他的 dns 服务器出问题了吧,递归没 A 记录
出现结果是因为缓存,不是劫持...
; <<>> DiG 9.10.3-P2 <<>>
u.cmbchina.com +trace
;; global options: +cmd
. 518400 IN NS
I.ROOT-SERVERS.NET.
. 518400 IN NS
C.ROOT-SERVERS.NET.
. 518400 IN NS
G.ROOT-SERVERS.NET.
. 518400 IN NS
L.ROOT-SERVERS.NET.
. 518400 IN NS
E.ROOT-SERVERS.NET.
. 518400 IN NS
K.ROOT-SERVERS.NET.
. 518400 IN NS
J.ROOT-SERVERS.NET.
. 518400 IN NS
A.ROOT-SERVERS.NET.
. 518400 IN NS
D.ROOT-SERVERS.NET.
. 518400 IN NS
H.ROOT-SERVERS.NET.
. 518400 IN NS
F.ROOT-SERVERS.NET.
. 518400 IN NS
B.ROOT-SERVERS.NET.
. 518400 IN NS
M.ROOT-SERVERS.NET.
;; Received 797 bytes from 127.0.0.1#53(127.0.0.1) in 1 ms
com. 172800 IN NS
m.gtld-servers.net.
com. 172800 IN NS
g.gtld-servers.net.
com. 172800 IN NS
b.gtld-servers.net.
com. 172800 IN NS
c.gtld-servers.net.
com. 172800 IN NS
l.gtld-servers.net.
com. 172800 IN NS
i.gtld-servers.net.
com. 172800 IN NS
e.gtld-servers.net.
com. 172800 IN NS
f.gtld-servers.net.
com. 172800 IN NS
d.gtld-servers.net.
com. 172800 IN NS
h.gtld-servers.net.
com. 172800 IN NS
k.gtld-servers.net.
com. 172800 IN NS
a.gtld-servers.net.
com. 172800 IN NS
j.gtld-servers.net.
com. 86400 IN DS 30909 8 2 E2D3C916F6DEEAC73294E8268FB5885044A833FC5459588F4A9184CF C41A5766
com. 86400 IN RRSIG DS 8 1 86400 20151228170000 20151218160000 62530 . IBQFfme1vXEDCgVQkkzL/eal7yQMGEwYhodhANAJ8fg3ev/6rK0U2HDd cIhMENvlodCg/FTfPuxWK6BOU1WO/rVEGS055ZkQQKTUo3lbGxKZ5DPl HRlpXbeRWgYgJ6vP9HBgVDsBFsrqlGxOxkM59WztCnANeTjXzS27RIKU bvU=
;; Received 738 bytes from 202.12.27.33#53(
M.ROOT-SERVERS.NET) in 78 ms
cmbchina.com. 172800 IN NS
ns.cmbchina.com.
cmbchina.com. 172800 IN NS
ns2.cmbchina.com.
cmbchina.com. 172800 IN NS
ns7.cmbchina.com.
cmbchina.com. 172800 IN NS
ns8.cmbchina.com.
CK0POJMG874LJREF7EFN8430QVIT8BSM.com. 86400 IN NSEC3 1 1 0 - CK0Q1GIN43N1ARRC9OSM6QPQR81H5M9A NS SOA RRSIG DNSKEY NSEC3PARAM
CK0POJMG874LJREF7EFN8430QVIT8BSM.com. 86400 IN RRSIG NSEC3 8 2 86400 20151222055833 20151215044833 51797 com. R7ao3G+me+1VlAeovJSAmjFXUUs5ed5vHsAa/8IsRWB9OX1Tz2F0Pwqf AIJBjPSdR/nkGrKNSQIlFVz0FXcZp4ZGQwKWwnbze222k5gVP/RU+EMH fglKO52BwVAG2zuE/swPsCrLFS6ARVfKwUmfhFnbAu/ouN3U/Ps1N4Xr 9AI=
V7HCPM4SB9S3PBBJ3A9ATKQEQGRNNRNM.com. 86400 IN NSEC3 1 1 0 - V7HG2B7V5ASMRNK5CDBQC2BPS20EPQRQ NS DS RRSIG
V7HCPM4SB9S3PBBJ3A9ATKQEQGRNNRNM.com. 86400 IN RRSIG NSEC3 8 2 86400 20151225124603 20151218113603 51797 com. yHt46Zjt6og1jB4zAt9LQryN8h3vZSwolYzEcOPUD1tdZYKPo8DgFnzM Z5tCEt0Jh2mIdL6c+qhX3Uc3CH5OtXt9XXsV7+8DW6U8xbk119JdhA3a G1kmtNGRHYQ8YwjIy/uzQEVjNY7udI7beQ+NCXWcjiTqa1V5Gsh4rQEy mlo=
;; Received 663 bytes from 192.5.6.30#53(
a.gtld-servers.net) in 275 ms
cmbchina.com. 86400 IN SOA
ns.cmbchina.com.
hostmaster.ns.cmbchina.com. 2014074396 10800 3600 604800 86400
;; Received 93 bytes from 222.66.171.250#53(
ns7.cmbchina.com) in 51 ms