我已经为我的网站 winpack.cf 设置了一个绑定 DNS 服务器，但似乎出现了问题：mxtoolbox 显示“2 个名称服务器超时或非权威响应后查找失败”...
我有 Ubuntu 14.04，我的配置中最奇怪的是，我认为这可能是一个问题（虽然我认为不应该），那就是域名服务器和主网站的 IP 相同. （这意味着我已在相同电脑）
我已经配置了适当的胶水记录，我相信。
我在 BIND 上的区域配置文件是：
;
; BIND data file for winpack.cf
;
$TTL 604800
@ IN SOA winpack.cf. winpackjason.outlook.com. (
2015020201 ; Serial
7200 ; Refresh
7200 ; Retry
2419200 ; Expire
900 ) ; Negative Cache TTL
IN A 2.84.10.240
;
@ IN NS ns.winpack.cf.
ns IN A 2.84.10.240
@ IN A 2.84.10.240
@ IN MX 10 winpack.cf.
@ IN TXT "v=spf1 mx a -all"
www IN CNAME winpack.cf.
“dig +trace +additional winpack.cf”的输出：
; <<>> DiG 9.9.5-3ubuntu0.1-Ubuntu <<>> +trace +additional winpack.cf
;; global options: +cmd
. 507723 IN NS h.root-servers.net.
. 507723 IN NS j.root-servers.net.
. 507723 IN NS a.root-servers.net.
. 507723 IN NS d.root-servers.net.
. 507723 IN NS b.root-servers.net.
. 507723 IN NS i.root-servers.net.
. 507723 IN NS k.root-servers.net.
. 507723 IN NS m.root-servers.net.
. 507723 IN NS c.root-servers.net.
. 507723 IN NS e.root-servers.net.
. 507723 IN NS f.root-servers.net.
. 507723 IN NS g.root-servers.net.
. 507723 IN NS l.root-servers.net.
. 517962 IN RRSIG NS 8 0 518400 20150212170000 20150202160000 16665 . SXORQYP2YP2riKiIF0pe0pokD5MIv8cFrT2plo/SXnRFapBFq7nQmpaf 1wMOO984I/N2Y7eu2J+mix98u0wRhLOWCj2/5ST45426escF9TPdzgtx yooBoF7yerydPKV/ou/oNvJBegIpOiYFpNamHtOV3/96ChZXWjTWRz/X PJU=
a.root-servers.net. 587253 IN A 198.41.0.4
a.root-servers.net. 604362 IN AAAA 2001:503:ba3e::2:30
b.root-servers.net. 95501 IN A 192.228.79.201
b.root-servers.net. 555723 IN AAAA 2001:500:84::b
c.root-servers.net. 368668 IN A 192.33.4.12
c.root-servers.net. 604363 IN AAAA 2001:500:2::c
d.root-servers.net. 80383 IN A 199.7.91.13
d.root-servers.net. 604363 IN AAAA 2001:500:2d::d
e.root-servers.net. 80385 IN A 192.203.230.10
f.root-servers.net. 80387 IN A 192.5.5.241
f.root-servers.net. 604362 IN AAAA 2001:500:2f::f
g.root-servers.net. 80384 IN A 192.112.36.4
h.root-servers.net. 80389 IN A 128.63.2.53
h.root-servers.net. 604362 IN AAAA 2001:500:1::803f:235
i.root-servers.net. 135814 IN A 192.36.148.17
i.root-servers.net. 604362 IN AAAA 2001:7fe::53
j.root-servers.net. 76216 IN A 192.58.128.30
j.root-servers.net. 604363 IN AAAA 2001:503:c27::2:30
k.root-servers.net. 76216 IN A 193.0.14.129
k.root-servers.net. 604362 IN AAAA 2001:7fd::1
l.root-servers.net. 76216 IN A 199.7.83.42
l.root-servers.net. 604363 IN AAAA 2001:500:3::42
m.root-servers.net. 1655 IN A 202.12.27.33
m.root-servers.net. 70832 IN AAAA 2001:dc3::35
;; Received 913 bytes from 127.0.1.1#53(127.0.1.1) in 56 ms
cf. 172800 IN NS a.ns.cf.
cf. 172800 IN NS b.ns.cf.
cf. 172800 IN NS c.ns.cf.
cf. 172800 IN NS d.ns.cf.
cf. 86400 IN NSEC cg. NS RRSIG NSEC
cf. 86400 IN RRSIG NSEC 8 1 86400 20150212170000 20150202160000 16665 . u1+7qdhGOIXsZ/xweAE8o1y1/H0JHCeGj+U74Hxzmft8z7fSOmdB2YO8 czo2g4al/sjmit+ViNnChzZ8nDRXSuFfXfytINyO79WqDz7yb/Q77Fxr XLVXiWOhgI3bnb/zfXlosmKh1zPhKMFa496vGzbaqPuSwj5ML2zMIw93 mTE=
a.ns.cf. 172800 IN A 185.21.168.17
b.ns.cf. 172800 IN A 185.21.169.17
c.ns.cf. 172800 IN A 185.21.170.17
d.ns.cf. 172800 IN A 185.21.171.17
a.ns.cf. 172800 IN AAAA 2a04:1b00:4::1
b.ns.cf. 172800 IN AAAA 2a04:1b00:5::1
c.ns.cf. 172800 IN AAAA 2a04:1b00:6::1
d.ns.cf. 172800 IN AAAA 2a04:1b00:7::1
;; Received 465 bytes from 192.203.230.10#53(e.root-servers.net) in 62 ms
winpack.cf. 300 IN NS ns.winpack.cf.
winpack.cf. 300 IN NS ns2.winpack.cf.
ns.winpack.cf. 7200 IN A 2.84.10.240
ns2.winpack.cf. 7200 IN A 2.84.10.239
dig: couldn't get address for 'ns.winpack.cf': no more
（做不是考虑名称服务器 ns2：它是不是在职的）
答案1
2.84.10.240不响应 DNS 查询（错误的 IP、主机关闭或被防火墙阻止）
$ dig @2.84.10.240 www.winpack.cf
; <<>> DiG 9.8.3-P1 <<>> @2.84.10.240 www.winpack.cf
; (1 server found)
;; global options: +cmd
;; connection timed out; no servers could be reached
如果主机已启动且 IP 地址正确，请确保允许 udp 和 tcp 协议上的端口 53 上的传入流量