Device Security
Focus
Focus
Device Security

Device Security

Table of Contents


Device Security

Device Security maps devices to sites based on IP addresses or firewall locations.

IP Address-based Site Assignment

This method for mapping devices to sites uses IP addresses and is the only site-mapping method available to new Device Security tenants starting in March 2022.
If you have not done so already, enter or upload a CSV file of the IP address blocks of your sites in CIDR notation on NetworksNetworks and SitesNetworks. (Examples of CIDR notation: 10.55.0.0/16 and 10.197.0.0/16.) Then click AddAdd a Subnet and enter the network address in CIDR notation and a description, or click AddUpload Subnets and upload multiple subnets using the provided template.
You don’t need to use all the subnets that belong to a site for site mapping. Instead, pick the largest subnet (IP address block) for site assignment. For example, one site might have numerous subnets such as 10.55.10.0/24, 10.55.28.0/24, and 10.55.121.0/24, all of which are within a single IP block of 10.55.0.0/16. In this case, use 10.55.0.0/16 for site mapping. Device Security automatically assigns smaller subnets within the site-mapping IP block to the same site and assigns devices within each subnet to the same site as that of their subnet.
After adding or uploading subnets, assign them to sites on NetworksNetworks and SitesSites. Either click the Create Site ( + ) icon to the upper right of the Sites table or click the three vertical dots icon at the far right of the row for a previously created site and then click Edit Site.
Choose the subnets you added or uploaded on NetworksNetworks and SitesNetworks.
If you miss a subnet, Device Security won’t be able to link devices in the subnet to a site. When this happens, it assigns devices in this subnet to the Default site to which all the private IP ranges (10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16) are assigned for the purpose of catching any unassigned subnets.

Firewall-based Site Assignment

For Device Security tenants who onboarded before March 2022, Device Security uses firewall-based site assignments. After you finish onboarding a firewall, it appears on the NetworksNetworks and SitesNetworks page assigned to the Default Site. To reassign it to another site, click the three vertical dots icon in its row on the far right and then click Change Site.
Choose one of the sites in the Site Name list and then click Change.
Device Security maps the devices whose traffic metadata appears in the logs from this firewall to this site.
For information about creating sites, see Sites and Site Groups.
If you don’t assign a firewall to a site, Device Security won’t be able to link devices whose traffic appears in logs from this firewall to a site. When this happens, it assigns these devices to the Default Site.

Change Site Assignments from Firewalls to IP Addresses

Only a user with owner privileges can change from firewall-based site assignments to site assignments based on IP addresses.
For Device Security tenants who map devices to sites based on firewalls, Device Security provides an option to switch to the IP address-based approach. This is a one-time change. After switching to IP address-based site assignments, you can’t switch back to the firewall-based approach.
Select NetworksNetworks and SitesSites and click the gear icon (
) in the upper right of the Sites panel.
Switch from Firewall-based assignment to IP CIDR-based assignment and then Save.
As the note in the dialog says, it can take up to two days for Device Security to transition all devices to new sites and that during this time the site assignments for some devices might be incorrect.
Read the confirmation message that appears, recalling that this switch can’t be undone later, and when you’re ready, click Yes to continue.
After you finish setting up the IP CIDR blocks for site mapping and the new IP address-based site assignment method has had a couple days to establish device-to-site assignments, you can check NetworksNetworks and SitesNetworks to verify the configuration and make any adjustments if necessary.
Of particular interest is the Site Mapping column. When a subnet is linked to a site and its entry in the Site Mapping column is Yes, this indicates that the subnet has been manually mapped to the site. When a subnet is linked to a site but its entry in the Site Mapping column is No, it means that the subnet is a part of a larger IP address block that is mapped to the site and this subnet inherited its site mapping.
After switching device-to-site mapping from firewalls to IP addresses, Device Security removes filters for All connected sites and All disconnected sites. These filters are based on the status of firewall activity at a site, and after the switch, Device Security no longer links firewalls to sites.