Cisco Firepower 2130 backup file extension?

[DSterling]

I'm  downloading the backup of our Cisco Firepower 2130 FW using FDM to my Windows 10 machine.  The issue I'm having is that the Windows firewall is blocking the download. I change the file name of the download to a .txt file and it downloads. I'm wanting to know what extension I need to change the backup file extension too after downloading it as a .txt.? 

Thank you, 

[MHM Cisco World]

I think it .py

And did you check that tftp port is open in win fw?

[DSterling]

I can't change the windows firewall settings, it requires a ticket and approval, it can take a while (on a secure network), it's easier to change the extension to a .txt and then change it back. 

[Rob Ingram · Accepted solution]

@DSterling I checked, the downloaded FDM backup file does not have an extension.

FWIW, you can extract the contents of the backup and within the backup file is a .bin and .manifest file.