Re: WinXP and 2K: Inbound Connections Limited to 10?

From: Arkady Frenkel (arkadyf_at_hotmailxdotx.com)
Date: 01/31/05 

Date: Mon, 31 Jan 2005 09:24:24 +0200

Warren Young in http://tangentsoft.net/wskfaq/advanced.html#maxsockets
wrote about ~25000 but as I wrote that not a limit for W2K Pro
Arkady

"Arkady Frenkel" <arkadyf@hotmailxdotx.com> wrote in message
news:ewjQkT2BFHA.4008@tk2msftngp13.phx.gbl...
> That number of simultaneously opened sockets. That mean that server (
> application ) have queue of opening sockets ( during period between
> listen() and accept() )
> equal 5 ( 10 ). That have a name backlog.
> But if your clients ask for connect not simultaneously you'll have no
> problem to support much more.
> Arkady
>
> "Robert Bogard" <RobertBogard@nospam.hotmail.com> wrote in message
> news:ukUVY5kBFHA.4008@tk2msftngp13.phx.gbl...
>> Hi all,
>>
>> I'm trying to write a Windows-based server with a design goal of handling
>> around 150 clients simultaneously. Minimum OS would be Win2k or WinXP.
>> The
>> server would be written using pure Winsock API calls (i.e., not with
>> MFC's
>> CSocket or CAnyncSocket), TCP/IP protocol, and would be accessed over the
>> Internet.
>>
>> I'm trying to understand the significance of this MSDN KB article
>> "Inbound
>> connections limit in Windows XP" found at
>> http://support.microsoft.com/default.aspx?scid=kb%3Ben-us%3B314882 .
>> According to the article:
>>
>> Quote:
>> For Windows XP Professional, the maximum number of other computers that
>> are
>> permitted to simultaneously connect over the network is ten. This limit
>> includes all transports and resource sharing protocols combined. For
>> Windows
>> XP Home Edition, the maximum number of other computers that are permitted
>> to
>> simultaneously connect over the network is five.
>>
>>
>>
>> (There is a similar article for Win2k at
>> http://support.microsoft.com/kb/128167/EN-US/ )
>>
>> It was my understanding that this limit of 10 connections was a limit
>> only
>> on incoming connections established for the purpose of sharing resources
>> of
>> the workstation (like printers and drives), or incoming connections
>> established when running Microsoft's IIS web server. Specifically, I did
>> not
>> think that incoming connections established with my server would count
>> toward the limit of 10. For example, the same page cited above also
>> includes
>> this:
>>
>> Quote:
>> Per development: The connection limit refers to the number of
>> redirector-based connections and is enforced for any file, print, named
>> pipe, or mail slot session. The TCP connection limit is not enforced, but
>> it
>> may be bound by legal agreement to not permit more than 10 clients.
>>
>> There seems to be a few discussions on the IIS newsgroups that suggest
>> that
>> my server would not be limited. For example, some have said that an
>> Apache
>> web server is not limited to 10 inbound connections, even when running on
>> WinXP Home/Pro. This to me suggests that plain-vanilla inbound TCP
>> connections are not limited to 10. One example is
>> http://groups-beta.google.com/group/microsoft.public.inetserver.iis/browse_thread/thread/19c42d3e29d1e817/808852bccfd9fbca
>>
>> So, my question is, would my server be limited by the
>> 10-inbound-connection
>> limit?
>>
>> And if so, short of specifying a minimum OS of Windows Server Edition, is
>> there any way to overcome the limit?
>>
>> Robert
>>
>> PS: Please note from the headers that I have posted this to two groups
>> simultaneously
>>
>>
>
>

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