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Hello Expert: 
 
We have an IIS Server running in Windows Server 2003 R2 SP3. 
 
An ASP.Net application is running and after checking the HTTP error log we have found 98% of the error occurred due to the following reason: 
 
2012-05-23 19:14:58 REMOTEIP 3887 SERVERIP 80 HTTP/1.1 POST /CRMAPPS/CRMAPPSSFolder/ImageUpload.aspx?Source=Upload+Self+Report 400 1 BadRequest CRM 
 
The above page is using for images, scanned documents and reports upload. 
 
We have internal as well as external users who are connected via VPN. 
 
External users connect to our server using Cisco ASA 5510 switch where as internal network uses NETGEAR 100 mbps and Dell 1 gbps. 
 
Please also note that the file server and IIS server is same right now. 
 
What could be the possible reasons for failure and what could be the possible solutions? 
 
Any help would be appreciated. 
 
Thanks in Advance!
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Hello Expert:

We have an IIS Server running in Windows Server 2003 R2 SP3.

An ASP.Net application is running and after checking the HTTP error log we have found 98% of the error occurred due to the following reason:

2012-05-23 19:14:58 REMOTEIP 3887 SERVERIP 80 HTTP/1.1 POST /CRMAPPS/CRMAPPSSFolder/ImageUpload.aspx?Source=Upload+Self+Report 400 1 BadRequest CRM

The above page is using for images, scanned documents and reports upload.

We have internal as well as external users who are connected via VPN.

External users connect to our server using Cisco ASA 5510 switch where as internal network uses NETGEAR 100 mbps and Dell 1 gbps.

Please also note that the file server and IIS server is same right now.

What could be the possible reasons for failure and what could be the possible solutions?

Any help would be appreciated.

Thanks in Advance!

HTTP Error Log Contains too much 400 response

A web server refers to the software that helps to deliver web content that can be accessed either through the Internet or through an intranet. The primary function of a web server is to store, process and deliver web pages to clients. The communication between client and server takes place using the Hypertext Transfer Protocol (HTTP). The most common use of web servers is to host websites, but there are other uses such as gaming, data storage, running enterprise applications, handling email, FTP, etc.

Web Servers

IIS is Internet Information Services, the web server included with Windows Server operating systems. All current versions are built on a modular architecture; modules can be added or removed individually so that those required for specific functionality are installed. The full installation of IIS includes HTTP, security, content, compression, caching, logging and diagnostics.

Microsoft IIS Web Server

Networking hardware includes the physical devices facilitating the use of a computer network. Typically, networking hardware includes gateways, routers, network bridges, modems, wireless access points, networking cables, line drivers, switches, hubs, and repeaters. But it also includes hybrid network devices such as multilayer switches, protocol converters, bridge routers, proxy servers, firewalls, network address translators, multiplexers, network interface controllers, wireless network interface controllers, ISDN terminal adapters and other related hardware.

Networking Hardware-Other

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