We have a customer who is running an application which is load balanced through CSS and SSL offloading is performed by CSS. Customer is testing a newer version of the same application through CSS by offloading SSL on CSS and some of the functionality of the Application is not working. The difference between the two versions of the application is that the previous version uses asp and it's database is run on MS-SQL2000 server and for the new version which the customer is testing is using aspx with .NET and database is run on MS-SQL2008 server.
Configuration on CSS is pretty straight forward(443 on front end and port 80 on backend) and it is configured the exact same way as the previous application version is configured.
CSS's are in Box-to-Box redundancy and are one-armed.(CSS is running 8.20 code) with SSL module
Everything works fine on the application with SSL offload except for a search function(search function uses XML to call a java script),as soon as the user invokes the serach he gets an error on the web page. (Error is attached to the discussion)
We have tried the following tests and application works fine:
1. Launching the application by directly going to server real IP address on port 443
2. Launching the application by directly going to URL on port 80
3. Launching the application by using vip address on port 80
4. Launching the application by configuring the CSS in passthrough for port 443
Application's search function fails when SSL is offloaded on CSS otherwise it works fine. We have taken several sniffer captureson client and server side but we have not found anything conclusive that points us to an issue. We have contacted Cisco TAC but they are also not able to debug the issue.
Can somebody help us understand as to what is going on. (I can provide all the sniffer traces as well as the topology diagram)