[Solved] DNS freakishly slow on Guest network

[trendy]

@diversity

13:56:32.008257 ethertype IPv4, IP (tos 0x0, ttl 64, id 10023, offset 0, flags [none], proto UDP (17), length 57)
    10.4.4.5.44350 > 10.4.0.1.53: 25048+ A? openwrt.org. (29)
13:56:32.008257 IP (tos 0x0, ttl 64, id 10023, offset 0, flags [none], proto UDP (17), length 57)
    10.4.4.5.44350 > 10.4.0.1.53: 25048+ A? openwrt.org. (29)
13:56:32.008257 IP (tos 0x0, ttl 64, id 10023, offset 0, flags [none], proto UDP (17), length 57)
    10.4.4.5.44350 > 10.4.0.1.53: 25048+ A? openwrt.org. (29)
13:56:32.008600 IP (tos 0x0, ttl 64, id 60680, offset 0, flags [DF], proto UDP (17), length 57)
    192.168.178.20.45265 > 1.1.1.1.53: 41502+ A? openwrt.org. (29)
13:56:32.011692 ethertype IPv4, IP (tos 0x0, ttl 60, id 55608, offset 0, flags [DF], proto UDP (17), length 73)
    1.1.1.1.53 > 192.168.178.20.45265: 41502 1/0/0 openwrt.org. A 139.59.209.225 (45)
13:56:32.011692 IP (tos 0x0, ttl 60, id 55608, offset 0, flags [DF], proto UDP (17), length 73)
    1.1.1.1.53 > 192.168.178.20.45265: 41502 1/0/0 openwrt.org. A 139.59.209.225 (45)
13:56:32.011773 IP (tos 0x0, ttl 64, id 42313, offset 0, flags [DF], proto UDP (17), length 73)
    10.4.0.1.53 > 10.4.4.5.44350: 25048 1/0/0 openwrt.org. A 139.59.209.225 (45)

Time difference between first query and first reply is under 1 second.

@diversity

14:00:16.563674 ethertype IPv4, IP (tos 0x0, ttl 128, id 11039, offset 0, flags [none], proto UDP (17), length 61)
    10.4.4.6.59185 > 10.4.0.1.53: 2+ A? openwrt.org.lan. (33)

...

The client is requesting the wrong fqdn. There is a .lan at the end.

@diversity

14:02:02.921513 ethertype IPv4, IP (tos 0x0, ttl 128, id 11223, offset 0, flags [none], proto UDP (17), length 57)
    10.5.4.1.54691 > 10.5.0.1.53: 5+ AAAA? openwrt.org. (29)

The client is asking for IPv6 address.