--- title: Create DNS Firewall Cluster --- [Skip to content](#_top) [API Reference](https://developers.cloudflare.com/api/python) [DNS Firewall](https://developers.cloudflare.com/api/python/resources/dns_firewall) Copy Markdown Open in **Claude**Open in **ChatGPT**Open in **Cursor** --- **Copy Markdown****View as Markdown** # Create DNS Firewall Cluster dns\_firewall.create(DNSFirewallCreateParams\*\*kwargs) -> [DNSFirewallCreateResponse]() POST/accounts/{account\_id}/dns\_firewall Create a DNS Firewall cluster ##### Security
API Token The preferred authorization scheme for interacting with the Cloudflare API. Create a token. **Example:**Authorization: Bearer Sn3lZJTBX6kkg7OdcBUAxOO963GEIyGQqnFTOFYY
API Email + API Key The previous authorization scheme for interacting with the Cloudflare API, used in conjunction with a Global API key. **Example:**X-Auth-Email: user@example.com The previous authorization scheme for interacting with the Cloudflare API. When possible, use API tokens instead of Global API keys. **Example:**X-Auth-Key: 144c9defac04969c7bfad8efaa8ea194
##### Accepted Permissions (at least one required) `DNS Firewall Write` ##### ParametersExpand Collapse account\_id: str Identifier. maxLength32 [Link to this property](<#(resource)%20dns_firewall%20%3E%20(method)%20create%20%3E%20(params)%20default%20%3E%20(param)%20account_id%20%3E%20(schema)>) name: str DNS Firewall cluster name maxLength160 minLength1 [Link to this property](<#(resource)%20dns_firewall%20%3E%20(method)%20create%20%3E%20(params)%20default%20%3E%20(param)%20name%20%3E%20(schema)>) upstream\_ips: Sequence\[[UpstreamIPs]()] minLength1 [Link to this property](<#(resource)%20dns_firewall%20%3E%20(method)%20create%20%3E%20(params)%20default%20%3E%20(param)%20upstream_ips%20%3E%20(schema)>)
attack\_mitigation: Optional\[AttackMitigationParam] Attack mitigation settings enabled: Optional\[bool] When enabled, automatically mitigate random-prefix attacks to protect upstream DNS servers Link to this property only\_when\_upstream\_unhealthy: Optional\[bool] Only mitigate attacks when upstream servers seem unhealthy Link to this property
[Link to this property](<#(resource)%20dns_firewall%20%3E%20(method)%20create%20%3E%20(params)%20default%20%3E%20(param)%20attack_mitigation%20%3E%20(schema)>) deprecate\_any\_requests: Optional\[[bool]()] Whether to refuse to answer queries for the ANY type [Link to this property](<#(resource)%20dns_firewall%20%3E%20(method)%20create%20%3E%20(params)%20default%20%3E%20(param)%20deprecate_any_requests%20%3E%20(schema)>) dns\_firewall\_ip\_count: Optional\[int] Number of IPv4 addresses to assign to the DNS Firewall cluster. Only used during cluster creation and cannot be changed later. maximum10 minimum1 [Link to this property](<#(resource)%20dns_firewall%20%3E%20(method)%20create%20%3E%20(params)%20default%20%3E%20(param)%20dns_firewall_ip_count%20%3E%20(schema)>) ecs\_fallback: Optional\[[bool]()] Whether to forward client IP (resolver) subnet if no EDNS Client Subnet is sent [Link to this property](<#(resource)%20dns_firewall%20%3E%20(method)%20create%20%3E%20(params)%20default%20%3E%20(param)%20ecs_fallback%20%3E%20(schema)>) maximum\_cache\_ttl: Optional\[float] By default, Cloudflare attempts to cache responses for as long as indicated by the TTL received from upstream nameservers. This setting sets an upper bound on this duration. For caching purposes, higher TTLs will be decreased to the maximum value defined by this setting. This setting does not affect the TTL value in the DNS response Cloudflare returns to clients. Cloudflare will always forward the TTL value received from upstream nameservers. maximum36000 minimum30 [Link to this property](<#(resource)%20dns_firewall%20%3E%20(method)%20create%20%3E%20(params)%20default%20%3E%20(param)%20maximum_cache_ttl%20%3E%20(schema)>) minimum\_cache\_ttl: Optional\[float] By default, Cloudflare attempts to cache responses for as long as indicated by the TTL received from upstream nameservers. This setting sets a lower bound on this duration. For caching purposes, lower TTLs will be increased to the minimum value defined by this setting. This setting does not affect the TTL value in the DNS response Cloudflare returns to clients. Cloudflare will always forward the TTL value received from upstream nameservers. Note that, even with this setting, there is no guarantee that a response will be cached for at least the specified duration. Cached responses may be removed earlier for capacity or other operational reasons. maximum36000 minimum30 [Link to this property](<#(resource)%20dns_firewall%20%3E%20(method)%20create%20%3E%20(params)%20default%20%3E%20(param)%20minimum_cache_ttl%20%3E%20(schema)>) negative\_cache\_ttl: Optional\[float] This setting controls how long DNS Firewall should cache negative responses (e.g., NXDOMAIN) from the upstream servers. This setting does not affect the TTL value in the DNS response Cloudflare returns to clients. Cloudflare will always forward the TTL value received from upstream nameservers. maximum36000 minimum30 [Link to this property](<#(resource)%20dns_firewall%20%3E%20(method)%20create%20%3E%20(params)%20default%20%3E%20(param)%20negative_cache_ttl%20%3E%20(schema)>) ratelimit: Optional\[float] Maximum number of DNS queries per second that will be forwarded to your upstream nameservers. The limit is enforced per server, where each server receives a fraction of the configured value. The actual aggregate rate for a data center may vary depending on how many servers are present. Responses served from cache do not count toward this limit. Set to null to disable rate limiting. maximum1000000000 minimum100 [Link to this property](<#(resource)%20dns_firewall%20%3E%20(method)%20create%20%3E%20(params)%20default%20%3E%20(param)%20ratelimit%20%3E%20(schema)>) retries: Optional\[float] Number of retries for fetching DNS responses from upstream nameservers (not counting the initial attempt) maximum2 minimum0 [Link to this property](<#(resource)%20dns_firewall%20%3E%20(method)%20create%20%3E%20(params)%20default%20%3E%20(param)%20retries%20%3E%20(schema)>) ##### ReturnsExpand Collapse
class DNSFirewallCreateResponse: … id: str Identifier. maxLength32 Link to this property deprecate\_any\_requests: bool Whether to refuse to answer queries for the ANY type Link to this property dns\_firewall\_ips: List\[FirewallIPs] Link to this property ecs\_fallback: bool Whether to forward client IP (resolver) subnet if no EDNS Client Subnet is sent Link to this property maximum\_cache\_ttl: float By default, Cloudflare attempts to cache responses for as long as indicated by the TTL received from upstream nameservers. This setting sets an upper bound on this duration. For caching purposes, higher TTLs will be decreased to the maximum value defined by this setting. This setting does not affect the TTL value in the DNS response Cloudflare returns to clients. Cloudflare will always forward the TTL value received from upstream nameservers. maximum36000 minimum30 Link to this property minimum\_cache\_ttl: float By default, Cloudflare attempts to cache responses for as long as indicated by the TTL received from upstream nameservers. This setting sets a lower bound on this duration. For caching purposes, lower TTLs will be increased to the minimum value defined by this setting. This setting does not affect the TTL value in the DNS response Cloudflare returns to clients. Cloudflare will always forward the TTL value received from upstream nameservers. Note that, even with this setting, there is no guarantee that a response will be cached for at least the specified duration. Cached responses may be removed earlier for capacity or other operational reasons. maximum36000 minimum30 Link to this property modified\_on: datetime Last modification of DNS Firewall cluster formatdate-time Link to this property name: str DNS Firewall cluster name maxLength160 minLength1 Link to this property negative\_cache\_ttl: Optional\[float] This setting controls how long DNS Firewall should cache negative responses (e.g., NXDOMAIN) from the upstream servers. This setting does not affect the TTL value in the DNS response Cloudflare returns to clients. Cloudflare will always forward the TTL value received from upstream nameservers. maximum36000 minimum30 Link to this property ratelimit: Optional\[float] Maximum number of DNS queries per second that will be forwarded to your upstream nameservers. The limit is enforced per server, where each server receives a fraction of the configured value. The actual aggregate rate for a data center may vary depending on how many servers are present. Responses served from cache do not count toward this limit. Set to null to disable rate limiting. maximum1000000000 minimum100 Link to this property retries: float Number of retries for fetching DNS responses from upstream nameservers (not counting the initial attempt) maximum2 minimum0 Link to this property upstream\_ips: List\[UpstreamIPs] minLength1 Link to this property
attack\_mitigation: Optional\[AttackMitigation] Attack mitigation settings enabled: Optional\[bool] When enabled, automatically mitigate random-prefix attacks to protect upstream DNS servers Link to this property only\_when\_upstream\_unhealthy: Optional\[bool] Only mitigate attacks when upstream servers seem unhealthy Link to this property
Link to this property
[Link to this property](<#(resource)%20dns_firewall%20%3E%20(model)%20dns_firewall_create_response%20%3E%20(schema)>) ### Create DNS Firewall Cluster Python HTTPTypeScriptPythonGoTerraform ``` import os from cloudflare import Cloudflare client = Cloudflare( api_token=os.environ.get("CLOUDFLARE_API_TOKEN"), # This is the default and can be omitted ) dns_firewall = client.dns_firewall.create( account_id="023e105f4ecef8ad9ca31a8372d0c353", name="My Awesome DNS Firewall cluster", upstream_ips=["192.0.2.1", "198.51.100.1", "2001:DB8:100::CF"], ) print(dns_firewall.id) ``` 200 example ``` { "errors": [ { "code": 1000, "message": "message", "documentation_url": "documentation_url", "source": { "pointer": "pointer" } } ], "messages": [ { "code": 1000, "message": "message", "documentation_url": "documentation_url", "source": { "pointer": "pointer" } } ], "success": true, "result": { "id": "023e105f4ecef8ad9ca31a8372d0c353", "deprecate_any_requests": true, "dns_firewall_ips": [ "203.0.113.1", "203.0.113.254", "2001:DB8:AB::CF", "2001:DB8:CD::CF" ], "ecs_fallback": false, "maximum_cache_ttl": 900, "minimum_cache_ttl": 60, "modified_on": "2014-01-01T05:20:00.12345Z", "name": "My Awesome DNS Firewall cluster", "negative_cache_ttl": 900, "ratelimit": 600, "retries": 2, "upstream_ips": [ "192.0.2.1", "198.51.100.1", "2001:DB8:100::CF" ], "attack_mitigation": { "enabled": true, "only_when_upstream_unhealthy": false } } } ``` ##### Returns Examples 200 example ``` { "errors": [ { "code": 1000, "message": "message", "documentation_url": "documentation_url", "source": { "pointer": "pointer" } } ], "messages": [ { "code": 1000, "message": "message", "documentation_url": "documentation_url", "source": { "pointer": "pointer" } } ], "success": true, "result": { "id": "023e105f4ecef8ad9ca31a8372d0c353", "deprecate_any_requests": true, "dns_firewall_ips": [ "203.0.113.1", "203.0.113.254", "2001:DB8:AB::CF", "2001:DB8:CD::CF" ], "ecs_fallback": false, "maximum_cache_ttl": 900, "minimum_cache_ttl": 60, "modified_on": "2014-01-01T05:20:00.12345Z", "name": "My Awesome DNS Firewall cluster", "negative_cache_ttl": 900, "ratelimit": 600, "retries": 2, "upstream_ips": [ "192.0.2.1", "198.51.100.1", "2001:DB8:100::CF" ], "attack_mitigation": { "enabled": true, "only_when_upstream_unhealthy": false } } } ```