I am in need of troubleshooting a situation where a user wants to access the load balanced web application (J2EE) with an application called "portal drive".
From my understanding this application utilizes the WebDAV extension and is more or less WebDAV client with "explorer" functionalities.
Application team now complains about following symptoms:
- The Portal Drive client connects to the rservers directly just fine.
- PortalDrive client won't connect using the VIP.
Therefore i sniffed the setup from my client to the VIP and i can see following behavior.
After the initial TCP setup the first HTTP Request used is "Method: OPTIONS". After this request the ACE sends and RST,ACK and drops the connection. This happens every time i connect using the VIP.
So now my approach to find the root cause circles around the two following scenarios.
A: ACE does not support a first request with Method OPTION.
B: After the initial request trough the VIP address the server maybe has to be SNAT'ed into the client side vlan.
I hope you guys have an idea how to fix this.
Thanks for reading