Linux
CentOS 6.9，jwhois 輸出不完整
從某些日子開始，我注意到 CentOS 6.9 下帶有 .com 域的奇怪 whois 輸出：
whois google.com [Interrogando whois.verisign-grs.com] [whois.verisign-grs.com] Domain Name: GOOGLE.COM Registry Domain ID: 2138514_DOMAIN_COM-VRSN Registrar WHOIS Server: whois.markmonitor.com Registrar URL: http://www.markmonitor.com Updated Date: 2011-07-20T16:55:31Z Creation Date: 1997-09-15T04:00:00Z Registry Expiry Date: 2020-09-14T04:00:00Z Registrar: MarkMonitor Inc. Registrar IANA ID: 292 Registrar Abuse Contact Email: abusecomplaints@markmonitor.com Registrar Abuse Contact Phone: +1.2083895740 Domain Status: clientDeleteProhibited https://icann.org/epp#clientDeleteProhibited Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited Domain Status: clientUpdateProhibited https://icann.org/epp#clientUpdateProhibited Domain Status: serverDeleteProhibited https://icann.org/epp#serverDeleteProhibited Domain Status: serverTransferProhibited https://icann.org/epp#serverTransferProhibited Domain Status: serverUpdateProhibited https://icann.org/epp#serverUpdateProhibited Name Server: NS1.GOOGLE.COM Name Server: NS2.GOOGLE.COM Name Server: NS3.GOOGLE.COM Name Server: NS4.GOOGLE.COM DNSSEC: unsigned URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/ >>> Last update of whois database: 2017-07-31T15:24:36Z <<< For more information on Whois status codes, please visit https://icann.org/epp NOTICE: The expiration date displayed in this record is the date the registrar's sponsorship of the domain name registration in the registry is currently set to expire. This date does not necessarily reflect the expiration date of the domain name registrant's agreement with the sponsoring registrar. Users may consult the sponsoring registrar's Whois database to view the registrar's reported date of expiration for this registration. TERMS OF USE: You are not authorized to access or query our Whois database through the use of electronic processes that are high-volume and automated except as reasonably necessary to register domain names or modify existing registrations; the Data in VeriSign Global Registry Services' ("VeriSign") Whois database is provided by VeriSign for information purposes only, and to assist persons in obtaining information about or related to a domain name registration record. VeriSign does not guarantee its accuracy. By submitting a Whois query, you agree to abide by the following terms of use: You agree that you may use this Data only for lawful purposes and that under no circumstances will you use this Data to: (1) allow, enable, or otherwise support the transmission of mass unsolicited, commercial advertising or solicitations via e-mail, telephone, or facsimile; or (2) enable high volume, automated, electronic processes that apply to VeriSign (or its computer systems). The compilation, repackaging, dissemination or other use of this Data is expressly prohibited without the prior written consent of VeriSign. You agree not to use electronic processes that are automated and high-volume to access or query the Whois database except as reasonably necessary to register domain names or modify existing registrations. VeriSign reserves the right to restrict your access to the Whois database in its sole discretion to ensure operational stability. VeriSign may restrict or terminate your access to the Whois database for failure to abide by these terms of use. VeriSign reserves the right to modify these terms at any time. The Registry database contains ONLY .COM, .NET, .EDU domains and Registrars.在 CentOS 7 中，我可以看到經典的、完整的 whois 輸出：
whois google.com [Interrogando whois.verisign-grs.com] [Redirezione verso whois.markmonitor.com] [Interrogando whois.markmonitor.com] [whois.markmonitor.com] Domain Name: google.com Registry Domain ID: 2138514_DOMAIN_COM-VRSN Registrar WHOIS Server: whois.markmonitor.com Registrar URL: http://www.markmonitor.com Updated Date: 2015-06-12T10:38:52-0700 Creation Date: 1997-09-15T00:00:00-0700 Registrar Registration Expiration Date: 2020-09-13T21:00:00-0700 Registrar: MarkMonitor, Inc. Registrar IANA ID: 292 Registrar Abuse Contact Email: abusecomplaints@markmonitor.com Registrar Abuse Contact Phone: +1.2083895740 Domain Status: clientUpdateProhibited (https://www.icann.org/epp#clientUpdateProhibited) Domain Status: clientTransferProhibited (https://www.icann.org/epp#clientTransferProhibited) Domain Status: clientDeleteProhibited (https://www.icann.org/epp#clientDeleteProhibited) Domain Status: serverUpdateProhibited (https://www.icann.org/epp#serverUpdateProhibited) Domain Status: serverTransferProhibited (https://www.icann.org/epp#serverTransferProhibited) Domain Status: serverDeleteProhibited (https://www.icann.org/epp#serverDeleteProhibited) Registry Registrant ID: Registrant Name: Dns Admin Registrant Organization: Google Inc. Registrant Street: Please contact contact-admin@google.com, 1600 Amphitheatre Parkway Registrant City: Mountain View Registrant State/Province: CA Registrant Postal Code: 94043 Registrant Country: US Registrant Phone: +1.6502530000 Registrant Phone Ext: Registrant Fax: +1.6506188571 Registrant Fax Ext: Registrant Email: dns-admin@google.com Registry Admin ID: Admin Name: DNS Admin Admin Organization: Google Inc. Admin Street: 1600 Amphitheatre Parkway Admin City: Mountain View Admin State/Province: CA Admin Postal Code: 94043 Admin Country: US Admin Phone: +1.6506234000 Admin Phone Ext: Admin Fax: +1.6506188571 Admin Fax Ext: Admin Email: dns-admin@google.com Registry Tech ID: Tech Name: DNS Admin Tech Organization: Google Inc. Tech Street: 2400 E. Bayshore Pkwy Tech City: Mountain View Tech State/Province: CA Tech Postal Code: 94043 Tech Country: US Tech Phone: +1.6503300100 Tech Phone Ext: Tech Fax: +1.6506181499 Tech Fax Ext: Tech Email: dns-admin@google.com Name Server: ns1.google.com Name Server: ns4.google.com Name Server: ns2.google.com Name Server: ns3.google.com DNSSEC: unsigned URL of the ICANN WHOIS Data Problem Reporting System: http://wdprs.internic.net/ >>> Last update of WHOIS database: 2017-07-31T07:15:42-0700 <<< The Data in MarkMonitor.com's WHOIS database is provided by MarkMonitor.com for information purposes, and to assist persons in obtaining information about or related to a domain name registration record. MarkMonitor.com does not guarantee its accuracy. By submitting a WHOIS query, you agree that you will use this Data only for lawful purposes and that, under no circumstances will you use this Data to: (1) allow, enable, or otherwise support the transmission of mass unsolicited, commercial advertising or solicitations via e-mail (spam); or (2) enable high volume, automated, electronic processes that apply to MarkMonitor.com (or its systems). MarkMonitor.com reserves the right to modify these terms at any time. By submitting this query, you agree to abide by this policy. MarkMonitor is the Global Leader in Online Brand Protection. MarkMonitor Domain Management(TM) MarkMonitor Brand Protection(TM) MarkMonitor AntiPiracy(TM) MarkMonitor AntiFraud(TM) Professional and Managed Services Visit MarkMonitor at http://www.markmonitor.com Contact us at +1.8007459229 In Europe, at +44.02032062220 For more information on Whois status codes, please visit https://www.icann.org/resources/pages/epp-status-codes-2014-06-16-en --我注意到的第一件（也是唯一一件）有用的事情是，在 CentOS 6.9 上，whois 不會重定向到 whois.markmonitor.com：
[Interrogando whois.verisign-grs.com] [Redirezione verso whois.markmonitor.com] [Interrogando whois.markmonitor.com]有人知道嗎？這是上週第一次發生…
我認為您已經描述了問題及其答案：舊的 whois 客戶端不會自動重定向到註冊商 whois。比較兩個 whois 客戶端的版本。
事實是目前（它將在接下來的幾個月內發生變化），.COM/NET 域名仍然在“瘦”系統資料庫中處理。這意味著系統資料庫 (VeriSign) 輸出的 whois 僅包含基本資訊，例如沒有聯繫數據。但是，在此輸出中，您可以看到負責的註冊商及其自己的 whois，因此“智能”客戶端將檢測到這一點並重新向註冊商 whois 查詢以收集其他數據。
whois 協議設計不足，所有這些“重定向”的東西都沒有在任何地方指定。只是一些客戶變得更聰明，希望能夠處理所有“拆分”的 whois 案件。因此，一個客戶可能會正確地做到這一點，而另一個客戶則不會。但在所有情況下，您始終可以明確指定要查詢的 whois 伺服器，因此在沒有發生重定向的情況下，您可以自己重做對註冊商 whois 伺服器的查詢。或者只是升級您的客戶端。