我使用 dig 来验证我的 DNS 服务器答案：
@dns1:/etc/bind$ dig a.com +dnssec +multi
这是我得到的，它不包含（已验证数据）ad标志并且不包含签名：
; <<>> DiG 9.10.3-P4-Ubuntu <<>> a.com +dnssec +multi
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 29781
;; flags: qr rd ra; QUERY: 1, ANSWER: 5, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags: do; udp: 512
;; QUESTION SECTION:
;b.com. IN A
;; ANSWER SECTION:
a.com. 300 IN A 104.17.193.53
a.com. 300 IN A 104.17.196.53
a.com. 300 IN A 104.17.195.53
a.com. 300 IN A 104.17.192.53
a.com. 300 IN A 104.17.194.53
;; Query time: 19 msec
;; SERVER: 127.0.1.1#53(127.0.1.1)
;; WHEN: Thu May 24 10:26:39 BST 2018
;; MSG SIZE rcvd: 118
我的区域签名文件是（匿名化服务器名称之后）：
; File written on Thu May 24 02:13:50 2018
; dnssec_signzone version 9.10.3-P4-Ubuntu
com. 604800 IN SOA dns1.com. admin.com. (
33 ; serial
604820 ; refresh (1 week 20 seconds)
86600 ; retry (1 day 3 minutes 20 seconds)
2419600 ; expire (4 weeks 6 minutes 40 seconds)
604600 ; minimum (6 days 23 hours 56 minutes 40 seconds)
)
604800 RRSIG SOA 7 1 604800 (
20180623001350 20180524001350 12410 com.
Qfd9i1AndX/dmyQuksOo2CRXH5RyM7i52c3P
oXdLpfxsVFq+YTY4Hmcl6XLfvo5ES0G4uIOp
HFFpPfuGrcRBQVXmb6ANelbQc0bwCZxqUPkN
HyXi/nvQUDY2Yelc++BeTRW+2MilagE21Qu0
sBpF8/04gnt48LHJ/VYg3a9D7kmZr0vmBwLp
4ZBHkAjkPmmPVzoEUMsmUGHF8b8lzJ+jWvmZ
NIWMLHvpRUEVXZVfX1OGLTexIWenD+qYO5Th
NR6tyMRa9RkfLU3l189RVFyJ+yZFgj7Nqb0l
fdXGArpShUFdRyavVPaKPQhCHDsH4SZcN/kg
u/WZxsKy82c1CR+etg== )
604800 NS dns1.com.
604800 RRSIG NS 7 1 604800 (
20180623001350 20180524001350 12410 com.
Qj1DMmEhfkU5KI9MVrIlgKmQ5DxTjGuRNJ8i
wmOkH0bkcNVbGPJRn8RDUFng1O3zlPr0F27t
CFfLhiZI8BQKKO8HKonybTcHSIoI+Ovlt0H8
NXp8w6HMWcMhDwMLUVTk2bcFP8uvB3v6QO4b
JfHk9j81nUrIrWw3yt+Rvgk2H6omiEAQ3brJ
Sb149CoK1bQNG1AnSOifoEBa39eqcpnIcZfo
wnzc6LMkr2VXQCVRAK6bhZEGneX8Dv+FzcZ0
d3Gk5xZktIoeQkjXqxSCYMDRP2po8Np8VsDT
21r28kv/iS2RKvcDOCqh8ymLe/OjbO8oyccg
e9cRd7KhlGEn7MXyRA== )
604800 DNSKEY 256 3 7 (
AwEAAfZWrsuiFoAAGcOTDWyVlDoZjQC8CZc6
vmPDWucThvahdE5wArPSXaDbGKi6GoKF8Ex+
XCrzTs2hYXDp4XQALY6nvdz0TT+styyPP7UX
Xr8w7eOeGGpE0FVbT7A37uc3LKlae+lfo7us
mYCkLXnUFcPCfayuvkddYWtycOPc35lK/O/g
LMCnMssQHhERv2MdXEO2HW1X92N/IJZIW4Pu
6tJQYR/fnnrT/CBUnHEVMzFRbWnaFyOxxAj2
xIWKAHTsRL6m94wauXRtErvTpYhQ9oWQ2NyN
wcpkm74xAyn/zHzxTCenm8bz8B5l8/J6Z8EG
IIsUtTuH5kaWM9E2tuvd4+E=
) ; ZSK; alg = NSEC3RSASHA1; key id = 12410
604800 DNSKEY 257 3 7 (
AwEAAbc92MYUBPIs1L6lNAbubqRmZCfgv1h7
bPgIBMer16iAGtuDD5iKc12Lx1pgn8D6taNF
vBRYeYS9sNp0wsF5098bkbTc3T9HzDZGLU1b
gbYHpP9D9X4eyeB9Oo9q00P3USiXaFTWxp7J
OEq5PRPSZksD75SZA/JcWl24s4mC1fFCZ0jJ
pRE7dPxphNa5XCSl9V487GsC2eh6f6AqEcmT
kek6A6c102TsXG1ynoTO3UMxAUFDH0JkspGV
Pp/aTPzWxxXH2yN0sM6rAsns3FwmkmneqZez
XLuj9a6ovHbtPNy5umlx6RiFXda4e3walj6N
raeohzFgoKqrDBdo6HD/gAkxFs/hxrKLH8kY
twUvFsCLSAel9dmQ3hOX0N5uiRdWQivKss0b
dZyOHxT6V1srvCiJNUfvW3Lf60zKaOnEilSd
ak1yHP2HyAXVWTUW98SEWjxgiftQxZjSgMly
drL1Q/ywwlYX5D090BsavOeEPtjdg0JIQV9Q
EOVSJQO/EZDRrL+3WWfiO1/VohHoA2Msr0cV
N7HPfd1cMhXTZuGEeIevT33un3v6Mg2fHGbE
lpux1/cXR2hNw8YOX0bOBi9pNUTqYe7pGW15
TWTzM5MwoHX/U7qQYGtptmF9zf3BxeuvoLZI
SM2WTTvJqcluZAW8pwVqsnYBcRYRUopjGIn0
cn+L
) ; KSK; alg = NSEC3RSASHA1; key id = 62649
604800 RRSIG DNSKEY 7 1 604800 (
20180623001350 20180524001350 12410 com.
MuNVIE6oWV03+dXnXu+VufPQqfIgQvNIBODh
29Z67vH10RZkgFaFF/ElJB6Ue1L6pGTOQr75
9ooiNBZbP2aYMIfh4PPylJ1RB1KZmNxY1id/
QUZzQc3s2mHbnCqfWCND5dI98KgDht1RDgwu
ohwX8idwS+ENFWWdvk9hKe8+mlZlw9G7bNi6
XxqBkVNZR9G3EIaFCHb3ZqD6dppBMOUfGAHw
mEXkaPh0cpVjlz4z4Qs1BId7+ZDBRyn0hJG0
F2tuvw5NYRvggiPDYOA4juwKq/jxogV2+dCX
8JpC2bBaJiN481+hY9Hypy2R30wIanVaaOnY
i5iVkkU1ZdfAqe4urg== )
604800 RRSIG DNSKEY 7 1 604800 (
20180623001350 20180524001350 62649 com.
HxKx8nsyZ/qtrAvhsFJ9r7EBBwhSCGh0FJfM
b7BqiqUcq164wnrDwFcRWWv84YMpndGVKKYy
+/P57a8tZIqnKQy4wsBA0DcHG2j49EGXuCOt
KABdUAop2t2qTToM4dWBxmnR7jOGUG9HPNd5
bkUvS6eg00vVPNJ+PEfQffgeUanmg+zQet9f
SNxK8Sd1IG/MVfKDecIvM947DHjlTQK2T5xS
qmqjC62WiaJzVUiy+eAlfOPaCfSdheV6XEB4
As6TLES8QwW09ShBrfnCTtPErRLupaVb9Gw4
J49S98srPqlh+RJi7h1DxgttcLkYwKlU3FI5
FqIXJqVFSlTdAVbHUubTiBJ/wLL1MtK37X+i
Be4pKYVpEaPA+SQWocgbpQP3TVuDK8fJNFNs
VrpUq48wOhWh2XfJ2BvOOzvUZ3rD2KXEGBbo
tHEdtOif1lwsCAeZuYv5HFdFewVYwmQb2NMw
McKpGfKfdOB4x1NTE+WT/BByYJmhffWyjxWJ
5fdTdCAwcos9G12qkfmb2xP5r0LO7ERU7s61
qr+AV5V2h9VcNkRQFE0oSVpMh1s1ZTgIdDjN
RGpsO5OAth3dYGsjmbZ3SewOzM+3+/Gj/ftX
Mqjxi7rOhlC17lF0xyLNpRAS4K7yDne+FOGe
geVZo8uIOu/2YJTRMWUFpH1B03VXM4jJ9us= )
0 NSEC3PARAM 1 0 10 1C5A91FD094B6845
0 RRSIG NSEC3PARAM 7 1 0 (
20180623001350 20180524001350 12410 com.
qXpHn0q2GG/BK71mMYqCELsoHiFT6Oel82Jv
L/8HNAeGJamSc3Z7eUl8nAReQwCVNwE2+prf
2sbw/ylWzWiAgHII2Q/gQWr6UKcQjkIICrhk
F8Cl/D8CPtsZJFLYlOGno42ILmOfQIZ/QmTs
gZdF2vbNe0V2Ab93pAgC1sP5jIPFcL1VlteP
25GBY+IVPO8b165lMb9XCMDqZvx8DMXqn+xa
a/ofumNTD2klD9zBEECVcktNs//vun11A6RR
Thi323I2hXXl5zUBGmdprsvq7w8cZbvRdzy/
u9do1mWm/MbyI+xvBspH6UV5G9ZwHRU1qVVb
RIL34fRTv8T6rj5xYQ== )
dns1.com. 604800 IN A 192.168.56.3
604800 RRSIG A 7 2 604800 (
20180623001350 20180524001350 12410 com.
aHB7ZCD8dDV4jMHJsUg23jjcm48tTnUvS8hy
UKy9fX6lZiqD4STEPubw3gUnTOKyr22HU3Xu
6bMOS9Wa919UUA5wogB24MvJSmyj9+myN+rq
GoBzyn/6BpdDQCOnvOVC52JzZh3k2bkT6fo/
RiWiEczQbNGvDKiQsls1XRBywu+n39S68crd
Ft9g2PCyHnbOpmnFPHhSGr/w0mC/ZxcejMqL
I8Melbp5dGpS62nobpBdIAyjAx1e7FT6AmFm
dOWtdSbaKViMG07IMfL8eepGbBAtfO0xgUt5
UTcdj2CVgLcQZ0jkIt6zCXXeNWkk8m2m2ILe
wYPPhwqjjYr/holMmg== )
a.com. 604800 IN A 192.168.56.7
604800 RRSIG A 7 2 604800 (
20180623001350 20180524001350 12410 com.
0V7mUWUOuru41Rkp+RFp6eV13AHOdPnEanrV
msFGNbtaR893A2Lawvi9RWjKKxc/nqxKRdML
G+lL4SZS8rpWTovu615jLXO6EPFGLRg0Bs1L
Pq2T98uMLedga0kQycXhjQ4L9OBt5PjUzy2g
by6i2kd7WESqaSuwqZrHPhB9UO8bxGCrNH9/
OBSOpBNziT/0B+hezyKWw8zJjQtqPFll/2Td
5bRL3/aZJhof16QwevSTPU1EWHYCG5/6NtXS
JtIjZi1Pc8XayfiVdA+ZvmaLNRT2NyOMMfaD
MN4LAAUZXrvkId9QDoZuxzCazKKfgOotPGYt
8CHozVym7UyOpzpHtQ== )
604800 TXT "some text"
604800 RRSIG TXT 7 2 604800 (
20180623001350 20180524001350 12410 com.
Uta2/oGszVJAhm/DlGd7vnD+irg/GzyXlKHp
hYOVF4+IrWVO988QRLnRIz4dwvaDqWZKuCWy
LT86GnDWG+wXIkbzLgXO6Mq3+Wlu8u2aiu67
evTwqmaOYc8fBGcchioeHH7cs+1kbJrdccnC
Pf2U4A9uI6AiPv9Wg60wg+pObuuIcfWYRYe8
PFLXLWeq+pT7k/ePFoMDGH9m0/UnnAlIsOpg
/LHsh7hfAYDpIJSFRG5lRdZmoI90eqjWgmT3
pncNI4lnZXm9dWJqteauCdiBK8cmoTeQXno4
bZlyXVBBDTkmGR4i4H86lGCxArMjFdloyqQ0
2cDCCV8xjhKvvEegLQ== )
b.com. 604800 IN A 192.168.56.8
604800 RRSIG A 7 2 604800 (
20180623001350 20180524001350 12410 com.
2ui9x3SjrrEvFkcPbfcfC/NQW0MQOv2jy/Bd
+0QBTL7uF7eNcDBQpY/FHKgL2YtAvPYIlkPk
PWFNjM8sTsJzOPofgT4D9SwUFWelUxTTasqm
6HLgv7HW0rRMMM/OG6XUQsaUSZxbcFW6TxKT
PyvjxjzHUv9HP22iswXQXGd5OGGh1o45HjUP
mUMkmpWCAaqg3o+VghZ9HJdwGlxl60LsXtZ9
Oc23OnM+7vFuCYeo3TscjXt38Dlj10Y5zwdJ
g+MOiGlg64NOsC+kHGTEVeVc5kEWzKRLfOLl
tBRoFHxjQH3RQGiRzEXH8dGhqY0ygAefOEtl
9AH0vm3Tqp6uaP2Omg== )
604800 TXT ""
604800 RRSIG TXT 7 2 604800 (
20180623001350 20180524001350 12410 com.
etX8lM00XXK9hUMM4FVsc51zuYOCz2+6qNLM
3LTl54DGObE2kOtNDPtVKSBd9oP2ppNK7MxT
f82wyS5l19B7CjGg6Z/ywcok8ztcCYcGVpeF
b8aqugazU4+82jC/x+XBv2f+vYwj44kWCQQ+
hXoCNssaW71Y4IFQSgiC3GI//v+kMAZZhHDO
Ur6MEboWRIpNghpQcMuxVP+9bRfj/gDaIahu
/y52AnW68P8+LaX8wEoWv6Eg0HK5k5Sp++LA
0L0WYF0HizAkhbJtitAYzyQpyeHsji1DpYve
KTHGCFLl6reM//wZZUvv8r1vpq3SsZMg/7Hp
nO5+XlWyAB77vYmimA== )
8NRLOA7UP8TGKLFJ7A6KPTIS503NJ4NB.com. 604600 IN NSEC3 1 1 10 1C5A91FD094B6845 (
QNU3FGJ5VOCSBIP3N93ITKLM4OP6GMCO
A TXT RRSIG )
604600 RRSIG NSEC3 7 2 604600 (
20180623001350 20180524001350 12410 com.
0qFfv4wr6WYSb4JlrtOlmPWykmCUKNdADlH8
Ok4eS2JXftWpweGKKUa5hHoVR/09ssEMiu4X
hIhTAKEDWHfdrvOMb1NPH6n+m/tVr/dh593T
IAO6VuhNKDo0XGdH5wEg+lEQPNkhjr+I7qjL
IeSjMN3LNy9D+ouZdW3NBbyBPVYqK86X2V71
5lpWAPqQUV/DUljCs567aoNd4zFzImPi2RcW
iZO+iQVwGIfyxMvzd+D3+VZrwpr6GNdUKUHn
Vn95mBAIMlDA/cx8pb+2+qMc9HbGgumlweZw
e5lAe44WfVzvAvtZaQWEfqJ0qOCGbRCyAn3m
0l1Jye4nouPQYm9q9A== )
QNU3FGJ5VOCSBIP3N93ITKLM4OP6GMCO.com. 604600 IN NSEC3 1 1 10 1C5A91FD094B6845 (
TVQJ9TFT4DPK7IGFE32TKLFG6EH2CUH5
A RRSIG )
604600 RRSIG NSEC3 7 2 604600 (
20180623001350 20180524001350 12410 com.
qZCi11tgJWJwjK2NI9KTVkcaJ0Eln0NVDsjM
SQzZwIUx4p1wBbDNbMfntzY3tbFV9g7y4d37
gN02o/4O0JKNDHh8qA03zMTGc4129sUBD3We
m2eA4X4FSSv1ChTP75C3kxA07a/7DvkG3i3m
TQ2pOJ6T0c/z1c8TAjuW/4DTz8ZKYKUlvMH6
BvlGIwXPjk0wwQE6l2naBQTJoyKkAfGc4yM0
hOjweOo5xrxdd7xmppSBaTpIVgzIzLBy/lAP
3PPVQ3vaUHH6boFzQtLP4/io/3FG3KCAAmN0
r9iZn9SWPProRlInMyvOp1xBdHDvrWsPsBTu
LyX+5GVBHvpijahmuA== )
TVQJ9TFT4DPK7IGFE32TKLFG6EH2CUH5.com. 604600 IN NSEC3 1 1 10 1C5A91FD094B6845 (
0J67JF0QNUUEKT5VF6FQPCRR9T8I8RT7
NS SOA RRSIG DNSKEY NSEC3PARAM )
604600 RRSIG NSEC3 7 2 604600 (
20180623001350 20180524001350 12410 com.
gud9iAHIRi4vR6eCgwOe6Xz0fR5F1qksJz6x
7Zu0jj6BCMmvC1rT2AiW2GNiCiD006f5kN6d
omVpac955Ze/KBoMHg6YiOJXVK9OTo86vBxd
a6QJKLngoI/hgrsoRen8V+jaA3QvBxNkWJAH
TJrcyKQj7QVXUcenz7U3HPWCifq5TTlC6+0B
Vw4oM0tE2Umt4qzkEObW4dPd5HY4/SGk2LYa
f8tu4ipUZu5IwG6r05vdnnpa5plc7JlRELD3
du+vDLphwDQ3/E/r1rJCcwJcxnNjol6Zx/ej
s0cpqtarusF0sMlCKzCy5vEzaj+YuipAx0sy
rnDMeQLku1nE9lNyIQ== )
0J67JF0QNUUEKT5VF6FQPCRR9T8I8RT7.com. 604600 IN NSEC3 1 1 10 1C5A91FD094B6845 (
8NRLOA7UP8TGKLFJ7A6KPTIS503NJ4NB
A TXT RRSIG )
604600 RRSIG NSEC3 7 2 604600 (
20180623001350 20180524001350 12410 com.
8ZowNBjQXgaAx89kjTmgCu/9lYLk14L+xTWr
LeqTR03x44M3yuU5sjy61YHr/fc51D57+Rob
WjWcf4fLg4PEXg3jdj4f155e7I0Fh4O2hdmS
wvD4TuKDtcxKX0lq6oSPi3VNXMzEijFI7jFD
yHHj+ATPDPMIaQAnVp40aYd1L+0SSPJyAm/u
eG8Y2WKdFPCZ30VBZ4M/nOKD0QtEckbLW8dm
RHSoRfc1V7KFTeIRcjh6YHPy6QkeJzVt8DaA
0JKi9AD+ZtVRUYwq2W8vWcuTn0QCxmM0W8Z+
OBW1ennfzNTP9J9SSnai8DNcO0uzI/0kV4a8
H18OCk+4wjlE8NPSCQ== )