DOCUMENT:Q170791 25-MAR-2002 [win95x] TITLE :Windows 95 TCP Clients Run Out of Ports PRODUCT :Microsoft Windows 95.x Retail Product PROD/VER::1,2,2.1 OPER/SYS: KEYWORDS:kbnetwork osr1 osr2 win95kbfixlist ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Windows 95 - Microsoft Windows 95 OEM Service Release, versions 1, 2, 2.1 ------------------------------------------------------------------------------- SYMPTOMS ======== When you are running programs in Windows 95 that use excessive numbers of TCP ports (more than 3976 simultaneously), Windows may run out of TCP ports before the TCP/IP protocol releases closed connections. CAUSE ===== The TCP/IP state dictates that when a connection is closed, the connection is not released until two maximum segment lives (MSLs) have passed. This state is defined as the TIME-WAIT state. One MSL is defined as 120 seconds, and it takes four minutes for a closed connection to be released in TCP/IP. RESOLUTION ========== STATUS ====== This problem no longer occurs in Windows 98. To resolve this problem, install the current version of Windows. For information about the current version of Windows, visit http://www.microsoft.com/windows. MORE INFORMATION ================ Additional query words: ====================================================================== Keywords : kbnetwork osr1 osr2 win95 kbfixlist Technology : kbWin95search kbOPKSearch kbZNotKeyword3 kbWin95OPKOSR2 kbWin95OPKOSR1 kbWin95OPKOSR210 Version : :1,2,2.1 ============================================================================= 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 2002.