HTTP Web Server: Invalid POST Request Exception

I have an application running on 8.0 server running on Windows 2000. All of a sudden in the middle of the afternoon yesterday, when users try to save a document, the server thows a “HTTP Web Server: Invalid POST Request Exception”. This app has replicas on two other servers running Windows 2003 without this problem. It also only happens using IE as the browser. If I test with Firefox or Safari, no problems. I have seen this before when users try to submit docs that exceed limits specified in the server doc but this is not the issue here. I have re-booted and still have the issue. Any ideas what else could be causing this?

Subject: log ! log !

Can you put your verbose log of server here when this happen ?

Subject: Here is the log entry

User Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; SLCC1; .NET CLR 2.0.50727; Media Center PC 5.0; .NET CLR 3.0.04506; InfoPath.2; .NET CLR 3.5.21022)Cookie: DomAuthSessId=6FF69D071513087C5B6C9982991B6F49

Request: POST /Risk%20Control/RCRepRec.nsf/Risk%20Report%20Vendor%20-%20Web?OpenForm&Seq=1&RequestUNID=9695AE8906971B6C852574FC003CF389&DocumentNumber=R08013036&RequestNumber=001&KeepThis=true HTTP/1.0

Status: 500 INTERNAL ERROR (The server could not fulfill the request because of an unexpected condition)

Content Length: 209 bytes

Content Type: text/html; charset=US-ASCII

Process Time: 62 ms

Error:

Translated URI: D:/Domino/Data/Risk Control/RCRepRec.nsf

Translated Request: Host/Risk%20Control/RCRepRec.nsf/Risk%20Report%20Vendor%20-%20Web?OpenForm&Seq=1&RequestUNID=9695AE8906971B6C852574FC003CF389&DocumentNumber=R08013036&RequestNumber=001&KeepThis=true

Decoded Query: OpenForm

Seq=1

RequestUNID=9695AE8906971B6C852574FC003CF389

DocumentNumber=R08013036

RequestNumber=001

KeepThis=true HTTP/1.0

Referring URL: http://host//Risk%20Control/RCRepRec.nsf/Risk+Report+Vendor+-+Web?OpenForm&RequestUNID=9695AE8906971B6C852574FC003CF389&DocumentNumber=R08013036&RequestNumber=001&KeepThis=true&

Decoded Query: OpenForm

RequestUNID=9695AE8906971B6C852574FC003CF389

DocumentNumber=R08013036

RequestNumber=001

KeepThis=true

Subject: Invalid POST Request Exception - RESOLVED

This was a misconfigured firewall interpreting the save of the document as an SQL Injection Attack. Bad firewall!

Subject: Plz provide for detail to issue and the fix

We are experiencing very similar error. File upload via web using IE6 works fine as long as file is less than 10MB is size.

The client in internal and so does not traverse a firewall.

Q: Was the culprit firewall and personal FW (ala Windows Firewall) or was it a border device (ala Pix, Checkpoint, Juniper?

Q: What adjustment to the firewall or to the server was put in place to get your fix?

Our Server config Doc upload max was set to 10MB for years…I’ve adjusted it to 0 (unlimited) and now finally to 40MB…yet this has not made the difference. Yes, server was rebooted after change.

The issue behaves the same with Firefox.

Your details are appreciated.