前言

Linux下有whois命令可以帮助我们快速的查看IP/域名的whois信息,原先我一直以为这个命令是通过http接口来查询whois,然后注册商提供这个API接口…知道今天抓了一个包才发现一个完全不知道的协议—-“whois协议”

以下是我抓到的包(可以放大看下)

在"protocol"一栏清楚的写着"whois”,这瞬间就是知识盲区了;追踪TCP流的内容如下:

huai.pub
VACY
Admin Postal Code: REDACTED FOR PRIVACY
Admin Country: REDACTED FOR PRIVACY
Admin Phone: REDACTED FOR PRIVACY
Admin Phone Ext: REDACTED FOR PRIVACY
Admin Fax: REDACTED FOR PRIVACY
Admin Fax Ext: REDACTED FOR PRIVACY
Admin Email: Please query the RDDS service of the Registrar of Record identified in this output for information on how to contact the Registrant, Admin, or Tech contact of the queried domain name.
Registry Tech ID: REDACTED FOR PRIVACY
Tech Name: REDACTED FOR PRIVACY
Tech Organization: REDACTED FOR PRIVACY
Tech Street: REDACTED FOR PRIVACY
Tech City: REDACTED FOR PRIVACY
Tech State/Province: REDACTED FOR PRIVACY
Tech Postal Code: REDACTED FOR PRIVACY
Tech Country: REDACTED FOR PRIVACY
Tech Phone: REDACTED FOR PRIVACY
Tech Phone Ext: REDACTED FOR PRIVACY
Tech Fax: REDACTED FOR PRIVACY
Tech Fax Ext: REDACTED FOR PRIVACY
Tech Email: Please query the RDDS service of the Registrar of Record identified in this output for information on how to contact the Registrant, Admin, or Tech contact of the queried domain name.
Name Server: uma.ns.cloudflare.com
Name Server: darl.ns.cloudflare.com
DNSSEC: signedDelegation
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of WHOIS database: 2020-01-04T15:45:47Z <<<

For more information on Whois status codes, please visit https://icann.org/epp

Terms of Use: Donuts Inc. provides this Whois service for information purposes, and to assist persons in obtaining information about or related to a domain name registration record. Donuts does not guarantee its accuracy. Users accessing the Donuts Whois service agree to use the data only for lawful purposes, and under no circumstances may this data be used to: a) allow, enable, or otherwise support the transmission by e-mail, telephone, or facsimile of mass unsolicited, commercial advertising or solicitations to entities other than the registrar...s own existing customers and b) enable high volume, automated, electronic processes that send queries or data to the systems of Donuts or any ICANN-accredited registrar, except as reasonably necessary to register domain names or modify existing registrations. When using the Donuts Whois service, please consider the following: The Whois service is not a replacement for standard EPP commands to the SRS service. Whois is not considered authoritative for registered domain objects. The Whois service may be scheduled for downtime during production or OT&E maintenance periods. Queries to the Whois services are throttled. If too many queries are received from a single IP address within a specified time, the service will begin to reject further queries for a period of time to prevent disruption of Whois service access. Abuse of the Whois system through data mining is mitigated by detecting and limiting bulk query access from single sources. Where applicable, the presence of a [Non-Public Data] tag indicates that such data is not made publicly available due to applicable data privacy laws or requirements. Should you wish to contact the registrant, please refer to the Whois records available through the registrar URL listed above. Access to non-public data may be provided, upon request, where it can be reasonably confirmed that the requester holds a specific legitimate interest and a proper legal basis for accessing the withheld data. Access to this data can be requested by submitting a request via the form found at https://donuts.domains/about/policies/whois-layered-access/ Donuts Inc. reserves the right to modify these terms at any time. By submitting this query, you agree to abide by this policy.

正文

于是查找了一下相关资料,才知道这是一种运行在43端口上的协议…

当然在 /etc/services 也有收录

yumu@Deepin:~/Desktop$ cat /etc/services | grep "43"
whois		43/tcp		nicname

特点

TCP43端口就是他的特点, 一般都在whois.nic.[域名后缀]上运行,比如博主在用的.pub域名所使用的服务器就是whois.nic.pub.我们可以用telnet对其进行交互(框内是我输入的内容)

用途

用途也只有一个,那就是供用户查询,没有其他花里胡哨的作用,也没有华丽的界面功能.一视同仁,没有任何身份验证.

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