Configuring Network Ranges for a Site

The Native Range for the site is the IP range that you configured for each LAN interface when you created the site. You can configure additional LAN network ranges with their own IP address ranges.

The types of networks that you can add depends on the site's Connection Type:

For more information about configuring DHCP settings for a network range, see Configuring DHCP Settings.

Use the Networks section to define the network ranges for each LAN interface configured for the site. The IP addresses cannot use /31 or /32 CIDR blocks.

Best Practice: All sites in your account use unique network ranges for optimal troubleshooting and avoiding route loops. However, if two or more sites in your account use overlapping IP address ranges, you must enable and configure Static Range Translation. For more information, see, Configuring System Settings for the Account.

These are the types of network IP ranges that you can create:

For more about configuring DHCP settings for a network range, see Configuring DHCP Settings.

Internet Only IP Ranges

You can configure a network range to only provide access to the Internet without the possibility of communicating with the WAN. Internet Only ranges can be configured in multiple sites with identical IP ranges. This simplifies network management and improves security for guest services, such as guest WiFi.

Internet Only network ranges are not propagated to the global routing table maintained in the Cato Cloud, and are managed locally in the Socket. Hosts within this range can access Internet applications based on the site's Internet firewall settings.

Cato recommends as a best practice for the security of guest WiFi networks to use Internet Only ranges together with the Cato captive portal.

Internet-Only ranges require a physical Socket with version 23 and higher, and support the following:

• DHCP configurations

• Local port forwarding

• LAN Firewall configurations

• Bypass rules

The following known limitations apply to Internet Only ranges:

• Route Via settings can’t be used with Internet Only ranges. Hosts on an Internet Only network egress only from the PoP connected to the local Socket.

• Remote Port Forwarding is not supported for internet-only ranges.

• Native ranges cannot be configured as internet-only.

To create an IP address range for a LAN interface:

1. From the navigation menu, click Network > Sites and select the site.

2. From the navigation menu, click Site Configuration > Networks.

3. Expand the LAN interface.

4. From the LAN interface, click New to add a new network segment for the IP range.

   The New Interface IP Range panel opens.

5. Enter the Name for the IP range.

6. From the Type drop-down menu, select the type of IP range: Direct, Routed, or VLAN.

   Note: VLAN ranges are supported only for physical Sockets and ESX vSockets.

7. Enter the Subnet and IP settings based on the range type:

   • For Direct and VLAN ranges, enter the Local IP. This is the IP address for the Cato LAN port.

   • For Routed ranges, enter the Gateway. This is the next hop IP address for the neighboring router.

8. For VLANs, enter the VLAN ID for this range.

9. (Optional) Configure the DHCP settings for this range, from the DHCP Range drop-down menu select one of these options:

   • Disabled - DHCP is disabled for this range

   • Account Default - this range uses the default DCHP settings for the account

   • DHCP Range - Enter the range of IP addresses that the DHCP server assigns for this segment

10. (Optional) Configure Additional Settings for the range:

    • To configure the range as Internet Only, under Routing Type, select Internet Only.

    • To enable mDNS on a VLAN, under Multicast, select mDNS Gateway. For more information, see Enabling mDNS Between Subnets.

11. Click Apply. The New Interface IP Range panel closes.

12. Click Save. The IP address range is created.

Before you can delete a network range, make sure that it isn't used somewhere else in the Cato Management Application, such as network or firewall rules. In addition, make sure that no hosts are configured for that range (in Network > Site Settings > Host).

In some cases, you may need to define a special security policy for a segment of IP addresses that are part of a bigger network range. For example, within 10.0.0.0/24, the 10.0.0.0/27 block has different security requirements.

To support such cases, you can define a network range within a site that is a subset of an existing range in the same site. Then, use the item for that network sub-range in a security policy (such as a firewall rule).