DOCUMENT:Q245071 10-AUG-2001 [winnt] TITLE :Cannot Use Telnet on UNIX Workstation Through Proxy Server 2.0. PRODUCT :Microsoft Windows NT PROD/VER:winnt:2.0,4.0 OPER/SYS: KEYWORDS: ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Windows NT Server version 4.0 - Microsoft Proxy Server version 2.0 ------------------------------------------------------------------------------- SYMPTOMS ======== You may not be able to use a telnet client program on a UNIX workstation to connect to another computer through a machine that is running Microsoft Windows NT Server 4.0 and Microsoft Proxy Server 2.0. CAUSE ===== This behavior can occur if the telnet client program on the UNIX workstation is not fully compatible with Socks version 4.3a. RESOLUTION ========== To resolve this issue, use a telnet client program that is fully compatible with Socks version 4.3a on the UNIX workstation. MORE INFORMATION ================ Socks is a cross-platform mechanism that establishes secure communications between client and server computers. The Socks Proxy Service supports Socks version 4.3a and allows network users transparent access to the Internet by means of a Proxy Server. The Socks Proxy Service extends the redirection provided by the WinSock Proxy service to non-Windows platforms. It uses Transmission Control Protocol/Internet Protocol (TCP/IP) and can be used for TELNET, File Transfer Protocol (FTP), Gopher, and Hypertext Transfer Protocol (HTTP). The Socks Proxy Service does not support applications that rely on the User Datagram Protocol (UDP). The third-party products discussed in this article are manufactured by vendors independent of Microsoft; we make no warranty, implied or otherwise, regarding these products' performance or reliability. Additional query words: nt 4.0 fail proxy telnet ====================================================================== Keywords : Technology : kbWinNTsearch kbWinNT400search kbWinNTSsearch kbWinNTS400search kbWinNTS400 kbAudDeveloper kbProxyServSearch kbProxyServ200 Version : winnt:2.0,4.0 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.