We're found that adjusting the timeouts on the FastL4 profile applied to our FTPS on our 3600s directly affects the FTPS transfers - if we have set a 30 second timeout the transfer will reset after that time. However I would expect it to behave this way based on the distribution of the FTPS control and data connections between the TMM and PVA. As I understand the TCP of the control connection will sit idle and eventually timeout. As I understand since the Viprions do not contain PVAs and i'm wondering if this will still be an issue on them?