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Azure Database SQL Server Firewall Rule

This page shows how to write Terraform and Azure Resource Manager for Database SQL Server Firewall Rule and write them securely.

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azurerm_mssql_firewall_rule (Terraform)

The SQL Server Firewall Rule in Database can be configured in Terraform with the resource name azurerm_mssql_firewall_rule. The following sections describe 9 examples of how to use the resource and its parameters.

Example Usage from GitHub

Security.tf#L1
resource "azurerm_mssql_firewall_rule" "fwrule-primary" {
    for_each         = local.FirewallRules

    name             = each.key
    server_id        = azurerm_mssql_server.azsqlserver-primary.id
    start_ip_address = each.value.start_ip
firewall_rules.tf#L2
resource "azurerm_mssql_firewall_rule" "example" {
  name             = "Eli Home"
  server_id        = azurerm_mssql_server.db.id
  start_ip_address = "99.3.71.225"
  end_ip_address   = "99.3.71.225"
main.tf#L8
resource "azurerm_mssql_firewall_rule" "example" {
  name             = "FirewallRule1"
  server_id        = var.mssql_server
  start_ip_address = var.starip
  end_ip_address   = var.endip
}
main.tf#L23
resource "azurerm_mssql_firewall_rule" "AllowAzureIps" {
  name             = "AllowAzureIps"
  server_id        = azurerm_mssql_server.server.id
  start_ip_address = "0.0.0.0"
  end_ip_address   = "0.0.0.0"
}
main.tf#L12
resource "azurerm_mssql_firewall_rule" "sql_firewall" {
  count = var.allow_azure_ip_access ? 1 : 0

  name                = "AllowAccessToAzure"
  resource_group_name = var.resource_group_name
  server_name         = azurerm_mssql_server.this.name
main.tf#L14
resource "azurerm_mssql_firewall_rule" "example" {
  name                = "FirewallRule1"
  server_id           = azurerm_mssql_server.server.id
  start_ip_address    = var.server_fw_start_ip
  end_ip_address      = var.server_fw_end_ip
}
tf_resources.tf#L95
resource "azurerm_mssql_firewall_rule" "coviddemo" {
  name                = "AKS-SQL-Rule"
  server_id           = azurerm_mssql_server.coviddemo.id
  start_ip_address    = data.azurerm_public_ip.coviddemo.ip_address
  end_ip_address      = data.azurerm_public_ip.coviddemo.ip_address
}
main.tf#L34
resource "azurerm_mssql_firewall_rule" "ms" {
  name             = "sql-server-firewall-rule"
  server_id        = azurerm_mssql_server.statistics_db_server.id
  start_ip_address = "0.0.0.0"
  end_ip_address   = "0.0.0.0"
}
db-serverless.tf#L87
resource "azurerm_mssql_firewall_rule" "public_ip_be" {
  name                = "BEVM"
  server_id           = azurerm_mssql_server.sqlserver.id
  start_ip_address    = var.backend_vm_ip
  end_ip_address      = var.backend_vm_ip
}

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Parameters

>> from Terraform Registry

Explanation in Terraform Registry

Allows you to manage an Azure SQL Firewall Rule.

>> from Terraform Registry

Tips: Best Practices for The Other Azure Database Resources

In addition to the azurerm_mariadb_firewall_rule, Azure Database has the other resources that should be configured for security reasons. Please check some examples of those resources and precautions.

risk-label

azurerm_mariadb_firewall_rule

Ensure database firewalls do not permit public access

It is better to restrict IP address ranges that can access the database by firewall rules. If both start_ip_address and end_ip_address are set to 0.0.0.0, it blocks connections from the Internet and accepts connections from all Azure datacenter IP addresses.

risk-label

azurerm_mariadb_server

Ensure that access to Azure SQL Database is restricted

It is better to disable public access to the database to avoid unwilling communications with unknown services if not required.

risk-label

azurerm_mssql_database_extended_auditing_policy

Ensure to configure retention periods of database auditing to enough duration

It is better to configure retention periods of database auditing to enough duration. It would be better to set greater than at least 90 days.

risk-label

azurerm_mssql_server

Ensure to enable auditing on Azure SQL databases

It is better to enable auditing on Azure SQL databases. It helps you maintain regulatory compliance, monitor the activities indicating unexpected incidents or suspected security violations.

risk-label

azurerm_mssql_server_security_alert_policy

Ensure to configure at least one email address for threat alerts

It is better to configure at least one email address for threat alerts. SQL Server is able to send alerts for threat detection via emails and it could support us to notice the incident on time.

risk-label

azurerm_mysql_firewall_rule

Ensure database firewalls do not permit public access

It is better to restrict IP address ranges that can access the database by firewall rules. If both start_ip_address and end_ip_address are set to 0.0.0.0, it blocks connections from the Internet and accepts connections from all Azure datacenter IP addresses.

risk-label

azurerm_mysql_server

Ensure to disable public access to database

It is better to disable public access to the database to avoid unwilling communications with unknown services if not required.

risk-label

azurerm_postgresql_firewall_rule

Ensure database firewalls do not permit public access

It is better to restrict IP address ranges that can access the database by firewall rules. If both start_ip_address and end_ip_address are set to 0.0.0.0, it blocks connections from the Internet and accepts connections from all Azure datacenter IP addresses.

risk-label

azurerm_postgresql_server

Ensure to disable public access to database

It is better to disable public access to the database to avoid unwilling communications with unknown services if not required.

risk-label

azurerm_sql_firewall_rule

Ensure database firewalls do not permit public access

It is better to restrict IP address ranges that can access the database by firewall rules. If both start_ip_address and end_ip_address are set to 0.0.0.0, it blocks connections from the Internet and accepts connections from all Azure datacenter IP addresses.

risk-label

azurerm_sql_server

Ensure to enable auditing on Azure SQL databases

It is better to enable auditing on Azure SQL databases. It helps you maintain regulatory compliance, monitor the activities indicating unexpected incidents or suspected security violations.

Review your Azure Database settings

In addition to the above, there are other security points you should be aware of making sure that your .tf files are protected in Shisho Cloud.

Microsoft.Sql/servers/firewallRules (Azure Resource Manager)

The servers/firewallRules in Microsoft.Sql can be configured in Azure Resource Manager with the resource name Microsoft.Sql/servers/firewallRules. The following sections describe how to use the resource and its parameters.

Example Usage from GitHub

Resources.SQL.json#L32
                "Type": "Microsoft.Sql/servers/firewallRules",
                "ResourceType": "Microsoft.Sql/servers/firewallRules",
                "SubscriptionId": "00000000-0000-0000-0000-000000000000"
            },
            {
                "ResourceId": "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/test-rg/providers/Microsoft.Sql/servers/server-A/securityAlertPolicies/Default",
db-server-template.json#L140
            "type": "Microsoft.Sql/servers/firewallRules",
            "apiVersion": "2020-08-01-preview",
            "name": "[concat(parameters('serverName'), '/ClientIPAddress_2020-12-29_05:08:24')]",
            "dependsOn": [
                "[resourceId('Microsoft.Sql/servers', parameters('serverName'))]"
            ],
azuredeployDB.json#L51
      "type": "Microsoft.Sql/servers/firewallRules",
      "apiVersion": "2021-02-01-preview",
      "name": "[concat(parameters('servers_ssnzdbserver_name'), '/150SouthPoint')]",
      "dependsOn": [
        "[resourceId('Microsoft.Sql/servers', parameters('servers_ssnzdbserver_name'))]"
      ],
FirewallRuleList.json#L15
            "type": "Microsoft.Sql/servers/firewallRules",
            "location": "Japan East",
            "kind": "v12.0",
            "properties": {
              "startIpAddress": "0.0.0.0",
              "endIpAddress": "0.0.0.0"
FirewallRuleList.json#L15
            "type": "Microsoft.Sql/servers/firewallRules",
            "properties": {
              "startIpAddress": "0.0.0.0",
              "endIpAddress": "0.0.0.0"
            }
          },
FirewallRuleList.json#L15
            "type": "Microsoft.Sql/servers/firewallRules",
            "location": "Japan East",
            "kind": "v12.0",
            "properties": {
              "startIpAddress": "0.0.0.0",
              "endIpAddress": "0.0.0.0"
FirewallRuleList.json#L15
            "type": "Microsoft.Sql/servers/firewallRules",
            "properties": {
              "startIpAddress": "0.0.0.0",
              "endIpAddress": "0.0.0.0"
            }
          },
FirewallRuleList.json#L15
            "type": "Microsoft.Sql/servers/firewallRules",
            "properties": {
              "startIpAddress": "0.0.0.0",
              "endIpAddress": "0.0.0.0"
            }
          },
FirewallRuleList.json#L15
            "type": "Microsoft.Sql/servers/firewallRules",
            "location": "Japan East",
            "kind": "v12.0",
            "properties": {
              "startIpAddress": "0.0.0.0",
              "endIpAddress": "0.0.0.0"
FirewallRuleList.json#L15
            "type": "Microsoft.Sql/servers/firewallRules",
            "location": "Japan East",
            "kind": "v12.0",
            "properties": {
              "startIpAddress": "0.0.0.0",
              "endIpAddress": "0.0.0.0"

Parameters

  • apiVersion required - string
  • name required - string

    The name of the firewall rule.

  • properties required
      • endIpAddress required - string

        The end IP address of the firewall rule. Must be IPv4 format. Must be greater than or equal to startIpAddress. Use value '0.0.0.0' to represent all Azure-internal IP addresses.

      • startIpAddress required - string

        The start IP address of the firewall rule. Must be IPv4 format. Use value '0.0.0.0' to represent all Azure-internal IP addresses.

  • type required - string

>> from Azure Resource Manager Documentation

The Other Related Azure Database Resources

Frequently asked questions

What is Azure Database SQL Server Firewall Rule?

Azure Database SQL Server Firewall Rule is a resource for Database of Microsoft Azure. Settings can be wrote in Terraform.

Where can I find the example code for the Azure Database SQL Server Firewall Rule?

For Terraform, the Indunil-Dayaratne/code-samples123, tarwn/example-lob-app and moffzilla/tmm-pso source code examples are useful. See the Terraform Example section for further details.

For Azure Resource Manager, the Azure/PSRule.Rules.Azure, Radical-Dave/Auto and SamSmithNZ-dotcom/SamSmithNZ.com source code examples are useful. See the Azure Resource Manager Example section for further details.

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