Dnsyo是一个命令行DNS检测工具，能够在多达1500个不同网络的开放DNS服务器上进行查询。在做了DNS变更的时候用来检查DNS生效或排查DNS设置的时候是非常有用的。
项目地址：https://github.com/samarudge/dnsyo
Dnsyo安装
Ubuntu, Debian or Linux Mint
$ sudo apt-get install python-pip $ sudo pip install dnsyo --upgrade
CentOS, Fedora or RHEL
$ sudo yum install python-pip $ sudo pip install dnsyo --upgrade
Dnsyo使用
Dnsyo语法
$ dnsyo --help usage: dnsyo [options] domain [type] Query lots of DNS servers and colate the results positional arguments: domain Domain to query type Record type (A, CNAME, MX, etc.) optional arguments: -h, --help show this help message and exit --resolverlist RESOLVERLIST Location of the yaml resolvers list to download (http/https) --resolverfile RESOLVERFILE Location of the local yaml resolvers file --verbose, -v Extended debug info --simple, -s Simple output mode (good for UNIX parsing) --extended, -x Extended output mode including server addresses --threads THREADS, -t THREADS Number of worker threads to use --servers SERVERS, -q SERVERS Maximum number of servers to query (or ALL) --country COUNTRY, -c COUNTRY Query servers by two letter country code --update Check the list for working servers --updateSummary UPDATESUMMARY Location for the summary status of the update --updateDestination UPDATEDESTINATION Destination resolver list for update
Dnsyo使用实例
用100个线程同时查询所有DNS服务器上的结果。
$ dnsyo -t 100 -q ALL hi-linux.com Status: Queried 1097 of 1097 servers, duration: 0:00:42.016678 - RESULTS I asked 1097 servers for A records related to hi-linux.com, 324 responded with records and 773 gave errors Here are the results; 22 servers responded with; 199.27.79.133 39 servers responded with; 103.245.222.133 24 servers responded with; 23.235.47.133 18 servers responded with; 23.235.40.133 69 servers responded with; 185.31.17.133 14 servers responded with; 23.235.46.133 14 servers responded with; 185.31.19.133 14 servers responded with; 199.27.76.133 39 servers responded with; 23.235.43.133 17 servers responded with; 23.235.44.133 26 servers responded with; 185.31.18.133 15 servers responded with; 23.91.98.188 11 servers responded with; 23.235.39.133 2 servers responded with; 141.211.28.87 And here are the errors; 42 servers responded with; No Nameservers 22 servers responded with; No Answer 709 servers responded with; Server Timeout
使用--simple选项采用简单的输出模式，对于UNIX脚本是非常有用的。
$ dnsyo --simple hi-linux.com INFO QUERIED 500 INFO SUCCESS 222 INFO ERROR 278 RESULT 10 23.91.98.188 RESULT 30 103.245.222.133 RESULT 16 199.27.79.133 RESULT 11 23.235.47.133 RESULT 11 23.235.40.133 RESULT 16 23.235.44.133 RESULT 18 185.31.19.133 RESULT 24 23.235.43.133 RESULT 53 185.31.17.133 RESULT 13 185.31.18.133 RESULT 8 199.27.76.133 RESULT 4 23.235.46.133 RESULT 7 23.235.39.133 RESULT 1 141.211.28.87 ERROR 17 No Answer ERROR 18 No Nameservers ERROR 243 Server Timeout
使用--extended选项查询结果更加详细，包含其查询的服务器的名称和地址。
$ dnsyo --extended hi-linux.com Status: Queried 500 of 500 servers, duration: 0:00:16.818680 - RESULTS I asked 500 servers for A records related to hi-linux.com, 221 responded with records and 279 gave errors Here are the results; The following servers - 69.16.169.11 (HIGHWINDS - Highwinds Network Group, Inc. - US) - 4.2.2.4 (LEVEL3 Level 3 Communications - US) - 148.233.151.8 (Uninet S.A. de C.V. - MX) - 216.52.97.33 (INTERNAP-2BLK - Internap Network Services Corporation - US) - 204.97.212.10 (AS1239 SprintLink Global Network - US) - 201.69.193.143 (TELEFNICA BRASIL S.A,BR - BR) - 69.16.170.11 (HIGHWINDS - Highwinds Network Group, Inc. - US) - 199.2.252.10 (AS1239 SprintLink Global Network - US) - 216.165.129.158 (TDS-AS - TDS TELECOM - US) - 216.170.153.146 (TDS-AS - TDS TELECOM - US) - 186.224.32.6 (Portal Medianeira Informtica Ltda,BR - BR) - 4.2.2.1 (LEVEL3 Level 3 Communications - US) - 64.136.52.73 (AS-NETZERO - Netzero,INC. - US) - 216.52.254.1 (INTERNAP-BLK - Internap Network Services Corporation - US) responded with; 23.235.47.133 The following servers - 103.238.195.226 (BEACHHEADGROUP-AS-AP Beachhead Group Pty. Ltd.,AU - AU) - 203.50.2.71 (ASN-TELSTRA Telstra Pty Ltd - AU) - 60.241.64.224 (TPG-INTERNET-AP TPG Telecom Limited,AU - AU) - 74.82.42.42 (HURRICANE - Hurricane Electric, Inc. - US) - 60.225.26.2 (ASN-TELSTRA Telstra Pty Ltd,AU - AU) - 120.151.240.35 (ASN-TELSTRA Telstra Pty Ltd,AU - AU) - 165.21.83.88 (ERX-SINGNET SingNet - SG) - 203.144.207.29 (TRUEINTERNET-AS-AP TRUE INTERNET Co.,Ltd. - TH) - 14.203.108.78 (TPG-INTERNET-AP TPG Telecom Limited,AU - AU) - 164.124.107.9 (BORANET-KR, LG DACOM Corporation - KR) - 203.219.45.219 (TPG-INTERNET-AP TPG Telecom Limited,AU - AU) - 202.248.37.74 (INFOWEB FUJITSU LIMITED - JP) - 222.151.241.10 (OCN NTT Communications Corporation - JP) - 219.250.36.130 (broadNnet-KR, SK Broadband Co Ltd - KR) - 156.154.70.22 (ULTRADNS - NeuStar, Inc. - US) - 164.124.101.2 (BORANET-KR, LG DACOM Corporation - KR) - 216.146.35.35 (DYNDNS - Dynamic Network Services, Inc. - US) - 203.112.2.5 (MIINET UCOM Corporation - JP) - 110.143.125.229 (ASN-TELSTRA Telstra Pty Ltd,AU - AU) - 61.208.115.242 (OCN NTT Communications Corporation - JP) - 198.153.194.40 (DYNDNS - Dynamic Network Services, Inc. - US) - 203.112.2.4 (MIINET UCOM Corporation - JP) - 74.82.46.6 (HURRICANE - Hurricane Electric, Inc. - US) - 211.75.111.220 (HINET Data Communication Business Group,TW - TW) - 202.248.20.133 (INFOWEB FUJITSU LIMITED - JP) responded with; 103.245.222.133
通过指定记录类型查询特定类型的DNS记录，如查询MX记录。
$ dnsyo google.com MX Status: Queried 500 of 500 servers, duration: 0:00:06.193986 - RESULTS I asked 500 servers for MX records related to google.com, 14 responded with records and 486 gave errors Here are the results; 14 servers responded with; 10 aspmx.l.google.com. 20 alt1.aspmx.l.google.com. 30 alt2.aspmx.l.google.com. 40 alt3.aspmx.l.google.com. 50 alt4.aspmx.l.google.com. And here are the errors; 473 servers responded with; No Answer 4 servers responded with; No Nameservers 9 servers responded with; Server Timeout