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F5 & Azure Secure Cloud Computing Architecture

F5 & Azure Secure Cloud Computing Architecture

Introduction

Moving to the Cloud can be tough. The Department of Defense (DoD) has requirements to protect the Defense Information System Networks (DISN) and DoD Information Networks (DoDIN), even for workloads residing in a Cloud Service Provider (CSP). Per the SCCA Functional Requirements Document, the purpose of SCCA is to provide a barrier of protection between the DISN and commercial cloud services used by the DoD.

“It specifically addresses attacks originating from mission applications that reside within the Cloud Service Environment (CSE) upon both the DISN infrastructure and neighboring tenants in a multi-tenant environment. It provides a consistent CSP independent level of security that enables the use of commercially available Cloud Service Offerings (CSO) for hosting DoD mission applications operating at all DoD Information System Impact Levels (i.e. 2, 4, 5, & 6).” * https://dl.dod.cyber.mil/wp-content/uploads/cloud/pdf/SCCA_FRD_v2-9.pdf

This solution uses Terraform to launch a Single Tiered or Three Tier deployment of three NIC cloud-focused BIG-IP VE cluster(s) (Active/Standby) in Microsoft Azure. This is the standard cloud design where the BIG-IP VE instance is running with three interfaces, where both management and data plane traffic is segregated.

The BIG-IP VEs have the following features / modules enabled:

Local / Global Availability
Firewall
- Firewall with Intrusion Protection and IP Intelligence only available with BYOL deployments today.
Web Application Firewall

Prerequisites

Important: When you configure the admin password for the BIG-IP VE in the template, you cannot use the character #. Additionally, there are a number of other special characters that you should avoid using for F5 product user accounts. See K2873 for details.
This template requires a service principal, one will be created in the provided script at ./prepare/setupAzureGovVars_local.sh.
- Important For gov cloud deployments its important to run this script to prepare your environment, whether local or Azure Cloud CLI based. There are extra env variables that ned to be passed by TF to Gov Cloud Regions.
This deployment will be using the Terraform Azurerm provider to build out all the neccessary Azure objects. Therefore, Azure CLI is required. for installation, please follow this Microsoft link
If this is the first time to deploy the F5 image, the subscription used in this deployment needs to be enabled to programatically deploy. For more information, please refer to Configure Programatic Deployment
You need to set your region and log in to azure ahead of time, the scripts will map your authenitcation credentials and create a service principle, so you will not need to hardcode any credentials in the files.

Important configuration notes

All variables are configured in variables.tf
MOST STIG / SRG configurations settings have been addressed in the Declarative Onboarding and Application Services templates used in this example.
An Example application is optionally deployed with this template. The example appliation includes several apps running in docker on the host:
- Juiceshop on port 3000
- F5 Demo app by Eric Chen on ports 80 and 443
- rsyslogd with PimpMyLogs on port 808
- Note Juiceshop and PimpMyLogs URLS are part of the terraform output when deployed.
All Configuration should happen at the root level; auto.tfvars or variables.tf.

PAYG versus BYOL Settings

For PAYG deployments the variables image_name and product need to be configured accordingly, default values are set for PAYG.
Example: image_name = f5-bigip-virtual-edition-1g-best-hourly and product = f5-big-ip-best
For BYOL deployments the variables image_name, product, and licenses need to be configured accordingly.
Example: image_name = f5-big-all-2slot-byol, product = f5-big-ip-byol, and licenses = appropriate licenses.

Variables

Requirements

Name	Version
terraform	~> 0.13

Providers

Name	Version
azurerm	n/a

Inputs

Name	Description	Type	Default
projectPrefix	REQUIRED: Prefix to prepend to all objects created, minus Windows Jumpbox	`string`	`"ccbad9e7"`
adminUserName	REQUIRED: Admin Username for All systems	`string`	`"xadmin"`
adminPassword	REQUIRED: Admin Password for all systems	`string`	`"pleaseUseVault123!!"`
location	REQUIRED: Azure Region: usgovvirginia, usgovarizona, etc. For a list of available locations for your subscription use `az account list-locations -o table`	`string`	`"usgovvirginia"`
region	Azure Region: US Gov Virginia, US Gov Arizona, etc	`string`	`"US Gov Virginia"`
deploymentType	REQUIRED: This determines the type of deployment; one tier versus three tier: one_tier, three_tier	`string`	`"three_tier"`
deployDemoApp	OPTIONAL: Deploy Demo Application with Stack. Recommended to show functionality. Options: deploy, anything else.	`string`	`"deploy"`
sshPublicKey	OPTIONAL: ssh public key for instances	`string`	`""`
sshPublicKeyPath	OPTIONAL: ssh public key path for instances	`string`	`"/mykey.pub"`
cidr	REQUIRED: VNET Network CIDR	`string`	`"10.90.0.0/16"`
subnets	REQUIRED: Subnet CIDRs	`map(string)`	{ "application": "10.90.10.0/24", "external": "10.90.1.0/24", "inspect_ext": "10.90.4.0/24", "inspect_int": "10.90.5.0/24", "internal": "10.90.2.0/24", "management": "10.90.0.0/24", "vdms": "10.90.3.0/24", "waf_ext": "10.90.6.0/24", "waf_int": "10.90.7.0/24" }
f5_mgmt	F5 BIG-IP Management IPs. These must be in the management subnet.	`map(string)`	{ "f5vm01mgmt": "10.90.0.4", "f5vm02mgmt": "10.90.0.5", "f5vm03mgmt": "10.90.0.6", "f5vm04mgmt": "10.90.0.7" }
f5_t1_ext	Tier 1 BIG-IP External IPs. These must be in the external subnet.	`map(string)`	{ "f5vm01ext": "10.90.1.4", "f5vm01ext_sec": "10.90.1.11", "f5vm02ext": "10.90.1.5", "f5vm02ext_sec": "10.90.1.12" }
f5_t1_int	Tier 1 BIG-IP Internal IPs. These must be in the internal subnet.	`map(string)`	{ "f5vm01int": "10.90.2.4", "f5vm01int_sec": "10.90.2.11", "f5vm02int": "10.90.2.5", "f5vm02int_sec": "10.90.2.12" }
f5_t3_ext	Tier 3 BIG-IP External IPs. These must be in the waf external subnet.	`map(string)`	{ "f5vm03ext": "10.90.6.4", "f5vm03ext_sec": "10.90.6.11", "f5vm04ext": "10.90.6.5", "f5vm04ext_sec": "10.90.6.12" }
f5_t3_int	Tier 3 BIG-IP Internal IPs. These must be in the waf internal subnet.	`map(string)`	{ "f5vm03int": "10.90.7.4", "f5vm03int_sec": "10.90.7.11", "f5vm04int": "10.90.7.5", "f5vm04int_sec": "10.90.7.12" }
internalILBIPs	REQUIRED: Used by One and Three Tier. Azure internal load balancer ips, these are used for ingress and egress.	`map(string)`	`{}`
ilb01ip	REQUIRED: Used by One and Three Tier. Azure internal load balancer ip, this is used as egress, must be in internal subnet.	`string`	`"10.90.2.10"`
ilb02ip	REQUIRED: Used by Three Tier only. Azure waf external load balancer ip, this is used as egress, must be in waf_ext subnet.	`string`	`"10.90.6.10"`
ilb03ip	REQUIRED: Used by Three Tier only. Azure waf external load balancer ip, this is used as ingress, must be in waf_ext subnet.	`string`	`"10.90.6.13"`
ilb04ip	REQUIRED: Used by Three Tier only. Azure waf external load balancer ip, this is used as ingress, must be in inspect_external subnet.	`string`	`"10.90.4.13"`
app01ip	OPTIONAL: Example Application used by all use-cases to demonstrate functionality of deploymeny, must reside in the application subnet.	`string`	`"10.90.10.101"`
ips01ext	Example IPS private ips	`string`	`"10.90.4.4"`
ips01int	n/a	`string`	`"10.90.5.4"`
ips01mgmt	n/a	`string`	`"10.90.0.8"`
winjumpip	REQUIRED: Used by all use-cases for RDP/Windows Jumpbox, must reside in VDMS subnet.	`string`	`"10.90.3.98"`
linuxjumpip	REQUIRED: Used by all use-cases for SSH/Linux Jumpbox, must reside in VDMS subnet.	`string`	`"10.90.3.99"`
instanceType	BIGIP Instance Type, DS5_v2 is a solid baseline for BEST	`string`	`"Standard_DS5_v2"`
jumpinstanceType	Be careful which instance type selected, jump boxes currently use Premium_LRS managed disks	`string`	`"Standard_B2s"`
appInstanceType	Demo Application Instance Size	`string`	`"Standard_DS3_v2"`
image_name	REQUIRED: BIG-IP Image Name. 'az vm image list --output table --publisher f5-networks --location [region] --offer f5-big-ip --all' Default f5-bigip-virtual-edition-1g-best-hourly is PAYG Image. For BYOL use f5-big-all-2slot-byol	`string`	`"f5-bigip-virtual-edition-1g-best-hourly"`
product	REQUIRED: BYOL = f5-big-ip-byol, PAYG = f5-big-ip-best	`string`	`"f5-big-ip-best"`
bigip_version	REQUIRED: BIG-IP Version. Note: verify available versions before using as images can change.	`string`	`"14.1.400000"`
licenses	BIGIP Setup Licenses are only needed when using BYOL images	`map(string)`	{ "license1": "", "license2": "", "license3": "", "license4": "" }
hosts	n/a	`map(string)`	{ "host1": "f5vm01", "host2": "f5vm02", "host3": "f5vm03", "host4": "f5vm04" }
dns_server	REQUIRED: Default is set to Azure DNS.	`string`	`"168.63.129.16"`
asm_policy	REQUIRED: ASM Policy. Examples: https://github.com/f5devcentral/f5-asm-policy-templates. Default: OWASP Ready Autotuning	`string`	`"https://raw.githubusercontent.com/f5devcentral/f5-asm-policy-templates/master/owasp_ready_template/owasp-auto-tune-v1.1.xml"`
ntp_server	n/a	`string`	`"time.nist.gov"`
timezone	n/a	`string`	`"UTC"`
onboard_log	n/a	`string`	`"/var/log/startup-script.log"`
tags	Environment tags for objects	`map(string)`	{ "application": "f5app", "costcenter": "f5costcenter", "environment": "f5env", "group": "f5group", "owner": "f5owner", "purpose": "public" }

Outputs

Name	Description
DemoApplication_443	Public IP for applications. Https for example app, RDP for Windows Jumpbox, SSH for Linux Jumpbox
rSyslogdHttp_8080	Public IP for applications. Https for example app, RDP for Windows Jumpbox, SSH for Linux Jumpbox
tier_one	One Tier Outputs: VM IDs, VM Mgmt IPs, VM External Private IPs
tier_three	Three Tier Outputs: VM IDs, VM Mgmt IPs, VM External Private IPs

Deployment

For deployment you can do the traditional terraform commands or use the provided scripts.

terraform init
terraform plan
terraform apply

OR

./demo.sh

Docker

There is also a dockerfile provided, use make [options] to build as needed.

make build
make shell || make azure || make gov

Destruction

For destruction / tear down you can do the trafitional terraform commands or use the provided scripts.

terraform destroy

OR

./cleanup.sh

Docker

make destroy || make revolution

Development

Outline any requirements to setup a development environment if someone would like to contribute. You may also link to another file for this information.

# test pre commit manually
pre-commit run -a -v

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f5-azure-saca's Introduction

F5 & Azure Secure Cloud Computing Architecture

Introduction

Prerequisites

Important configuration notes

PAYG versus BYOL Settings

Variables

Requirements

Providers

Inputs

Outputs

Deployment

Docker

Destruction

Docker

Development

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