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edns参数只支持全局配置，不支持单独配置 #262

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giveup opened this issue Mar 28, 2024 · 10 comments
Open

edns参数只支持全局配置，不支持单独配置 #262

giveup opened this issue Mar 28, 2024 · 10 comments

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@giveup
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giveup commented Mar 28, 2024 •
edited

经过验证。对于edns-client-subnet参数只支持全局配置，无法在某个上游服务器单独配置。

对于下面这种配置，edns参数不生效

server-https https://223.5.5.5/dns-query  -no-check-certificate -http-host dns.alidns.com -group domestic -subnet 113.65.29.0/24
server-https https://223.6.6.6/dns-query  -no-check-certificate -http-host dns.alidns.com -group domestic -subnet 113.65.29.0/24
server-https https://223.5.5.5/dns-query  -no-check-certificate -http-host dns.alidns.com -group oversea -subnet 103.225.87.0/24
server-https https://223.6.6.6/dns-query  -no-check-certificate -http-host dns.alidns.com -group oversea -subnet 103.225.87.0/24

但是启动的时候，也没报错

root@AX6S:/etc/smartdns# ./smartdns-rs run -c ./smartdns-rs.conf 
2024-03-28 08:03:18.937:INFO: Smart-DNS 🐋 0.7.2 starting
2024-03-28 08:03:18.937:INFO: loading configuration from: "./smartdns-rs.conf"
2024-03-28 08:03:18.938:WARN:smartdns::config::parser::nameserver:131: unknown server options: http-host, Some("dns.alidns.com")
2024-03-28 08:03:18.939:WARN:smartdns::config::parser::nameserver:131: unknown server options: http-host, Some("dns.alidns.com")
2024-03-28 08:03:18.939:WARN:smartdns::config::parser::nameserver:131: unknown server options: http-host, Some("dns.alidns.com")
2024-03-28 08:03:18.939:WARN:smartdns::config::parser::nameserver:131: unknown server options: http-host, Some("dns.alidns.com")
2024-03-28 08:03:18.943:INFO: whoami 👉 smartdns-rs
2024-03-28 08:03:18.943:INFO: upstream server: https://223.5.5.5/dns-query?ssl_verify=false [Group: ["domestic"]] 
2024-03-28 08:03:18.943:INFO: upstream server: https://223.6.6.6/dns-query?ssl_verify=false [Group: ["domestic"]] 
2024-03-28 08:03:18.943:INFO: upstream server: https://223.5.5.5/dns-query?ssl_verify=false [Group: ["oversea"]] 
2024-03-28 08:03:18.943:INFO: upstream server: https://223.6.6.6/dns-query?ssl_verify=false [Group: ["oversea"]] 
2024-03-28 08:03:18.944:INFO: upstream server: https://223.5.5.5/dns-query?ssl_verify=false [Group: default]
2024-03-28 08:03:18.944:INFO: upstream server: https://223.6.6.6/dns-query?ssl_verify=false [Group: default]
2024-03-28 08:03:18.944:INFO: upstream server: https://223.5.5.5/dns-query?ssl_verify=false [Group: default]
2024-03-28 08:03:18.944:INFO: upstream server: https://223.6.6.6/dns-query?ssl_verify=false [Group: default]
2024-03-28 08:03:18.959:INFO: bootstrap-dns https://223.5.5.5/dns-query?ssl_verify=false
2024-03-28 08:03:18.960:INFO: bootstrap-dns https://223.6.6.6/dns-query?ssl_verify=false
2024-03-28 08:03:18.960:INFO: bootstrap-dns https://223.5.5.5/dns-query?ssl_verify=false
2024-03-28 08:03:18.960:INFO: bootstrap-dns https://223.6.6.6/dns-query?ssl_verify=false
2024-03-28 08:03:18.961:INFO: listening for UDP on 192.168.31.1:1053@br-lan
2024-03-28 08:03:18.961:INFO: listening for UDP on 127.0.0.1:1053@lo
2024-03-28 08:03:18.961:INFO: listening for UDP on 192.168.31.1:1054@br-lan
2024-03-28 08:03:18.961:INFO: listening for UDP on 127.0.0.1:1054@lo

查看代码发现有相关的单元测试
https://github.com/mokeyish/smartdns-rs/blob/main/src/dns_conf.rs#L1015
@giveup
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giveup commented Mar 28, 2024

#231 这个应该是一样的问题

@mokeyish
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好，我周末看一下

@mokeyish
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image

增加了日志打印，测试是配置进去的。

@giveup
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giveup commented Mar 31, 2024

似乎没有什么变化@mokeyish

2024-03-31 04:47:31.51:DEBUG:smartdns::server::udp:43: received udp request from: 127.0.0.1:42027
2024-03-31 04:47:31.52:DEBUG:smartdns::app:370: request:43609 src:UDP://127.0.0.1#42027 type:QUERY dnssec:false QUERY:www.bing.com.:A:IN qflags:RD,AD
2024-03-31 04:47:31.52:DEBUG:smartdns::dns_client:248: initialize name server [Group: domestic]
2024-03-31 04:47:31.53:DEBUG:smartdns::dns_mw_ns:84: query name: www.bing.com. type: A via [Group: domestic]
2024-03-31 04:47:37.885:DEBUG:smartdns::server::udp:43: received udp request from: 127.0.0.1:58684
2024-03-31 04:47:37.885:DEBUG:smartdns::app:370: request:9833 src:UDP://127.0.0.1#58684 type:QUERY dnssec:false QUERY:www.bing.com.:A:IN qflags:RD,AD
2024-03-31 04:47:37.885:DEBUG:smartdns::dns_client:248: initialize name server [Group: oversea]
2024-03-31 04:47:37.886:DEBUG:smartdns::dns_mw_ns:84: query name: www.bing.com. type: A via [Group: oversea]

root@AX6S:~# dig @127.0.0.1 -p 1053 www.bing.com

; <<>> DiG 9.18.24 <<>> @127.0.0.1 -p 1053 www.bing.com
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 43609
;; flags: qr rd ra; QUERY: 1, ANSWER: 5, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;www.bing.com.			IN	A

;; ANSWER SECTION:
www.bing.com.		600	IN	CNAME	www-www.bing.com.trafficmanager.net.
www-www.bing.com.trafficmanager.net. 600 IN CNAME cn-bing-com.cn.a-0001.a-msedge.net.
cn-bing-com.cn.a-0001.a-msedge.net. 600	IN CNAME china.bing123.com.
china.bing123.com.	600	IN	A	202.89.233.100
china.bing123.com.	600	IN	A	202.89.233.101

;; Query time: 80 msec
;; SERVER: 127.0.0.1#1053(127.0.0.1) (UDP)
;; WHEN: Sun Mar 31 12:47:31 HKT 2024
;; MSG SIZE  rcvd: 184

root@AX6S:~# dig @127.0.0.1 -p 1054 www.bing.com

; <<>> DiG 9.18.24 <<>> @127.0.0.1 -p 1054 www.bing.com
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 9833
;; flags: qr rd ra; QUERY: 1, ANSWER: 5, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;www.bing.com.			IN	A

;; ANSWER SECTION:
www.bing.com.		600	IN	CNAME	www-www.bing.com.trafficmanager.net.
www-www.bing.com.trafficmanager.net. 600 IN CNAME cn-bing-com.cn.a-0001.a-msedge.net.
cn-bing-com.cn.a-0001.a-msedge.net. 600	IN CNAME china.bing123.com.
china.bing123.com.	600	IN	A	202.89.233.100
china.bing123.com.	600	IN	A	202.89.233.101

;; Query time: 10 msec
;; SERVER: 127.0.0.1#1054(127.0.0.1) (UDP)
;; WHEN: Sun Mar 31 12:47:37 HKT 2024
;; MSG SIZE  rcvd: 184

这是开启全局edns的日志

2024-03-31 04:55:31.804:DEBUG:smartdns::server::udp:43: received udp request from: 127.0.0.1:59800
2024-03-31 04:55:31.804:DEBUG:smartdns::app:370: request:6887 src:UDP://127.0.0.1#59800 type:QUERY dnssec:false QUERY:www.bing.com.:A:IN qflags:RD,AD
2024-03-31 04:55:31.805:DEBUG:smartdns::dns_client:248: initialize name server [Group: domestic]
2024-03-31 04:55:31.805:DEBUG:smartdns::dns_mw_ns:84: query name: www.bing.com. type: A via [Group: domestic]
2024-03-31 04:55:36.349:DEBUG:smartdns::server::udp:43: received udp request from: 127.0.0.1:55994
2024-03-31 04:55:36.350:DEBUG:smartdns::app:370: request:41103 src:UDP://127.0.0.1#55994 type:QUERY dnssec:false QUERY:www.bing.com.:A:IN qflags:RD,AD
2024-03-31 04:55:36.350:DEBUG:smartdns::dns_client:248: initialize name server [Group: oversea]
2024-03-31 04:55:36.350:DEBUG:smartdns::dns_mw_ns:84: query name: www.bing.com. type: A via [Group: oversea]

root@AX6S:~# dig @127.0.0.1 -p 1053 www.bing.com

; <<>> DiG 9.18.24 <<>> @127.0.0.1 -p 1053 www.bing.com
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 6887
;; flags: qr rd ra; QUERY: 1, ANSWER: 12, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;www.bing.com.			IN	A

;; ANSWER SECTION:
www.bing.com.		600	IN	CNAME	www-www.bing.com.trafficmanager.net.
www-www.bing.com.trafficmanager.net. 600 IN CNAME www.bing.com.edgekey.net.
www.bing.com.edgekey.net. 600	IN	CNAME	e86303.dscx.akamaiedge.net.
e86303.dscx.akamaiedge.net. 600	IN	A	23.212.250.69
e86303.dscx.akamaiedge.net. 600	IN	A	23.212.250.81
e86303.dscx.akamaiedge.net. 600	IN	A	23.212.250.72
e86303.dscx.akamaiedge.net. 600	IN	A	23.212.250.78
e86303.dscx.akamaiedge.net. 600	IN	A	23.212.250.91
e86303.dscx.akamaiedge.net. 600	IN	A	23.212.250.70
e86303.dscx.akamaiedge.net. 600	IN	A	23.212.250.82
e86303.dscx.akamaiedge.net. 600	IN	A	23.212.250.71
e86303.dscx.akamaiedge.net. 600	IN	A	23.212.250.87

;; Query time: 80 msec
;; SERVER: 127.0.0.1#1053(127.0.0.1) (UDP)
;; WHEN: Sun Mar 31 12:55:31 HKT 2024
;; MSG SIZE  rcvd: 295

root@AX6S:~# dig @127.0.0.1 -p 1054 www.bing.com

; <<>> DiG 9.18.24 <<>> @127.0.0.1 -p 1054 www.bing.com
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 41103
;; flags: qr rd ra; QUERY: 1, ANSWER: 12, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;www.bing.com.			IN	A

;; ANSWER SECTION:
www.bing.com.		600	IN	CNAME	www-www.bing.com.trafficmanager.net.
www-www.bing.com.trafficmanager.net. 600 IN CNAME www.bing.com.edgekey.net.
www.bing.com.edgekey.net. 600	IN	CNAME	e86303.dscx.akamaiedge.net.
e86303.dscx.akamaiedge.net. 600	IN	A	23.212.250.83
e86303.dscx.akamaiedge.net. 600	IN	A	23.212.250.90
e86303.dscx.akamaiedge.net. 600	IN	A	23.212.250.87
e86303.dscx.akamaiedge.net. 600	IN	A	23.212.250.81
e86303.dscx.akamaiedge.net. 600	IN	A	23.212.250.68
e86303.dscx.akamaiedge.net. 600	IN	A	23.212.250.69
e86303.dscx.akamaiedge.net. 600	IN	A	23.212.250.70
e86303.dscx.akamaiedge.net. 600	IN	A	23.212.250.80
e86303.dscx.akamaiedge.net. 600	IN	A	23.212.250.91

;; Query time: 10 msec
;; SERVER: 127.0.0.1#1054(127.0.0.1) (UDP)
;; WHEN: Sun Mar 31 12:55:36 HKT 2024
;; MSG SIZE  rcvd: 295

root@AX6S:~#

并且还有个bug，如果同时开启全局edns和上游服务器edns-subnet，那么全局的edns会失效，并且上游服务器自己的ends-subnet也会失效，等于没有配置任何edns，单独开启全局edns关闭上游edns-subnet则正常工作。单独配置上游edns-subnet不生效。
版本是交叉编译的的arm64版本（aarch64-unknown-linux-musl）

@mokeyish
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mokeyish commented Apr 2, 2024

这不可能吧，代码里是优先上游服务器的没有才使用全局的，明明白白的写在这，不会反过来。

https://github.com/mokeyish/smartdns-rs/blob/main/src/dns_client.rs#L608-L610

你可以把我截图那代码改动，改上去编译看看。

你可以 dig 命令测试的。

@giveup
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giveup commented Apr 2, 2024

图片的改动我手动修改了，但是测试下了，似乎没有变化
首先是结果

root@AX6S:~# dig @127.0.0.1 -p 1054 www.bing.com

; <<>> DiG 9.18.24 <<>> @127.0.0.1 -p 1054 www.bing.com
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 21114
;; flags: qr rd ra; QUERY: 1, ANSWER: 5, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;www.bing.com.			IN	A

;; ANSWER SECTION:
www.bing.com.		600	IN	CNAME	www-www.bing.com.trafficmanager.net.
www-www.bing.com.trafficmanager.net. 600 IN CNAME cn-bing-com.cn.a-0001.a-msedge.net.
cn-bing-com.cn.a-0001.a-msedge.net. 600	IN CNAME china.bing123.com.
china.bing123.com.	600	IN	A	202.89.233.100
china.bing123.com.	600	IN	A	202.89.233.101

;; Query time: 79 msec
;; SERVER: 127.0.0.1#1054(127.0.0.1) (UDP)
;; WHEN: Tue Apr 02 15:22:35 HKT 2024
;; MSG SIZE  rcvd: 184

返回的是国内CDN的IP，说明并没有遵循edns设置。
接下来是日志打印，请求的确被发送到设置了国外IP的dns组，日志显示的subnet IP和配置文件一致

2024-04-02 07:22:35.139:DEBUG:smartdns::server::udp:43: received udp request from: 127.0.0.1:46103
2024-04-02 07:22:35.140:DEBUG:smartdns::app:370: request:21114 src:UDP://127.0.0.1#46103 type:QUERY dnssec:false QUERY:www.bing.com.:A:IN qflags:RD,AD
2024-04-02 07:22:35.140:DEBUG:smartdns::dns_client:245: initialize name server [Group: oversea]
2024-04-02 07:22:35.141:DEBUG:smartdns::dns_client:587: DnsUrl { proto: Https, host: Ipv4(223.6.6.6), port: None, path: Some("/dns-query"), ip: None, params: {"ssl_verify": "false"}, fragment: None } client_subnet =>Some(ClientSubnet { address: 103.225.87.0, source_prefix: 24, scope_prefix: 0 })
2024-04-02 07:22:35.141:DEBUG:smartdns::dns_client:587: DnsUrl { proto: Https, host: Ipv4(223.5.5.5), port: None, path: Some("/dns-query"), ip: None, params: {"ssl_verify": "false"}, fragment: None } client_subnet =>Some(ClientSubnet { address: 103.225.87.0, source_prefix: 24, scope_prefix: 0 })
2024-04-02 07:22:35.141:DEBUG:smartdns::dns_mw_ns:84: query name: www.bing.com. type: A via [Group: oversea]

部分配置文件

bind :1054@br-lan  -no-speed-check -no-dualstack-selection -force-aaaa-soa -group oversea
bind :1054@lo  -no-speed-check -no-dualstack-selection -force-aaaa-soa -group oversea
server-https https://223.5.5.5/dns-query  -no-check-certificate -http-host dns.alidns.com -group oversea -subnet 103.225.87.0/24
server-https https://223.6.6.6/dns-query  -no-check-certificate -http-host dns.alidns.com -group oversea -subnet 103.225.87.0/24

接下来是全局edns设置的测试情况
请求日志打印

2024-04-02 07:33:23.489:DEBUG:smartdns::server::udp:43: received udp request from: 127.0.0.1:57729
2024-04-02 07:33:23.490:DEBUG:smartdns::app:370: request:48765 src:UDP://127.0.0.1#57729 type:QUERY dnssec:false QUERY:www.bing.com.:A:IN qflags:RD,AD
2024-04-02 07:33:23.490:DEBUG:smartdns::dns_client:245: initialize name server [Group: oversea]
2024-04-02 07:33:23.490:DEBUG:smartdns::dns_client:587: DnsUrl { proto: Https, host: Ipv4(223.5.5.5), port: None, path: Some("/dns-query"), ip: None, params: {"ssl_verify": "false"}, fragment: None } client_subnet =>Some(ClientSubnet { address: 103.225.87.0, source_prefix: 24, scope_prefix: 0 })
2024-04-02 07:33:23.491:DEBUG:smartdns::dns_client:587: DnsUrl { proto: Https, host: Ipv4(223.6.6.6), port: None, path: Some("/dns-query"), ip: None, params: {"ssl_verify": "false"}, fragment: None } client_subnet =>Some(ClientSubnet { address: 103.225.87.0, source_prefix: 24, scope_prefix: 0 })
2024-04-02 07:33:23.491:DEBUG:smartdns::dns_mw_ns:84: query name: www.bing.com. type: A via [Group: oversea]

配置文件，必须把所有上游dns的单独的subnet参数去掉

bind :1053@br-lan -group domestic
bind :1053@lo -group domestic
bind :1054@br-lan  -no-speed-check -no-dualstack-selection -force-aaaa-soa -group oversea
bind :1054@lo  -no-speed-check -no-dualstack-selection -force-aaaa-soa -group oversea
edns-client-subnet 103.225.87.0/24
server-https https://223.5.5.5/dns-query  -no-check-certificate -http-host dns.alidns.com -group domestic
server-https https://223.6.6.6/dns-query  -no-check-certificate -http-host dns.alidns.com -group domestic
server-https https://223.5.5.5/dns-query  -no-check-certificate -http-host dns.alidns.com -group oversea
server-https https://223.6.6.6/dns-query  -no-check-certificate -http-host dns.alidns.com -group oversea

返回结果，符合预期，返回的IP为海外

root@AX6S:~# dig @127.0.0.1 -p 1054 www.bing.com

; <<>> DiG 9.18.24 <<>> @127.0.0.1 -p 1054 www.bing.com
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 48765
;; flags: qr rd ra; QUERY: 1, ANSWER: 5, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;www.bing.com.			IN	A

;; ANSWER SECTION:
www.bing.com.		600	IN	CNAME	www-www.bing.com.trafficmanager.net.
www-www.bing.com.trafficmanager.net. 600 IN CNAME www-bing-com.dual-a-0001.a-msedge.net.
www-bing-com.dual-a-0001.a-msedge.net. 600 IN CNAME dual-a-0001.a-msedge.net.
dual-a-0001.a-msedge.net. 600	IN	A	204.79.197.200
dual-a-0001.a-msedge.net. 600	IN	A	13.107.21.200

;; Query time: 69 msec
;; SERVER: 127.0.0.1#1054(127.0.0.1) (UDP)
;; WHEN: Tue Apr 02 15:33:23 HKT 2024
;; MSG SIZE  rcvd: 173

从新增的打印日志来看，请求时用的subnet IP确实是参数配置的，但是返回结果却不符合预期。
请问我这边还需要做什么来验证？

@mokeyish
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mokeyish commented Apr 2, 2024

你用这个 https://clouddocs.f5.com/training/community/dns/html/class4/module1/lab3.html

直接用dig 查询，带上client subnet 选项，比较是否与smartdns的一致。

更进一步，可以用 wireshark 抓包看看，是否带上了client subnet 但是这样，上游就必须用 udp 明文协议了。

@giveup
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giveup commented Apr 2, 2024

我测试的时候用的就是dig

root@AX6S:~# dig -v
DiG 9.18.24

测试流程，smartdns-rs监听1053/1054，分别对应国内海外域名
使用dig工具模拟dns查询请求
抓包可能不好操作，因为这些测试用例都是在路由器里面跑的。

@mokeyish
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mokeyish commented Apr 2, 2024

image

让你用这个测试对比

@giveup
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giveup commented Apr 2, 2024

image

让你用这个测试对比

没理解这个意思，在dig请求上带上subnet，不符合实际场景，实际场景是路由器内进程发送udp请求给smartdns，然后返回结果，这些进程发送请求时也不会带上subnet的。

root@AX6S:~# dig @127.0.0.1 -p 1054  www.bing.com +subnet=9.9.9.0/24

; <<>> DiG 9.18.24 <<>> @127.0.0.1 -p 1054 www.bing.com +subnet=9.9.9.0/24
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1381
;; flags: qr rd ra; QUERY: 1, ANSWER: 5, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;www.bing.com.			IN	A

;; ANSWER SECTION:
www.bing.com.		600	IN	CNAME	www-www.bing.com.trafficmanager.net.
www-www.bing.com.trafficmanager.net. 600 IN CNAME cn-bing-com.cn.a-0001.a-msedge.net.
cn-bing-com.cn.a-0001.a-msedge.net. 600	IN CNAME china.bing123.com.
china.bing123.com.	600	IN	A	202.89.233.100
china.bing123.com.	600	IN	A	202.89.233.101

;; Query time: 69 msec
;; SERVER: 127.0.0.1#1054(127.0.0.1) (UDP)
;; WHEN: Tue Apr 02 20:01:04 HKT 2024
;; MSG SIZE  rcvd: 184

如果是正常发给阿里dns返回的结果则符合预期

root@AX6S:~# dig @223.5.5.5  www.bing.com +subnet=9.9.9.0/24

; <<>> DiG 9.18.24 <<>> @223.5.5.5 www.bing.com +subnet=9.9.9.0/24
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 64087
;; flags: qr rd ra; QUERY: 1, ANSWER: 5, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
; CLIENT-SUBNET: 9.9.9.0/24/24
;; QUESTION SECTION:
;www.bing.com.			IN	A

;; ANSWER SECTION:
www.bing.com.		1	IN	CNAME	www-www.bing.com.trafficmanager.net.
www-www.bing.com.trafficmanager.net. 1 IN CNAME	cn-bing-com.cn.a-0001.a-msedge.net.
cn-bing-com.cn.a-0001.a-msedge.net. 1 IN CNAME	a-0001.a-msedge.net.
a-0001.a-msedge.net.	1	IN	A	13.107.21.200
a-0001.a-msedge.net.	1	IN	A	204.79.197.200

;; Query time: 9 msec
;; SERVER: 223.5.5.5#53(223.5.5.5) (UDP)
;; WHEN: Tue Apr 02 20:01:37 HKT 2024
;; MSG SIZE  rcvd: 192

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