DOCUMENT:Q255221 08-AUG-2001 [winnt] TITLE :Client Can't Connect to Secure Web Site Requiring Reverse Lookup PRODUCT :Microsoft Windows NT PROD/VER:winnt:4.0 OPER/SYS: KEYWORDS: ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Windows NT Server version 4.0 ------------------------------------------------------------------------------- SYMPTOMS ======== Network clients may be unable to connect to secure Web sites that verify that the client Internet Protocol (IP) address belongs to a domain name registered in North America. If you attempt to download 128-bit encryption, you may receive a message stating that your IP address cannot be resolved to a domain name registered in North America. Clients experience no other problems browsing the Internet. Your Domain Naming System (DNS) server has a reverse lookup zone that is correctly configured. CAUSE ===== This behavior can occur when your DNS server is not registered with Internic to provide reverse lookup resolution for the network address of a segment of your network. When the DNS server has not registered a segment's network address with Internic, reverse lookup will not succeed for clients that have an IP address belonging to that network segment; the IP address cannot be resolved to a domain name. RESOLUTION ========== To resolve this behavior, use reverse lookup resolution for the network segment by registering the network address of the segment with Internic on your DNS server. MORE INFORMATION ================ For information about how to contact Internic, click the appropriate article number below to view the article in the Microsoft Knowledge Base: Q65416 Hardware and Software Third-Party Vendor Contact List, A-K Q60781 Hardware and Software Third-Party Vendor Contact List, L-P Q60782 Hardware and Software Third-Party Vendor Contact List, Q-Z Additional query words: ====================================================================== Keywords : Technology : kbWinNTsearch kbWinNT400search kbWinNTSsearch kbWinNTS400search kbWinNTS400 Version : winnt:4.0 Issue type : kbprb ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 2001.