How to: Concurrent connections limit enable/disable in vista sp2

[ZeroHour]

Hey,

In Vista SP2 it appears the 10 half open concurrent connections limit has been removed but if you want to enable it you can do as listed below in the registry :

Click Start

type regedit in the Start Search box, and then click regedit.exe in the Programs list.

If you are prompted for an administrator password or for confirmation, type your password, or click Continue.

 

Locate and then double-click the following registry key:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\EnableConnectionRateLimiting

If it does not exist make a new DWORD

 

In the Value data box, type 1, and then click OK.

 

NOTE: 2008 SP2 has a similar key for its use.

 

And thats it turned on again. If you set it to 0 its off which I believe is the default anyway.

 

MS Article: http://support.microsoft.com/kb/969710

[Michael]

I'm confused, I always thought the max number of concurrent connections on 2000/XP/Vista and 7 was 10 connections.

 

I still remember admins using Windows 98 as a file server. It didn't have the concurrent limit associated with it.

[Arthur]

The key word here is outbound...

 

SP2 removes the limit of 10 half open outbound TCP connections. By default, SP2 has no limit on the number of half open outbound TCP connections.

 

The inbound connection limit remains the same. Running net config server from an elevated Command Prompt will tell you how many connections are allowed for your operating system (it should be 10 for XP Pro and 20 for Windows 7).