Handling inbound and outbound connections through the same LB node?

First, let me say that this is tricky business. That being said, you have a couple of options. Since your device is transparent at L3, you can try hash mode persistence or using the session table. On the client side, you would hash on the source address and on the serverside you would hash on the destination address.

 

 

The other option is to use related connections rather than a wildcard network virtual sandwich. For FTP and similar protocols, the control channel describes the related connections even if they are initiated by the server. The idea is to parse the control protocol and then create one or more related connections. Follow the links below for some info on related connections.

 

Click here

 

Click here

 

 

Good luck!