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Oracle Cloud Infrastructure (OCI) Network Security Module for Terraform

Introduction

This module gives an interface to managing security policies in OCI using the following resources:

  • Security Lists.

Solution

This serves as a foundational component in an OCI environment, providing the ability to configure network security policies within OCI.

This module provides the ability to create and manage the following:

Resource Created by Default?
Security List(s) No
Network Security Group(s) No
Network Security Group Rule(s) No

Prerequisites

This module does not create any dependencies or prerequisites (these must be created prior to using this module):

  • VCN

Getting Started

This is a core service module that is foundational to many other resources in OCI, so there is really nothing to directly access.

Several fully-functional examples have been provided in the examples directory. For a quick-start guide, at minimum, you need the following (for the most basic deployment):

module "oci_security_policies" {
  ...<SNIP - for brevity>...
    
  default_compartment_id  = var.default_compartment_id
  vcn_id                  = oci_core_vcn.this.id
  
  security_lists = {}
  nsgs = {}
}

The above example won't actually deploy any subnets (because the security_lists and nsgs attributes are an empty map), however if you populate this map with entries (keys = name, values = subnet attributes), Security Lists and/or NSGs would be deployed.

Accessing the Solution

This core service module is typically used at deployment, with no further access required.

Module inputs

Attribute Data Type Required Default Value Valid Values Description
default_compartment_id string yes none string of the compartment OCID This is the default OCID that will be used when creating objects (unless overridden for any specific object). This needs to be the OCID of a pre-existing compartment (it will not create the compartment.
vcn_id string yes N/A (no default) The OCID of the VCN where the Security List(s) should be created.
default_defined_tags map(string) no {} A map of tag names and values. If there are any Defined Tags that you'd like assigned by default to all resources (unless otherwise overridden at the resource), set these here.
default_freeform_tags map(string) no {} A map of tag names and values. If there are any Freeform Tags that you'd like assigned by default to all resources (unless otherwise overridden at the resource), set these here.
security_lists map no see below see below The parameters used to define and customize the Security List(s).
nsgs map no see below see below The parameters used to define and customize the Network Security Group(s) (NSGs).
standalone_nsg_rules map no see below see below The parameters used to define and customize any Network Security Group(s) (NSGs) that might belong to NSGs that are not managed by this module.

security_lists

The security_lists attribute is an optional map object attribute. Note that if this attribute is used, all keys/values must be specified (Terraform does not allow for default or optional map keys/values).

Each entry's key specifies the name to be given to the Security List, with its attributes specified as values in a sub-map.

Each entry has the following defined keys (and default values):

Key Data Type Default Value Valid Values Description
compartment_id string default_compartment_id Compartment OCID Pre-existing compartment OCID (if default compartment is not to be used). If this value is null, the default compartment OCID will be used.
defined_tags map(string) no var.default_defined_tags A map of tag names and values.
freeform_tags map(string) no var.default_freeform_tags A map of tag names and values.
ingress_rules list of maps [] See definition below Specify the ingress_rules to be used (zero or more).
egress_rules list of maps [] See definition below Specify the egress_rules to be used (zero or more).

ingress_rules:

Key Data Type Default Value Valid Values Description
stateless bool none true/false Whether or not the rule should be stateless (true) or stateful (false).
protocol string none "all" or valid IP protocol number The IP protocol number (or "all" for all protocols) to be used for this rule.
src string none CIDR The IPv4 CIDR to be used for the rule.
src_type string none CIDR_BLOCK, SERVICE_CIDR_BLOCK The type of CIDR block that is specified.
src_port map: {min, max} none The range of source ports to use for the rule.
dst_port map: {min, max} none The range of destination ports to use for the rule.
icmp_type number none If ICMP is used as the protocol (protocol = 1), this can be used to narrow the specific ICMP type.
icmp_code number none If ICMP is used as the protocol (protocol = 1), this can be used to narrow the specific ICMP code.

egress_rules:

Key Data Type Default Value Valid Values Description
stateless bool none true/false Whether or not the rule should be stateless (true) or stateful (false).
protocol string none "all" or valid IP protocol number The IP protocol number (or "all" for all protocols) to be used for this rule.
dst string none CIDR The IPv4 CIDR to be used for the rule.
dst_type string none CIDR_BLOCK, SERVICE_CIDR_BLOCK The type of CIDR block that is specified.
src_port map: {min, max} none The range of source ports to use for the rule.
dst_port map: {min, max} none The range of destination ports to use for the rule.
icmp_type number none If ICMP is used as the protocol (protocol = 1), this can be used to narrow the specific ICMP type.
icmp_code number none If ICMP is used as the protocol (protocol = 1), this can be used to narrow the specific ICMP code.

Example

module "oci_security_policy" {
  ... /snip - shortened for brevity...

  security_lists = {
    vcn = {
      compartment_id    = null
      defined_tags      = null
      freeform_tags     = null
      ingress_rules     = null
      egress_rules      = [
        {
          stateless     = true
          protocol      = "6"
          dst           = "10.0.0.0/24"
          dst_type      = "CIDR_BLOCK"
          src_port      = {
            min         = 22
            max         = 22
          }
          dst_port      = null
          icmp_type     = null
          icmp_code     = null
        },
        {
          stateless     = true
          protocol      = "6"
          dst           = "10.0.0.16/28"
          dst_type      = "CIDR_BLOCK"
          src_port      = null
          dst_port      = {
            min         = 80
            max         = 80
          }
          icmp_type     = null
          icmp_code     = null
        },
        {
          stateless     = true
          protocol      = "6"
          dst           = "10.0.0.32/28"
          dst_type      = "CIDR_BLOCK"
          src_port      = {
            min         = 55000
            max         = 65535
          }
          dst_port      = {
            min         = 80
            max         = 80
          }
          icmp_type     = null
          icmp_code     = null
        }
      ]
    }
  }
}

The above example will create a single Security List, called vcn, using the default compartment OCID (not shown in the above example), having three egress rules.

nsgs

The nsgs attribute is an optional map object attribute. Note that if this attribute is used, all keys/values must be specified (Terraform does not allow for default or optional map keys/values).

Each entry's key specifies the name to be given to the Network Security Group (NSG), with its attributes specified as values in a sub-map.

Each entry has the following defined keys (and default values):

Key Data Type Default Value Valid Values Description
compartment_id string default_compartment_id Compartment OCID Pre-existing compartment OCID (if default compartment is not to be used). If this value is null, the default compartment OCID will be used.
defined_tags map(string) no var.default_defined_tags A map of tag names and values.
freeform_tags map(string) no var.default_freeform_tags A map of tag names and values.
ingress_rules list of maps [] See definition below Specify the ingress_rules to be used (zero or more).
egress_rules list of maps [] See definition below Specify the egress_rules to be used (zero or more).

ingress_rules:

Key Data Type Default Value Valid Values Description
description string none Any valid string accepted by the OCI API. This is an optional parameter, which allows for a description to be set for the rule.
stateless bool none true/false Whether or not the rule should be stateless (true) or stateful (false).
protocol string none "all" or valid IP protocol number The IP protocol number (or "all" for all protocols) to be used for this rule.
src string none CIDR The IPv4 CIDR to be used for the rule.
src_type string none CIDR_BLOCK, SERVICE_CIDR_BLOCK, NETWORK_SECURITY_GROUP, NSG_NAME The type of source that is to be used. Note that if NSG_NAME is used, an NSG name is to be given in the src attribute, with the module looking up the value of the pre-existing NSG (getting the OCID from the NSG name given) and the actual type given to the OCI API will be NETWORK_SECURITY_GROUP. NSG_NAME is essentially a shortcut, that allows for the name of an NSG (instead of its OCID, as is normally required when using the NETWORK_SECURITY_GROUP type).
src_port map: {min, max} none The range of source ports to use for the rule.
dst_port map: {min, max} none The range of destination ports to use for the rule.
icmp_type number none If ICMP is used as the protocol (protocol = 1), this can be used to narrow the specific ICMP type.
icmp_code number none If ICMP is used as the protocol (protocol = 1), this can be used to narrow the specific ICMP code.

egress_rules:

Key Data Type Default Value Valid Values Description
description string none Any valid string accepted by the OCI API. This is an optional parameter, which allows for a description to be set for the rule.
stateless bool none true/false Whether or not the rule should be stateless (true) or stateful (false).
protocol string none "all" or valid IP protocol number The IP protocol number (or "all" for all protocols) to be used for this rule.
dst string none CIDR The IPv4 CIDR to be used for the rule.
dst_type string none CIDR_BLOCK, SERVICE_CIDR_BLOCK, NETWORK_SECURITY_GROUP, NSG_NAME The type of source that is to be used. Note that if NSG_NAME is used, an NSG name is to be given in the dst attribute, with the module looking up the value of the pre-existing NSG (getting the OCID from the NSG name given) and the actual type given to the OCI API will be NETWORK_SECURITY_GROUP. NSG_NAME is essentially a shortcut, that allows for the name of an NSG (instead of its OCID, as is normally required when using the NETWORK_SECURITY_GROUP type).
src_port map: {min, max} none The range of source ports to use for the rule.
dst_port map: {min, max} none The range of destination ports to use for the rule.
icmp_type number none If ICMP is used as the protocol (protocol = 1), this can be used to narrow the specific ICMP type.
icmp_code number none If ICMP is used as the protocol (protocol = 1), this can be used to narrow the specific ICMP code.

Example

module "oci_security_policies" {
  ... /snip - shortened for brevity...

  nsgs                  = {
    db                  = {
      compartment_id    = null
      defined_tags      = null
      freeform_tags     = null
      ingress_rules     = [
        {
          description   = "this is a test!"
          stateless     = false
          protocol      = "6"
          src           = "10.1.2.3/32"
          src_type      = "CIDR_BLOCK"
          src_port      = {
            min = "80"
            max = "80"
          }
          dst_port      = {
            min = "80"
            max = "80"
          }
          icmp_code     = null
          icmp_type     = null
        }
      ]
      egress_rules        = [
        {
          description   = "this is a test!"
          stateless     = true
          protocol      = "17"
          dst           = "10.1.2.3/32"
          dst_type      = "CIDR_BLOCK"
          src_port      = {
            min = "123"
            max = "123"
          }
          dst_port      = {
            min = "53"
            max = "53"
          }
          icmp_code     = null
          icmp_type     = null
        }
      ]
    }
  }
}

The above example will create a NSG with a name of db, having one ingress rule and one egress rule, using the default compartment OCID (not shown in the above example).

standalone_nsg_rules

The standalone_nsg_rules attribute is an optional map attribute used to manage NSGs rules for NSGs that are not created and managed by this module. A primary use-case is when one or more NSG rules need to be added to an NSG that's defined outside of the scope of this module. Note that if this attribute is used, all keys/values must be specified (Terraform does not allow for default or optional map keys/values).

Ingress and egress NSG rules may be managed, with its attributes specified as values in a sub-map.

The standalone_nsg_rules attribute has the following defined keys (and default values):

Key Data Type Default Value Valid Values Description
ingress_rules list of maps [] See definition below Specify the ingress_rules to be used (zero or more).
egress_rules list of maps [] See definition below Specify the egress_rules to be used (zero or more).

ingress_rules:

Key Data Type Default Value Valid Values Description
nsg_id string none The OCID of a pre-existing NSG Any valid NSG OCID.
description string none Any valid string accepted by the OCI API. This is an optional parameter, which allows for a description to be set for the rule.
stateless bool none true/false Whether or not the rule should be stateless (true) or stateful (false).
protocol string none "all" or valid IP protocol number The IP protocol number (or "all" for all protocols) to be used for this rule.
src string none CIDR The IPv4 CIDR to be used for the rule.
src_type string none CIDR_BLOCK, SERVICE_CIDR_BLOCK, NETWORK_SECURITY_GROUP, NSG_NAME The type of source that is to be used. Note that if NSG_NAME is used, an NSG name is to be given in the src attribute, with the module looking up the value of the pre-existing NSG (getting the OCID from the NSG name given) and the actual type given to the OCI API will be NETWORK_SECURITY_GROUP. NSG_NAME is essentially a shortcut, that allows for the name of an NSG (instead of its OCID, as is normally required when using the NETWORK_SECURITY_GROUP type).
src_port map: {min, max} none The range of source ports to use for the rule.
dst_port map: {min, max} none The range of destination ports to use for the rule.
icmp_type number none If ICMP is used as the protocol (protocol = 1), this can be used to narrow the specific ICMP type.
icmp_code number none If ICMP is used as the protocol (protocol = 1), this can be used to narrow the specific ICMP code.

egress_rules:

Key Data Type Default Value Valid Values Description
nsg_id string none The OCID of a pre-existing NSG Any valid NSG OCID.
description string none Any valid string accepted by the OCI API. This is an optional parameter, which allows for a description to be set for the rule.
stateless bool none true/false Whether or not the rule should be stateless (true) or stateful (false).
protocol string none "all" or valid IP protocol number The IP protocol number (or "all" for all protocols) to be used for this rule.
dst string none CIDR The IPv4 CIDR to be used for the rule.
dst_type string none CIDR_BLOCK, SERVICE_CIDR_BLOCK, NETWORK_SECURITY_GROUP, NSG_NAME The type of source that is to be used. Note that if NSG_NAME is used, an NSG name is to be given in the dst attribute, with the module looking up the value of the pre-existing NSG (getting the OCID from the NSG name given) and the actual type given to the OCI API will be NETWORK_SECURITY_GROUP. NSG_NAME is essentially a shortcut, that allows for the name of an NSG (instead of its OCID, as is normally required when using the NETWORK_SECURITY_GROUP type).
src_port map: {min, max} none The range of source ports to use for the rule.
dst_port map: {min, max} none The range of destination ports to use for the rule.
icmp_type number none If ICMP is used as the protocol (protocol = 1), this can be used to narrow the specific ICMP type.
icmp_code number none If ICMP is used as the protocol (protocol = 1), this can be used to narrow the specific ICMP code.

Example

module "oci_security_policies" {
  ... /snip - shortened for brevity...

  nsgs                  = {
    db                  = {
      compartment_id    = null
      defined_tags      = null
      freeform_tags     = null
      ingress_rules     = [
        {
          description   = "this is a test!"
          stateless     = false
          protocol      = "6"
          src           = "10.1.2.3/32"
          src_type      = "CIDR_BLOCK"
          src_port      = {
            min = "80"
            max = "80"
          }
          dst_port      = {
            min = "80"
            max = "80"
          }
          icmp_code     = null
          icmp_type     = null
        }
      ]
      egress_rules        = [
        {
          description   = "this is a test!"
          stateless     = true
          protocol      = "17"
          dst           = "10.1.2.3/32"
          dst_type      = "CIDR_BLOCK"
          src_port      = {
            min = "123"
            max = "123"
          }
          dst_port      = {
            min = "53"
            max = "53"
          }
          icmp_code     = null
          icmp_type     = null
        }
      ]
    }
  }
}

The above example will create a NSG with a name of db, having one ingress rule and one egress rule, using the default compartment OCID (not shown in the above example).

Outputs

A map containing each subnet is returned in the security_lists output. The outer map key is the name of the subnet, with all subnet attributes (as a map) being returned as the value.

A map of all NSGs is returned in the nsgs output.

A compilation of all NSG rules are returned in the nsg_rules output as a list, while the nsg_ingress_rules output provides only the ingress NSG rules (as a list) and the nsg_egress_rules provides only the egress NSG rules (also as a list).

Notes/Issues

  • Note that if you provide any single element in the different resource maps (security_lists, nsgs, etc), you must provide all of them. Maps do not have a notion of an optional (or default value) for keys within the map, requiring that all keys/values be passed (if one key is passed, all keys must be passed).

Release Notes

See [./docs/release_notes.md](release notes) for release notes information.

URLs

  • Nothing at this time

Contributing

This project is open source. Oracle appreciates any contributions that are made by the open source community.

License

Copyright (c) 2020 Oracle and/or its affiliates.

Licensed under the Universal Permissive License v 1.0 as shown at https://oss.oracle.com/licenses/upl.

See LICENSE for more details.

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(OCI) Oracle Cloud Infrastructure module to manage security policies

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