Thanks... Two issues found. 1. I had missed a hidden drop down NAT box at the bottom of the Add Device windows.. 2. Licenses installed initially using ASADM could not then be transferred to the Firepower manager without involving licencing  Many than...

I too have a similar problem on  between a firepower manager (version 6.0.0 build 1005) on the core network and Sourcefire module  version 6.00 on an ASA in the dmz. Communications between the two devices are bi-directiona on tcp/8305 and you can see...