038 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.53 > 192.168.1.2.14610: [udp sum ok] 50122* q: AAAA? MP990.home. 0/0/0 (28)
01:03:02.205134 IP (tos 0x0, ttl 64, id 51386, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.53 > 192.168.1.1.7129: [udp sum ok] 61203* q: AAAA? MP990.home. 0/0/0 (28)
01:03:02.206576 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.7162 > 192.168.1.2.53: [udp sum ok] 23571+ AAAA? MP990.home. (28)
01:03:02.206707 IP (tos 0x0, ttl 64, id 51387, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.46405 > 192.168.1.1.53: [udp sum ok] 45452+ AAAA? MP990.home. (28)
01:03:02.208332 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.53 > 192.168.1.2.43908: [udp sum ok] 56613* q: AAAA? MP990.home. 0/0/0 (28)
01:03:02.208431 IP (tos 0x0, ttl 64, id 51388, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.53 > 192.168.1.1.17769: [udp sum ok] 7279* q: AAAA? MP990.home. 0/0/0 (28)
01:03:02.209791 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.21328 > 192.168.1.2.53: [udp sum ok] 27387+ AAAA? MP990.home. (28)
01:03:02.209923 IP (tos 0x0, ttl 64, id 51389, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.9546 > 192.168.1.1.53: [udp sum ok] 27623+ AAAA? MP990.home. (28)
01:03:02.211955 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.53 > 192.168.1.2.30944: [udp sum ok] 46963* q: AAAA? MP990.home. 0/0/0 (28)
01:03:02.212077 IP (tos 0x0, ttl 64, id 51390, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.53 > 192.168.1.1.24691: [udp sum ok] 41756* q: AAAA? MP990.home. 0/0/0 (28)
01:03:02.213704 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.13447 > 192.168.1.2.53: [udp sum ok] 54451+ AAAA? MP990.home. (28)
01:03:02.213799 IP (tos 0x0, ttl 64, id 51391, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.18402 > 192.168.1.1.53: [udp sum ok] 6737+ AAAA? MP990.home. (28)
01:03:02.215372 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.53 > 192.168.1.2.16796: [udp sum ok] 7852* q: AAAA? MP990.home. 0/0/0 (28)
01:03:02.215441 IP (tos 0x0, ttl 64, id 51392, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.53 > 192.168.1.1.42159: [udp sum ok] 39140* q: AAAA? MP990.home. 0/0/0 (28)
01:03:02.217835 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.7737 > 192.168.1.2.53: [udp sum ok] 54535+ AAAA? MP990.home. (28)
01:03:02.217923 IP (tos 0x0, ttl 64, id 51393, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.33564 > 192.168.1.1.53: [udp sum ok] 56686+ AAAA? MP990.home. (28)
01:03:02.219443 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.53 > 192.168.1.2.28453: [udp sum ok] 33557* q: AAAA? MP990.home. 0/0/0 (28)
01:03:02.219512 IP (tos 0x0, ttl 64, id 51394, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.53 > 192.168.1.1.27413: [udp sum ok] 37094* q: AAAA? MP990.home. 0/0/0 (28)
01:03:02.221193 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.28899 > 192.168.1.2.53: [udp sum ok] 41164+ AAAA? MP990.home. (28)
01:03:02.221315 IP (tos 0x0, ttl 64, id 51395, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.2803 > 192.168.1.1.53: [udp sum ok] 29143+ AAAA? MP990.home. (28)
01:03:02.222994 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.53 > 192.168.1.2.22535: [udp sum ok] 18423* q: AAAA? MP990.home. 0/0/0 (28)
01:03:02.223061 IP (tos 0x0, ttl 64, id 51396, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.53 > 192.168.1.1.9157: [udp sum ok] 5582* q: AAAA? MP990.home. 0/0/0 (28)
01:03:02.225165 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.9049 > 192.168.1.2.53: [udp sum ok] 28358+ AAAA? MP990.home. (28)
01:03:02.225256 IP (tos 0x0, ttl 64, id 51397, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.41591 > 192.168.1.1.53: [udp sum ok] 36762+ AAAA? MP990.home. (28)
01:03:02.226724 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.53 > 192.168.1.2.19324: [udp sum ok] 46387* q: AAAA? MP990.home. 0/0/0 (28)
01:03:02.226772 IP (tos 0x0, ttl 64, id 51398, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.53 > 192.168.1.1.6729: [udp sum ok] 12779* q: AAAA? MP990.home. 0/0/0 (28)
01:03:02.228464 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.46337 > 192.168.1.2.53: [udp sum ok] 48650+ AAAA? MP990.home. (28)
01:03:02.228547 IP (tos 0x0, ttl 64, id 51399, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.55010 > 192.168.1.1.53: [udp sum ok] 57413+ AAAA? MP990.home. (28)
01:03:02.230038 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.53 > 192.168.1.2.41914: [udp sum ok] 54568* q: AAAA? MP990.home. 0/0/0 (28)
01:03:02.230099 IP (tos 0x0, ttl 64, id 51400, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.53 > 192.168.1.1.30129: [udp sum ok] 55477* q: AAAA? MP990.home. 0/0/0 (28)
01:03:02.231835 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.45857 > 192.168.1.2.53: [udp sum ok] 45589+ AAAA? MP990.home. (28)
01:03:02.231908 IP (tos 0x0, ttl 64, id 51401, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.50451 > 192.168.1.1.53: [udp sum ok] 2373+ AAAA? MP990.home. (28)
01:03:02.233647 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.1.53 > 192.168.1.2.8722: [udp sum ok] 45758* q: AAAA? MP990.home. 0/0/0 (28)
01:03:02.233708 IP (tos 0x0, ttl 64, id 51402, offset 0, flags [DF], proto UDP (17), length 56)
    192.168.1.2.53 > 192.168.1.1.49485: [udp sum ok] 54728* q: AAAA? MP990.home. 0/0/0 (28)
...

みたいな洪水が起こる。
他にも

00:29:05.830172 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 131)
    192.168.1.1.53 > 192.168.1.2.7370: [udp sum ok] 29694 NXDomain q: AAAA? MP990.home. 0/1/0 ns: . [1h34m24s] SOA a.root-servers.net. nstld.verisign-grs.com. 2019070200 1800 900 604800 86400 (103)

みたいなのも見られる。

192.168.1.1 はルーターの NTT PR-400KI で、192.168.1.2 が問題の Ubuntu。
ルーターからは *.home を 192.168.1.2 へ問い合わせるよう16進表現したIPv4射影アドレスを設定してある。
これは、ルーターの DHCP が MAC アドレス指定出来ないうんこで IP の静的貸出し出来ないため、192.168.1.2 でローカルネットを定期的にスキャンすることで hosts ファイルを自動生成し dnsmasq 食わせることで、ローカルな DynamicDNS 的な事を無理やりやってるからなんだけど、どうも症状的に見て、192.168.1.1 と 192.168.1.2 が互いに *.home 問い合わせあっているのが原因のように思えてきた。
前はこれで安定していたのだが、*.home の dns は docker か何かに追い出すべきだろうか？

暫定処置

いろいろ試行錯誤した結果、
どうも systemd-resolved がクエリ増殖に関わってそうな雰囲気があったので
systemd-resolved の停止

sudo systemctl disable systemd-resolved
sudo systemctl stop systemd-resolved
sudo rm /run/resolvconf/interface/systemd-resolved

/etc/resolvconf/resolv.conf.d/original の書き換え

# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
#     DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
nameserver 127.0.1.1
search flets-west.jp iptvf.jp

↓

# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
#     DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
nameserver 192.168.1.1
search home ntt-west.ne.jp flets-west.jp iptvf.jp

networking と dnsmasq の再起動

sudo systemctl restart networking
sudo systemctl restart dnsmasq

くらいまでしたら、ようやく症状が落ち着いたような気がする。
しかし、

scanimage -L

ってすると一過性ではあるが tcpdump で MP990.home のバーストが起こった。
むぅ。
一応落ち着いてはいるので、とりあえずこれで様子を見るしかないが、これ大丈夫か？

追記: 20190704
落ち着いてるとか、全く気のせいだった。
この構成駄目かも。

続き

20191029: localdns, 解決!!!

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