--- title: Create DNS Firewall Cluster --- [Skip to content](#_top) [API Reference](https://developers.cloudflare.com/api/go) [DNS Firewall](https://developers.cloudflare.com/api/go/resources/dns_firewall) Copy Markdown Open in **Claude**Open in **ChatGPT**Open in **Cursor** --- **Copy Markdown****View as Markdown** # Create DNS Firewall Cluster client.DNSFirewall.New(ctx, params) (\*[DNSFirewallNewResponse](), error) 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
params DNSFirewallNewParams AccountID param.Field\[string] Path param: Identifier. maxLength32 Link to this property Name param.Field\[string] Body param: DNS Firewall cluster name maxLength160 minLength1 Link to this property UpstreamIPs param.Field\[\[]UpstreamIPs] Body param minLength1 Link to this property AttackMitigation param.Field\[AttackMitigation]Optional Body param: Attack mitigation settings Link to this property DeprecateAnyRequests param.Field\[bool]Optional Body param: Whether to refuse to answer queries for the ANY type Link to this property DNSFirewallIPCount param.Field\[int64]Optional Body param: 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 ECSFallback param.Field\[bool]Optional Body param: Whether to forward client IP (resolver) subnet if no EDNS Client Subnet is sent Link to this property MaximumCacheTTL param.Field\[float64]Optional Body param: 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 MinimumCacheTTL param.Field\[float64]Optional Body param: 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 NegativeCacheTTL param.Field\[float64]Optional Body param: 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 param.Field\[float64]Optional Body param: 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 param.Field\[float64]Optional Body param: Number of retries for fetching DNS responses from upstream nameservers (not counting the initial attempt) maximum2 minimum0 Link to this property
[Link to this property](<#(resource)%20dns_firewall%20%3E%20(method)%20create%20%3E%20(params)%20default>) ##### ReturnsExpand Collapse
type DNSFirewallNewResponse struct{…} ID string Identifier. maxLength32 Link to this property DeprecateAnyRequests bool Whether to refuse to answer queries for the ANY type Link to this property DNSFirewallIPs \[]FirewallIPs Link to this property ECSFallback bool Whether to forward client IP (resolver) subnet if no EDNS Client Subnet is sent Link to this property MaximumCacheTTL float64 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 MinimumCacheTTL float64 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 ModifiedOn Time Last modification of DNS Firewall cluster formatdate-time Link to this property Name string DNS Firewall cluster name maxLength160 minLength1 Link to this property NegativeCacheTTL float64 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 float64 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 float64 Number of retries for fetching DNS responses from upstream nameservers (not counting the initial attempt) maximum2 minimum0 Link to this property UpstreamIPs \[]UpstreamIPs minLength1 Link to this property
AttackMitigation AttackMitigationOptional Attack mitigation settings Enabled boolOptional When enabled, automatically mitigate random-prefix attacks to protect upstream DNS servers Link to this property OnlyWhenUpstreamUnhealthy boolOptional 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)%20DNSFirewallNewResponse%20%3E%20(schema)>) ### Create DNS Firewall Cluster Go HTTPTypeScriptPythonGoTerraform ``` package main import ( "context" "fmt" "github.com/cloudflare/cloudflare-go" "github.com/cloudflare/cloudflare-go/dns_firewall" "github.com/cloudflare/cloudflare-go/option" ) func main() { client := cloudflare.NewClient( option.WithAPIToken("Sn3lZJTBX6kkg7OdcBUAxOO963GEIyGQqnFTOFYY"), ) dnsFirewall, err := client.DNSFirewall.New(context.TODO(), dns_firewall.DNSFirewallNewParams{ AccountID: cloudflare.F("023e105f4ecef8ad9ca31a8372d0c353"), Name: cloudflare.F("My Awesome DNS Firewall cluster"), UpstreamIPs: cloudflare.F([]dns_firewall.UpstreamIPsParam{"192.0.2.1", "198.51.100.1", "2001:DB8:100::CF"}), }) if err != nil { panic(err.Error()) } fmt.Printf("%+v\n", dnsFirewall.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 } } } ```