Server 2008 (R2) TCP/IP Stack sending RST to close short lived sessions

Hi,
I'm having an issue with some vendor software, but it appears to be more closely related to the way the TCP/IP stack is handling session shutdown. I'd like to know what this feature is called, any available documentation, and ideally how to disable it.
Basically, what appears to happen, is Server 2008 is sending a Rst, Ack to terminate a short lived connection, instead of entering the standard TCP shutdown (Using FIN flags). This appears to be an attempt to avoid having short lived sessions sit in a
TIME_WAIT state, as I can see long TCP connections properly being shutdown.
I realize the benefits of what this is trying to accomplish, however, the software in question is making HTTP calls, and the server being rather basic, is sending HTTP responses without content-length or transfer encoding: chunked, which means the only
way to tell the server is done sending content is for the connection to close. However, it appears that the stack is interpreting this type of Tcp shutdown as in error, and generating annoying alerts within the application that is monitoring the close state.
Does windows have a way to disable this stack feature. I've confirmed the chimney offload doesn't appear to be in use, so this is an effect of the Windows stack itself. I don't have control of the software on either end, but do have a bug open with the vendor,
I'm more interested in a possible workaround for the short term.
** Entire connection lasts ~1 second
Internet Protocol, Src: 172.25.149.231 (172.25.149.231), Dst: 172.25.147.172 (172.25.147.172)
Transmission Control Protocol, Src Port: 49740 (49740), Dst Port: 8089 (8089), Seq: 0, Len: 0
Flags: 0x02 (SYN)
Internet Protocol, Src: 172.25.147.172 (172.25.147.172), Dst: 172.25.149.231 (172.25.149.231)
Transmission Control Protocol, Src Port: 8089 (8089), Dst Port: 49740 (49740), Seq: 0, Ack: 1, Len: 0
Flags: 0x12 (SYN, ACK)
Internet Protocol, Src: 172.25.149.231 (172.25.149.231), Dst: 172.25.147.172 (172.25.147.172)
Transmission Control Protocol, Src Port: 49740 (49740), Dst Port: 8089 (8089), Seq: 1, Ack: 1, Len: 0
Flags: 0x10 (ACK)
Internet Protocol, Src: 172.25.147.172 (172.25.147.172), Dst: 172.25.149.231 (172.25.149.231)
Transmission Control Protocol, Src Port: 8089 (8089), Dst Port: 49740 (49740), Seq: 1, Ack: 2921, Len: 0
Flags: 0x10 (ACK)
Internet Protocol, Src: 172.25.149.231 (172.25.149.231), Dst: 172.25.147.172 (172.25.147.172)
Transmission Control Protocol, Src Port: 49740 (49740), Dst Port: 8089 (8089), Seq: 2921, Ack: 1, Len: 1234
Flags: 0x18 (PSH, ACK)
Internet Protocol, Src: 172.25.147.172 (172.25.147.172), Dst: 172.25.149.231 (172.25.149.231)
Transmission Control Protocol, Src Port: 8089 (8089), Dst Port: 49740 (49740), Seq: 1, Ack: 4155, Len: 57
Flags: 0x18 (PSH, ACK)
Internet Protocol, Src: 172.25.149.231 (172.25.149.231), Dst: 172.25.147.172 (172.25.147.172)
Transmission Control Protocol, Src Port: 49740 (49740), Dst Port: 8089 (8089), Seq: 4155, Ack: 58, Len: 0
Flags: 0x10 (ACK)
Internet Protocol, Src: 172.25.147.172 (172.25.147.172), Dst: 172.25.149.231 (172.25.149.231)
Transmission Control Protocol, Src Port: 8089 (8089), Dst Port: 49740 (49740), Seq: 58, Ack: 4155, Len: 1024
Flags: 0x18 (PSH, ACK)
Internet Protocol, Src: 172.25.147.172 (172.25.147.172), Dst: 172.25.149.231 (172.25.149.231)
Transmission Control Protocol, Src Port: 8089 (8089), Dst Port: 49740 (49740), Seq: 1082, Ack: 4155, Len: 1460
Flags: 0x18 (PSH, ACK)
Internet Protocol, Src: 172.25.149.231 (172.25.149.231), Dst: 172.25.147.172 (172.25.147.172)
Transmission Control Protocol, Src Port: 49740 (49740), Dst Port: 8089 (8089), Seq: 4155, Ack: 2542, Len: 0
Flags: 0x10 (ACK)
Internet Protocol, Src: 172.25.147.172 (172.25.147.172), Dst: 172.25.149.231 (172.25.149.231)
Transmission Control Protocol, Src Port: 8089 (8089), Dst Port: 49740 (49740), Seq: 2542, Ack: 4155, Len: 1460
Flags: 0x18 (PSH, ACK)
Internet Protocol, Src: 172.25.147.172 (172.25.147.172), Dst: 172.25.149.231 (172.25.149.231)
Transmission Control Protocol, Src Port: 8089 (8089), Dst Port: 49740 (49740), Seq: 4002, Ack: 4155, Len: 1460
Flags: 0x18 (PSH, ACK)
Internet Protocol, Src: 172.25.147.172 (172.25.147.172), Dst: 172.25.149.231 (172.25.149.231)
Transmission Control Protocol, Src Port: 8089 (8089), Dst Port: 49740 (49740), Seq: 5462, Ack: 4155, Len: 1460
Flags: 0x18 (PSH, ACK)
Internet Protocol, Src: 172.25.147.172 (172.25.147.172), Dst: 172.25.149.231 (172.25.149.231)
Transmission Control Protocol, Src Port: 8089 (8089), Dst Port: 49740 (49740), Seq: 6922, Ack: 4155, Len: 1081
Flags: 0x18 (PSH, ACK)
Internet Protocol, Src: 172.25.149.231 (172.25.149.231), Dst: 172.25.147.172 (172.25.147.172)
Transmission Control Protocol, Src Port: 49740 (49740), Dst Port: 8089 (8089), Seq: 4155, Ack: 8003, Len: 0
Flags: 0x10 (ACK)
Internet Protocol, Src: 172.25.147.172 (172.25.147.172), Dst: 172.25.149.231 (172.25.149.231)
Transmission Control Protocol, Src Port: 8089 (8089), Dst Port: 49740 (49740), Seq: 8003, Ack: 4155, Len: 1460
Flags: 0x18 (PSH, ACK)
Internet Protocol, Src: 172.25.147.172 (172.25.147.172), Dst: 172.25.149.231 (172.25.149.231)
Transmission Control Protocol, Src Port: 8089 (8089), Dst Port: 49740 (49740), Seq: 9463, Ack: 4155, Len: 108
Flags: 0x18 (PSH, ACK)
Internet Protocol, Src: 172.25.149.231 (172.25.149.231), Dst: 172.25.147.172 (172.25.147.172)
Transmission Control Protocol, Src Port: 49740 (49740), Dst Port: 8089 (8089), Seq: 4155, Ack: 9571, Len: 0
Flags: 0x10 (ACK)
Internet Protocol, Src: 172.25.147.172 (172.25.147.172), Dst: 172.25.149.231 (172.25.149.231)
Transmission Control Protocol, Src Port: 8089 (8089), Dst Port: 49740 (49740), Seq: 9571, Ack: 4155, Len: 0
Flags: 0x14 (RST, ACK)

Rick, this did not help as it's the approach i've already taken in testing. Albeit, I did disable the chimney offload on the NIC drivers instead of the windows options, but in the wireshark captures I'm still seeing the same behavior.
Humand, I don't think you're issue is the same as mine, I beleive these RST, ACK's are in response to a NORMAL connection shutdown, and being interpretted as errors be the partner stack. I haven't seen this cause premature tcp shutdown, which would be you're
dropped RDP connections.
TCP Global Parameters
Receive-Side Scaling State : disabled
Chimney Offload State : disabled
NetDMA State : enabled
Direct Cache Acess (DCA) : disabled
Receive Window Auto-Tuning Level : disabled
Add-On Congestion Control Provider : ctcp
ECN Capability : disabled
RFC 1323 Timestamps : disabled

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I am new to the servers and domains stuff. Therefore i have setup succesfully a Server 2008 R2 server with AD, DHCP, DNS roles installed. I configured the roles as i wanted and then i installed Exchange Server 2010 so the clients can use Outlook to send
receive mails in and out of the domain.
I can send/receive mails inside the domain (disalfa.com) but i cannot send/receive mails outside the domain. I configured the Exchange properly, i am sure of that. I am 99,9% i did something wrong with the DNS (A records, MX records, etc.).
Also is there something i must do from the control panel of the site i purchased the domain name and the mails?
Can someone guide me so i can manage to work this out?
Server 2008 - 192.168.1.250
Registered Domain - disalfa.com
Thank you in advance

Hi ,
I recommend you refer to the following article to configure your external mail flow:
Configure Internet Mail Flow Directly Through a Hub Transport Server
Prerequisites
Register MX resource records for all accepted domains in a public domain name system (DNS) server. Consult the documentation of your DNS provider for information about how to register MX records for your domain. Detailed procedures about how to complete
this step are outside the scope of this topic.
Configure network gateways to allow SMTP traffic to and from the Hub Transport server. Consult the documentation for your network routers and firewalls for information about how to route SMTP traffic to and from the Hub Transport server. Detailed procedures
about how to complete this step are outside the scope of this topic.
Best regards,
Niko Cheng
TechNet Community Support

Send mail from windows server 2008

Hi all,
I have developed one web application on windows xp platform, which will send mails on request (using javamail api).
But it is not able to send mails from windows server 2008, what should I do .. ?
Thanks & Regards,
Abel

Thanks for reply.
Here my answers for above questions :
The web application which is deployed in the server is not able to send mails.
I'm not getting any exceptions.
I don't know what the protocol trace show.
I don't know how to debug my application, which was working fine in my development environment,but giving error result(not working fine in deployed system).
Regards,
Abel

Server 2008 - Task Scheduler - Send an E-mail fails

When ever we set an action to send an E-mail in the Server 2008 Task Scheduler GUI, we get a "Task failed" result of
"Cannot modify or delete an object that was not added using the COM+ Admin SDK (0x8004020D) once the task gets to that step.
I have tried creating tasks that do nothing but try and send an email using the new functionality of the Task Manager and it fails with the exact same error, So I have narrowed it down to the email action being the culprit. As soon as I remove it from the other tasks, everything works as planned.
Is there a fix for this? Is there a permission I need to set somewhere? It seems that some people have tried running the task as the "Network Service" and it works, but I have had no such luck yet.

Hi,
If a task attempts to send an e-mail, but the e-mail doesn't get sent correctly, first make sure that the settings for the e-mail action on the task are set correctly. The e-mail action must have a valid value for the SMTP server, To, and From settings. For more information about these settings, please refer to the following article:
Actions
http://technet.microsoft.com/en-us/library/cc722129.aspx
Make sure the SMTP server that sends the e-mail is setup correctly. E-mail is sent using NTLM authentication for Windows SMTP servers, which means that the security credentials used for running the task must also have privileges on the SMTP server to send e-mail. If the SMTP server is a non-Windows based server, then the e-mail will be sent if the server allows anonymous access.
For information about setting up the SMTP server, please see the following article:
SMTP Server Setup
http://www.microsoft.com/technet/prodtechnol/WindowsServer2003/Library/IIS/e4cf06f5-9a36-474b-ba78-3f287a2b88f2.mspx?mfr=true
And for information about managing SMTP server settings, please see the following article:
SMTP Administration
http://technet.microsoft.com/en-us/library/cc758258.aspx
Hope it helps.
Tim Quan - MSFT

Edge Server send RST packet to Client

Hi all,
I'm meeting an issue, please help me!
I'm setting up a testing LAB. After I deployed Edge Server, everything may be fine. But Client connects to Edge server, after TLS handshake, the server send RST packet to
Client. Please refer picture below.
I used CA built on Domain Controller server to assign Cert to internal and external interface of Edge server. I know I should use a public CA on Internet to assign Cert to external interface, but I'm setting LAB for testing, so I used internal CA. And my
domain internal and external are the same (e.g: internal is edge.sip96x2.com and external is access.sip96x2.com). From Client, I installed Root CA Cert downloaded from CA on Domain Controller. Client from external doesn't
have DNS server, instead of using Hosts file, the Host file includes:
"100.20.252.12 access.sip96x2.com"
I don't know what is information need to show here, if you required any information, please let me know, thanks so much!

To work with your Lync Client from External over the edge, the Lync Client has to reach
Access Edge, Audio/Video Edge and Web Edge IP.
To login to your Lync Edge you can use the lync Manual Configuration access.sip96x2.com:443.
You should use the host fqdn for internal Connection and the three needed External FQDN for the edge.
To use a private CA ist allways possible for a Lab.
http://ocsguy.com/2010/11/21/deploying-an-edge-server-with-lync/
regards Holger Technical Specialist UC

Consequences of disabling NetBIOS over TCP/IP in a Windows Server 2008 environment

Is NetBIOS required in a network with 2008 Servers and Windows 7 and Windows 8 computers?
There are two 2003 and one 2000 server.
What functionality would we loose?
What are the major server functions or major applications that use NetBIOS.
Is there any way to find if any application or server is relying on NetBIOS.
Any help is much appreciated.

Generally it is the browser service that populates network neighborhood. This technology is no longer used with newer OS like server 2008, windows 7/8.
Description of the Microsoft Computer Browser Service
Regards, Dave Patrick ....
Microsoft Certified Professional
Microsoft MVP [Windows]
Disclaimer: This posting is provided "AS IS" with no warranties or guarantees , and confers no rights.

Windows server 2008 R2 Enterprise Service Pack 1 - TCP/IP Registry settings

I am facing the issue while making TCP/IP connections. This issue is occuring sometimes and not usual.
No connection could be made because the target machine actively refused it 127.0.0.1:8056.
This issue is due to server has full backlog.
Questions - Where to check the server backlog for TCP/IP requests?
How to tune the TCP/IP requests? Do we need to add any registry settings? Impact of those settings?
Any help is really appreciated.

These ones may help.
http://blogs.msdn.com/b/sql_protocols/archive/2006/03/09/546852.aspx
http://support.microsoft.com/kb/328476
Regards, Dave Patrick ....
Microsoft Certified Professional
Microsoft MVP [Windows]
Disclaimer: This posting is provided "AS IS" with no warranties or guarantees , and confers no rights.

Server 2008 (R2) TCP/IP Stack sending RST to close short lived sessions

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