IIS FTP is a stable and comparable simple service running in Inetinfo.exe. We seldom face performance issues regarding FTP itself, most of them are caused by network connection or system wide performance issue. Here is one interesting FTP performance...

Symptom: The FTP client is a .net client application. It invokes wininet.dll to download files from FTP. The application downloads ftp files much slower than FTP.exe and other 3 rd party ftp client application. Its speed is <500kb with a 1000M...

Here is a case we recently worked on about Kerberos authentication issue. Symptoms: Assume there is a web site which provides search functions under virtual directory with the Integrated Windows authentication. When clients use FQDN access the...

Recently, we got an issue from customer. They have a 32bit .Net application and use AdminIndexServer object to manage Indexing Service. Bellow error reported when running this application on 64bit Windows as there is no 32bit Indexing Service Admin Object...

MSDTC is the important Transaction service on window system. COM+ system, or other OLE/XA resource managers (such as SQL, MS Oracle client) heavily depend on it. If the MSDTC doesn’t start, when we open Component Service UI or try to create transaction...

Install the certificate and set up an Implement an SSL Web Site in IIS. We checked the system and found that the settings (i.e. SSL port), file permission (i.e. MachineKeys folder: KB278381 ) and certificate are all right. Symptom: Browse HTTPS...

Symptom ============= In ASP.NET web application, if you do a lot of GetElementsByTagName() operations with an XML document which is stored in ASP.NET Application state, the CLR memory usage will continuously increase and finally leads to OOM(Out...

In .NET Framework 2.0, System.Net has a new feature called Tracing. System.Net Tracing is very useful for some special scenarions: - Client and server are on the same machine, in case of this network monitor doesn’t work for you as it can’t capture...

Problem: ======= In BizTalk 2004 SP2, no result returns when click the button “Run Query” in HAT [Operations -> Service Instances] or [Operations ->Messages]. Some other queries in HAT such as [Queries->Message counts] still work fine...

While we open Catalog Business Tool, and click the “Refresh site cache” link, we may get this HTTP 401 error message: The server 'MyServer' of the application 'OrdersWebService' returned HTTP status code 401 (Unauthorized). The cache refresh URL...

Customer had a newly developed .NET web application hosted in IIS 6. They recently experienced some performance issues inc. slow response, high memory consumption etc. We did a first tier analysis and decided to collect IIS crash dump. After a long monitoring...

Randomly, IE will show follow error when customer accessing their web application. Meantime, ASP.NET event 1310 will recorded as well. According to KB 821268 and MSDN , this is the recommended setting for a two CPU system (Dual core is considered as 2...

There are several cases that got to me regarding the MSMQ “Insufficient resource” error (MQ_ERROR_INSUFFICIENT_RESOURCES). Most of them can be pinpointed by performing the following troubleshooting steps. So I think it deserves sharing with you. ...