Subnet — Reference
Subnet List Columns
The Network → Subnets page displays the subnets of the current VPC with the following columns:
| Column Name | Description |
|---|---|
| Name | The subnet name set by the user at creation. |
| Tags | The tags (key–value pairs) attached to the subnet. |
| CIDR | The subnet's IP address range (CIDR notation, e.g. 192.168.1.0/24). |
| Gateway | The subnet's gateway IP address. |
| DNS servers | The list of DNS server addresses configured for the subnet (Primary and Secondary, if set). |
| Created At | The time the subnet was created (UTC). |
Fields in the "Create subnet" Form
| Field | Required | Description |
|---|---|---|
| Name | Yes | The identifying name of the subnet. Must be unique within the same VPC. |
| Type | Yes | The subnet type. See the Subnet Types table below. |
| Network address (CIDR) | Yes | The subnet's IP address range in CIDR notation (e.g. 10.0.1.0/24). Must not overlap with any other subnet in the same VPC. |
| Gateway IP | Yes | The subnet's gateway IP address. Must fall within the declared CIDR range. |
| Static IP pool | No | A sub-range of addresses (within the CIDR) reserved for static allocation. If left blank, the system manages the entire address range automatically. |
| Primary DNS | No | The primary DNS server address that resources in the subnet will use for domain name resolution. |
| Secondary DNS | No | A backup DNS server address, used when the Primary DNS is unresponsive. |
| Add tag | No | Allows attaching one or more tags (key–value pairs) to categorize and manage the subnet. |
Subnet Types: Routed vs Isolated
| Type | Internet Routing | Typical Use Cases |
|---|---|---|
| Routed | Yes — outbound traffic is routed through the NAT gateway | Application servers (web, API) that need outbound connectivity to download patches, call external services, or update software. |
| Isolated | No — the subnet is completely isolated from the Internet | Database servers, internal caches, or any workload that requires high security and does not need direct Internet access. |
Note: The subnet type is selected at creation time and cannot be changed after the subnet has been created.