What are the possible causes for many TCP port connections that are in a CLOSE_WAIT and TIME_WAIT status on a Windows 2008 Server? I see this when I run a netstat on the server and whoever attempts to log into the server is having problems connecting. Thanks for your rapid response.

CLOSE_WAIT Indicates passive close. Server just received first FIN from a client. As an example, consider the following scenario: A socket application has been terminated, but Netstat reports the socket in a CLOSE_WAIT state. This could indicate that the client properly closed the connection (FIN has been sent), but the server still has its socket open. This could be the result of one instance (among all threads or processes) of the socket not being closed. NOTE: It is normal to have a socket in the TIME_WAIT state for a long period of time. The time is specified in RFC793 as twice the Maximum Segment Lifetime (MSL). MSL is specified to be 2 minutes. So, a socket could be in a TIME_WAIT state for as long as 4 minutes. Some systems implement different values (less than 2 minutes) for the MSL. For more information, refer to this Microsoft article. This posting is provided "AS IS" with no warranties or guarantees , and confers no rights. Microsoft Student Partner Microsoft Certified Professional Microsoft Certified Systems Administrator: Security Microsoft Certified Systems Engineer: Security Microsoft Certified Technology Specialist: Windows Server 2008 Active Directory, Configuration Microsoft Certified Technology Specialist: Windows Server 2008 Network Infrastructure, Configuration

Hi, Thanks for posting here. In addition with Mr X’s explanation , you may also refer to Jane Lewis's blog post that discussed this scenario and also provide some good suggestions for this issue : Explaining Close_Wait http://blogs.technet.com/b/janelewis/archive/2010/03/09/explaining-close-wait.aspx Meanwhile, which services have been deployed on that server ? Thanks. Tiger Li TechNet Subscriber Support in forum If you have any feedback on our support, please contact tngfb@microsoft.comPlease remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

Hi, If there is any update on this issue, please feel free to let us know. We are looking forward to your reply. Tiger Li TechNet Subscriber Support in forum If you have any feedback on our support, please contact tngfb@microsoft.com Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.