{
  "client_requirement": "client_is_administrator+",
  "items": [
    {
      "type": "header_page_title",
      "items": [
        {
          "type": "h1",
          "text": "DNS Server"
        },
        {
          "type": "p",
          "text": "Upstream resolvers and forwarding DNS service settings."
        }
      ]
    },
    {
      "type": "card",
      "label": "Upstream DNS",
      "client_requirement": "client_is_administrator+",
      "items": [
        {
          "type": "form",
          "action": "/action/dnsserver/upstreamdns_save",
          "method": "post",
          "items": [
            {
              "type": "editable_list",
              "label": "DNS Providers",
              "name": "upstream_servers",
              "item_placeholder": "e.g. 1.1.1.1",
              "add_label": "Add Provider",
              "validate": "VALIDATION_IPV4_FORMAT|VALIDATION_IPV6_FORMAT",
              "hint": "DNS resolvers queried for external hostnames. Supports IPv4 and IPv6.",
              "items": "%DNS_UPSTREAM_SERVERS_JSON%"
            },
            {
              "type": "field",
              "label": "Strict Order",
              "name": "strict_order",
              "input_type": "checkbox",
              "value": "%DNS_STRICT_ORDER%",
              "hint": "Query DNS providers in list order rather than in parallel."
            },
            {
              "type": "button_row",
              "items": [
                {
                  "type": "button_primary",
                  "action": "/action/dnsserver/upstreamdns_save",
                  "method": "post",
                  "text": "Save"
                },
                {
                  "type": "button_cancel",
                  "text": "Cancel"
                }
              ]
            }
          ]
        }
      ]
    },
    {
      "type": "card",
      "label": "DNS Forwarding",
      "client_requirement": "client_is_administrator+",
      "items": [
        {
          "type": "form",
          "action": "/action/dnsserver/dnsforwarding_save",
          "method": "post",
          "items": [
            {
              "type": "field",
              "label": "Cache Size",
              "name": "cache_size",
              "input_type": "number",
              "value": "%DNS_CACHE_SIZE%",
              "min": 0,
              "hint": "Max DNS responses to cache per instance. Set to 0 to disable caching."
            },
            {
              "type": "button_row",
              "items": [
                {
                  "type": "button_primary",
                  "action": "/action/dnsserver/dnsforwarding_save",
                  "method": "post",
                  "text": "Save"
                },
                {
                  "type": "button_cancel",
                  "text": "Cancel"
                }
              ]
            }
          ]
        }
      ]
    }
  ,
    {
      "type": "card",
      "label": "DNS Statistics",
      "items": [
        {
          "type": "raw_html",
          "html": "%DNS_PERIOD_SELECTOR%"
        },
        {
          "type": "grid",
          "rows": [
            {
              "cells": [
                {"type": "grid_label", "text": "Tracking Since"},
                {"type": "grid_value", "text": "%DNS_METRICS_SINCE%"}
              ]
            },
            {
              "cells": [
                {"type": "grid_label", "text": "Last Updated"},
                {"type": "grid_value", "text": "%DNS_METRICS_UPDATED%"}
              ]
            },
            {
              "cells": [
                {"type": "grid_label", "text": "Total Queries"},
                {"type": "grid_value", "text": "%DNS_STAT_QUERIES%"}
              ]
            },
            {
              "cells": [
                {"type": "grid_label", "text": "Cache Hits"},
                {"type": "grid_value", "text": "%DNS_STAT_HITS% (%DNS_STAT_HIT_RATE% hit rate)"}
              ]
            },
            {
              "cells": [
                {"type": "grid_label", "text": "Forwarded to Upstream"},
                {"type": "grid_value", "text": "%DNS_STAT_FORWARDED%"}
              ]
            },
            {
              "cells": [
                {"type": "grid_label", "text": "Authoritative Answers"},
                {"type": "grid_value", "text": "%DNS_STAT_AUTH%"}
              ]
            },
            {
              "cells": [
                {"type": "grid_label", "text": "TCP Peak"},
                {"type": "grid_value", "text": "%DNS_STAT_TCP_PEAK%"}
              ]
            },
            {
              "cells": [
                {"type": "grid_label", "text": "Cache Capacity"},
                {"type": "grid_value", "text": "%DNS_CACHE_SIZE% entries"}
              ]
            },
            {
              "cells": [
                {"type": "grid_label", "text": "Cache Evictions"},
                {"type": "grid_value", "text": "%DNS_STAT_CACHE_EVICTIONS%"}
              ]
            }
          ]
        },
        {
          "type": "raw_html",
          "html": "%DNS_PROVIDERS_TABLE%"
        }
      ]
    }
  ]
}