When you try to connect from TCP ports greater than 5000 you receive the error ‘WSAENOBUFS (10055)’
If you try to set up TCP connections from ports that are greater than 5000, the local computer responds with the following WSAENOBUFS (10055) error message:
An operation on a socket could not be performed because the system lacked sufficient buffer space or because a queue was full.
Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
322756 How to back up and restore the registry in Windows
The default maximum number of ephemeral TCP ports is 5000 in the products that are included in the “Applies to” section. A new parameter has been added in these products. To increase the maximum number of ephemeral ports, follow these steps:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters
951746 MS08-037: Description of the security update for DNS in Windows Server 2008, in Windows Server 2003, and in Windows 2000 Server (DNS server-side): July 8, 2008
951748 MS08-037: Description of the security update for DNS in Windows Server 2003, in Windows XP, and in Windows 2000 Server (client side): July 8, 2008
953230 MS08-037: Vulnerabilities in DNS could allow spoofing
当您尝试从大于 5000 的 TCP 端口连接时收到错误 WSAENOBUFS (10055)
如果您尝试从大于 5000 的端口 TCP 连接设置,本地计算机响应以下 WSAENOBUFS (10055) 错误消息:
由于系统缓冲区空间不足,或者因为队列已满,不能执行套接字上的操作。
重要:此部分、 方法或任务包含一些介绍如何修改注册表的步骤。但是,如果不正确地修改了注册表,可能会出现严重的问题。因此,请确保仔细按照下列步骤操作。为增加保护,对其进行修改之前备份注册表。然后,您可以在出现问题时还原注册表。有关如何备份和还原注册表的详细信息,请单击下面的文章编号,以查看 Microsoft 知识库中相应的文章:
322756 在 Windows 中 如何备份和还原注册表
在包含在“适用范围”部分的产品中,临时TCP端口的默认最大数量为5000。在这些产品中添加了一个新的参数。要增加临时端口的最大数量,请按照以下步骤操作:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters
951746 MS08-037: Windows Server 2008 中,Windows Server 2003 和 Windows 2000 服务器 (DNS 服务器端) 中的 DNS 安全更新的说明: 2008 年 7 月 8 日
951748 MS08-037: Windows Server 2003 中,在 Windows XP 和 Windows 2000 服务器 (客户端) 中的 DNS 安全更新的说明: 2008 年 7 月 8 日
953230 MS08-037: 在 DNS 中的漏洞可能允许欺骗
TCPTimedWaitDelay
注册表参数确定多长时间关闭的端口将等待,直到关闭的端口可以重复使用,一般设置为30
。