What is the Default Maximum Number of TCP Connections ?

What is the Default Maximum Number of TCP Connections on the server ?

Can this be increased and how ?

Recently, we experienced an unusual delay in starting our application.
Using the NESTAT command, I can see over 100 TCP connections in various
states.

TIA

"TIA" wrote:

> What is the Default Maximum Number of TCP Connections on the server ?
>
> Can this be increased and how ?
>
> Recently, we experienced an unusual delay in starting our application.
> Using the NESTAT command, I can see over 100 TCP connections in various
> states.
>
> TIA

The maximum number of connections for Windows 2003 is 16 million, but in
practice this is limited by the number of available dynamically assigned
ports, the range of which on 2003 is from 1025 to 5000 by default - yielding
3975 possible concurrent connections.

You can increase the number of available ports by changing / creating the
following registry value:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Servic es\Tcpip\Parameters\MaxUserPort

This is a REG_DWORD value, the default is (decimal) 5000 but you can set a
maximum value of (decimal) 65534

Alister

Thank you Alister for making it clear !

"Alister" wrote:

>
>
> "TIA" wrote:
>
> > What is the Default Maximum Number of TCP Connections on the server ?
> >
> > Can this be increased and how ?
> >
> > Recently, we experienced an unusual delay in starting our application.
> > Using the NESTAT command, I can see over 100 TCP connections in various
> > states.
> >
> > TIA
>
> The maximum number of connections for Windows 2003 is 16 million, but in
> practice this is limited by the number of available dynamically assigned
> ports, the range of which on 2003 is from 1025 to 5000 by default - yielding
> 3975 possible concurrent connections.
>
> You can increase the number of available ports by changing / creating the
> following registry value:
>
> HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Servic es\Tcpip\Parameters\MaxUserPort
>
> This is a REG_DWORD value, the default is (decimal) 5000 but you can set a
> maximum value of (decimal) 65534
>
> Alister