Windows Server 2012 R2: Ephemeral ports (a.k.a. Dynamic ports) hotfixes

Applies to:

Windows Server 2012 R2

Ephemeral port also known as (a.k.a.) Dynamic ports related hotfixes for “Windows Server 2012 R2”:

Install 3149157 Reliability and scalability improvements in TCP/IP for Windows 8.1 and Windows Server 2012 R2

https://support.microsoft.com/?id=3149157

tcpip.sys 6.3.9600.18264

3123245 Update improves port exhaustion identification in Windows Server 2012 R2

https://support.microsoft.com/kb/3123245

Netstat -anoq

// The q is the new switch backported from Windows Server 2016.

2897602 FIX: TCP connections that use ephemeral loopback addresses are dropped suddenly in Windows

https://support.microsoft.com/kb/2897602

//  For apps that uses loopback addresses (127.0.0.x)

I h.t.h.,

Yong

Reference(s):

Detecting ephemeral port exhaustion
https://blogs.technet.microsoft.com/clinth/2013/08/09/detecting-ephemeral-port-exhaustion/

Server "Hangs" and Ephemeral Port Exhaustion issues
https://blogs.technet.microsoft.com/kimberj/2012/07/06/server-hangs-and-ephemeral-port-exhaustion-issues/

Port Exhaustion and You (or, why the Netstat tool is your friend)
https://blogs.technet.microsoft.com/askds/2008/10/29/port-exhaustion-and-you-or-why-the-netstat-tool-is-your-friend/

Dynamic Ports in Windows Server 2008 and Windows Vista (or: How I learned to stop worrying and love the IANA)
https://blogs.technet.microsoft.com/askds/2007/08/24/dynamic-ports-in-windows-server-2008-and-windows-vista-or-how-i-learned-to-stop-worrying-and-love-the-iana/