Windows ephemeral ports11/8/2023 ![]() netsh int ipv4 set dynamicport tcp start=10000 num=1000.The start port is number, and the total number of ports is range. This command sets the dynamic port range for TCP. You adjust this range by using the netsh command, as follows: netsh int set dynamic start= number num= range. Or, the port range that is used by the servers can be modified on each server. This range is in addition to well-known ports that are used by services and applications. ![]() In these situations, we recommend that you reconfigure the firewalls to allow traffic between servers in the dynamic port range of 49152 through 65535. Microsoft customers who deploy servers that are running Windows Server 2008 may have problems that affect RPC communication between servers if firewalls are used on the internal network. The port range is now truly a range that has a starting point and an ending point. The range is set separately for each transport (TCP or UDP). You can view the dynamic port range on a computer that is running Windows Vista or Windows Server 2008 by using the following netsh commands: This is a change from the configuration of earlier versions of Windows that used a default port range of 1025 through 5000. ![]() The new default start port is 49152, and the new default end port is 65535. To comply with Internet Assigned Numbers Authority (IANA) recommendations, Microsoft has increased the dynamic client port range for outgoing connections in Windows Vista and Windows Server 2008. For more information, go to the following Microsoft website: Support is ending for some versions of WindowsĪpplies to: Windows Server 2019, Windows Server 2016, Windows Server 2012 R2, Windows 10 - all editions Original KB number: 929851 Introduction To continue receiving security updates for Windows, make sure that you are running Windows Vista with Service Pack 2 (SP2). Support for Windows Vista without any service packs installed ended on April 13, 2010. ![]()
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