toaruScar
Regular Contributor
Maybe you meant to say that the "yourname" part of the "yourname.myname.com" is a PQDN? Becasue "yourname.myname.com" ends in "com" TLD and you can do a proper dns lookup on it.
If you are to resolve "myname.asuscomm.com", first you go to root name server. It points you to the name server for ".com" (a.gtld-servers.net.) alone with the IP address with it. Then you go to a.gtld-servers.net to ask about asuscomm.com, it then tells you that asuscomm.com has been delegated to ns1.asuscomm.com. Then you go to ns1.asuscomm.com to get your final answer. As shown below.
The root name servers only answer for queries for TLDs, they don't have any knowledge regarding asuscomm.com. So there's no "allow" to begin with.which assumes asuscomm.com does not allow myname.asuscomm.com to exist on root.
If you are to resolve "myname.asuscomm.com", first you go to root name server. It points you to the name server for ".com" (a.gtld-servers.net.) alone with the IP address with it. Then you go to a.gtld-servers.net to ask about asuscomm.com, it then tells you that asuscomm.com has been delegated to ns1.asuscomm.com. Then you go to ns1.asuscomm.com to get your final answer. As shown below.
Code:
dig +trace +additional myname.asuscomm.com
; <<>> DiG 9.10.6 <<>> +trace +additional myname.asuscomm.com
;; global options: +cmd
. 402681 IN NS i.root-servers.net.
. 402681 IN NS m.root-servers.net.
. 402681 IN NS h.root-servers.net.
. 402681 IN NS e.root-servers.net.
. 402681 IN NS b.root-servers.net.
. 402681 IN NS d.root-servers.net.
. 402681 IN NS k.root-servers.net.
. 402681 IN NS f.root-servers.net.
. 402681 IN NS j.root-servers.net.
. 402681 IN NS c.root-servers.net.
. 402681 IN NS a.root-servers.net.
. 402681 IN NS g.root-servers.net.
. 402681 IN NS l.root-servers.net.
. 434820 IN RRSIG NS 8 0 518400 20211011170000 20210928160000 26838 . m3tJoQFhfGlQ8ShQao2SgWWeVUvSQjgYYOOeh8ZW3Yp40hkgEtc/vfAu UUywjfgZxUS+cnFNhR6/Na+bJkdPwOTWAcwG9hJ0EyHgXuB8WsVuYfz7 O3O+5rp0R0KgMwqr7XvWtnjrEZE0oNUJ0x5yTxYFEC/GpwwEv2PGO6Uz j216PvS46EmgrdhnriSsHWmpgoVEQocacvdum72TUhB1O+rKEBNeKigz Nb2vpiK/O3Q/6WRWdpeBGxPunuoPfBXzxktuf7YwhIvlR5epIqDdSI7u jYRjt+WtFg5dbcbuY2e/0pPVHPPNE7mMmPf6Kp5WQlIWlYvPOA2MaQaE mkFcyw==
;; Received 537 bytes from 66.253.214.16#53(66.253.214.16) in 3 ms
com. 172800 IN NS a.gtld-servers.net.
com. 172800 IN NS b.gtld-servers.net.
com. 172800 IN NS c.gtld-servers.net.
com. 172800 IN NS d.gtld-servers.net.
com. 172800 IN NS e.gtld-servers.net.
com. 172800 IN NS f.gtld-servers.net.
com. 172800 IN NS g.gtld-servers.net.
com. 172800 IN NS h.gtld-servers.net.
com. 172800 IN NS i.gtld-servers.net.
com. 172800 IN NS j.gtld-servers.net.
com. 172800 IN NS k.gtld-servers.net.
com. 172800 IN NS l.gtld-servers.net.
com. 172800 IN NS m.gtld-servers.net.
com. 86400 IN DS 30909 8 2 E2D3C916F6DEEAC73294E8268FB5885044A833FC5459588F4A9184CF C41A5766
com. 86400 IN RRSIG DS 8 1 86400 20211012170000 20210929160000 26838 . M1Yhs89LAi3ydnaZmVzP/TkIf1RGlCM8lv5wqXV60Bm3WSCG9zDQdoif vj4WfY00I0FGJYjmaXgk57lHX/QGdABACWSnz7hN9RPCuKRMdAMC7pj1 H4ivxRKz26unnzPzXE41BKOcx4HtPVdF2Dc8EJIMl4C32ykYfutMmJdY 8zDWlII7U9Sdu9e3P6BhS9vzo4UxR/W5JCtgl3rML/dwEdEpVc/qE8mZ +P65jiYPbaYDZclnLJV7HgTvMMp3lmvVN3KnU1jqjbqIjAQks9tj7qob fJmPE8Y0kI5IBoqIBRTCBgkf2i1pQ92qo9kH3fGcOHbElMA+2NZLPXf/ GrXAnQ==
a.gtld-servers.net. 172800 IN A 192.5.6.30
a.gtld-servers.net. 172800 IN AAAA 2001:503:a83e::2:30
b.gtld-servers.net. 172800 IN A 192.33.14.30
b.gtld-servers.net. 172800 IN AAAA 2001:503:231d::2:30
c.gtld-servers.net. 172800 IN A 192.26.92.30
c.gtld-servers.net. 172800 IN AAAA 2001:503:83eb::30
d.gtld-servers.net. 172800 IN A 192.31.80.30
d.gtld-servers.net. 172800 IN AAAA 2001:500:856e::30
e.gtld-servers.net. 172800 IN A 192.12.94.30
e.gtld-servers.net. 172800 IN AAAA 2001:502:1ca1::30
f.gtld-servers.net. 172800 IN A 192.35.51.30
f.gtld-servers.net. 172800 IN AAAA 2001:503:d414::30
g.gtld-servers.net. 172800 IN A 192.42.93.30
g.gtld-servers.net. 172800 IN AAAA 2001:503:eea3::30
h.gtld-servers.net. 172800 IN A 192.54.112.30
h.gtld-servers.net. 172800 IN AAAA 2001:502:8cc::30
i.gtld-servers.net. 172800 IN A 192.43.172.30
i.gtld-servers.net. 172800 IN AAAA 2001:503:39c1::30
j.gtld-servers.net. 172800 IN A 192.48.79.30
j.gtld-servers.net. 172800 IN AAAA 2001:502:7094::30
k.gtld-servers.net. 172800 IN A 192.52.178.30
k.gtld-servers.net. 172800 IN AAAA 2001:503:d2d::30
l.gtld-servers.net. 172800 IN A 192.41.162.30
l.gtld-servers.net. 172800 IN AAAA 2001:500:d937::30
m.gtld-servers.net. 172800 IN A 192.55.83.30
m.gtld-servers.net. 172800 IN AAAA 2001:501:b1f9::30
;; Received 1179 bytes from 199.9.14.201#53(b.root-servers.net) in 31 ms
asuscomm.com. 172800 IN NS ns1.asuscomm.com.
asuscomm.com. 172800 IN NS ns2.asuscomm.com.
CK0POJMG874LJREF7EFN8430QVIT8BSM.com. 86400 IN NSEC3 1 1 0 - CK0Q1GIN43N1ARRC9OSM6QPQR81H5M9A NS SOA RRSIG DNSKEY NSEC3PARAM
CK0POJMG874LJREF7EFN8430QVIT8BSM.com. 86400 IN RRSIG NSEC3 8 2 86400 20211003042352 20210926031352 39343 com. fdKztlvTFtfJm793/ER3F5+kzv7I1SUP3+JqqHCbk5HotOwsZeqzU4U4 DqkanSWZkzl2rC4qL8Q02oo6F53HSZgaVXEzCAcRRj2gRIlhCsL+0iQx X7SLPer7CVmSf1Fm9DL82E1Y4RBemd8K9+8xeRd+VoPA0x+0Z/afPO7B Em6wmLHmxBoYEdG6HAuWvLnNresmCnk8YvKPsc3wElk2yQ==
TN9880IANNUHQ1U2L5V50ELO3F6SIGB5.com. 86400 IN NSEC3 1 1 0 - TN9909T8N02F0KG2NTTI6OKMHCFHSMVF NS DS RRSIG
TN9880IANNUHQ1U2L5V50ELO3F6SIGB5.com. 86400 IN RRSIG NSEC3 8 2 86400 20211003144128 20210926133128 39343 com. h/Ymto1R5ah1zrRcllKb8MOhYuVfBIOA6u5FftufDOOYfg6t4OaAi2Xm JJ3D5Spz5grkyw7Av2WzEJ1EfblPMMuFNDFQ3V9FRmeEOeQu6NFK8DDP L4RUQHfvSvCGClHBEdkCsaBZ7RnFgyO/I6X+bjXW8bJdUe+z8z0jfmgx JIG0Tifvvz5UM8Oun5c7HpX7KwDYOS8x/zmKQpRrT90grA==
ns1.asuscomm.com. 172800 IN A 52.250.42.40
ns2.asuscomm.com. 172800 IN A 52.250.42.40
;; Received 665 bytes from 2001:500:d937::30#53(l.gtld-servers.net) in 22 ms
myname.asuscomm.com. 120 IN A 5.65.219.124
asuscomm.com. 86400 IN NS ns1.asuscomm.com.
ns1.asuscomm.com. 604800 IN A 52.250.42.40
;; Received 87 bytes from 52.250.42.40#53(ns1.asuscomm.com) in 101 ms