Cisco Firepower 2100 Getting Started Manual page 42

Complete the FTD Initial Configuration Using FDM
b) If you chose Yes, then enter the FMC Hostname/IP Address.
c) Specify an FMC Registration Key.
This key is a one-time registration key of your choice that you will also specify on the FMC when you
register the FTD. The registration key must not exceed 37 characters. Valid characters include
alphanumerical characters (A–Z, a–z, 0–9) and the hyphen (-). This ID can be used for multiple devices
registering to the FMC.
d) Specify a NAT ID.
This ID is a unique, one-time string of your choice that you will also specify on the FMC. This field is
required if you only specify the IP address on one of the devices; but we recommend that you specify the
NAT ID even if you know the IP addresses of both devices. The NAT ID must not exceed 37 characters.
Valid characters include alphanumerical characters (A–Z, a–z, 0–9) and the hyphen (-). This ID cannot
be used for any other devices registering to the FMC. The NAT ID is used in combination with the IP
address to verify that the connection is coming from the correct device; only after authentication of the
IP address/NAT ID will the registration key be checked.
Step 7
Configure the Connectivity Configuration.
a) Specify the FTD Hostname.
b) Specify the DNS Server Group.
Choose an existing group, or create a new one. The default DNS group is called
CiscoUmbrellaDNSServerGroup, which includes the OpenDNS servers.
c) For the FMC Access Interface, choose management.
Step 8 Click Connect. The FMC Registration Status dialog box shows the current status of the switch to FMC.
After the Saving FMC Registration Settings step, go to FMC, and add the firewall.
Figure 15: FMC Registration Status
If you want to cancel the switch to FMC, click Cancel Registration. Otherwise, do not close the FDM browser
window until after the Saving FMC Registration Settings step. If you do, the process will be paused, and
will only resume when you reconnect to FDM.
Cisco Firepower 2100 Getting Started Guide
40
Firepower Threat Defense Deployment with FMC