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suricata-nlb-as-cwl-cfn.json
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suricata-nlb-as-cwl-cfn.json
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{
"AWSTemplateFormatVersion": "2010-09-09",
"Description": "Create auto-scaled, load-balanced Suricata IDS",
"Parameters": {
"VpcId" : {
"Type" : "AWS::EC2::VPC::Id",
"Description" : "VpcId of your existing Virtual Private Cloud (VPC)",
"ConstraintDescription" : "must be the VPC Id of an existing Virtual Private Cloud."
},
"MinSize": {
"Type": "Number",
"Description": "Minumum number of instances in the Auto Scaling group",
"Default": 2
},
"MaxSize": {
"Type": "Number",
"Description": "Maxiumum number of instances in the Auto Scaling group",
"Default": 2
},
"Subnets" : {
"Type" : "List<AWS::EC2::Subnet::Id>",
"Description" : "The list of SubnetIds in your Virtual Private Cloud (VPC)",
"ConstraintDescription" : "must be a list of existing subnets associated with at different availability zones. They should be residing in the selected VPC."
},
"InstanceType": {
"Type": "String",
"Default": "t3.small",
"AllowedValues": [
"t3.small",
"t3.medium",
"t3.large",
"c5.large",
"c5n.large"
],
"Description": "Enter instance type; default is t3.small."
},
"OperatorEMail": {
"Description": "EMail address to notify if there are any scaling operations",
"Type": "String",
"AllowedPattern": "([a-zA-Z0-9_\\-\\.]+)@((\\[[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\.)|(([a-zA-Z0-9\\-]+\\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\\]?)",
"ConstraintDescription": "must be a valid email address."
},
"Keypair": {
"Type": "AWS::EC2::KeyPair::KeyName",
"ConstraintDescription": "must be the name of an existing EC2 KeyPair.",
"Description": "Key pair for the monitoring instance"
},
"LatestAmiId": {
"Type": "AWS::SSM::Parameter::Value<AWS::EC2::Image::Id>",
"Default": "/aws/service/ami-amazon-linux-latest/amzn2-ami-hvm-x86_64-gp2"
},
"SSHLocation": {
"Type": "String",
"Default": "0.0.0.0/0",
"AllowedPattern": "(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})/(\\d{1,2})",
"ConstraintDescription": "must be a valid CIDR range of the form x.x.x.x/x.",
"Description": "Allow SSH access to the Suricata instances from x.x.x.x/x",
"MaxLength": "18",
"MinLength": "9"
},
"VXLANLocation": {
"Type": "String",
"Default": "0.0.0.0/0",
"AllowedPattern": "(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})/(\\d{1,2})",
"ConstraintDescription": "must be a valid CIDR range of the form x.x.x.x/x.",
"Description": "Allow VXLAN traffic to Suricata instances from x.x.x.x/x",
"MaxLength": "18",
"MinLength": "9"
},
"LogRetention": {
"Type": "Number",
"Default": 3653,
"AllowedValues": [ 1, 3, 5, 7, 14, 30, 60, 90, 120, 150, 180, 365, 400, 545, 731, 1827, 3653],
"Description": "CloudWatch Logs retention in days"
}
},
"Resources": {
"LogGroup": {
"Type" : "AWS::Logs::LogGroup",
"Properties" : {
"RetentionInDays": { "Ref": "LogRetention"}
}
},
"NotificationTopic": {
"Type": "AWS::SNS::Topic",
"Properties": {
"Subscription": [ { "Endpoint": { "Ref": "OperatorEMail" }, "Protocol": "email" } ]
}
},
"SuricataLB": {
"Type": "AWS::ElasticLoadBalancingV2::LoadBalancer",
"Properties": {
"Scheme": "internal",
"Subnets": { "Ref": "Subnets" },
"Type": "network"
}
},
"SuricataListener": {
"Type": "AWS::ElasticLoadBalancingV2::Listener",
"Properties": {
"DefaultActions": [
{
"Type": "forward",
"TargetGroupArn": { "Ref" : "SuricataTargetGroup" }
}
],
"LoadBalancerArn": { "Ref" : "SuricataLB"},
"Port": 4789,
"Protocol": "UDP"
}
},
"SuricataTargetGroup": {
"Type": "AWS::ElasticLoadBalancingV2::TargetGroup",
"Properties": {
"HealthCheckPort": "22",
"Port": 4789,
"Protocol": "UDP",
"TargetType": "instance",
"VpcId": { "Ref" : "VpcId"}
}
},
"SuricataGroup": {
"Type" : "AWS::AutoScaling::AutoScalingGroup",
"Properties" : {
"VPCZoneIdentifier": { "Ref": "Subnets" },
"MinSize" : { "Ref" : "MinSize"},
"MaxSize" : { "Ref" : "MaxSize"},
"TargetGroupARNs": [
{ "Ref": "SuricataTargetGroup"}
],
"LaunchTemplate": {
"LaunchTemplateId": { "Ref" : "SuricataLaunchTemplate" },
"Version": "1"
},
"NotificationConfigurations": [
{
"TopicARN": { "Ref": "NotificationTopic" },
"NotificationTypes": [
"autoscaling:EC2_INSTANCE_LAUNCH",
"autoscaling:EC2_INSTANCE_LAUNCH_ERROR",
"autoscaling:EC2_INSTANCE_TERMINATE",
"autoscaling:EC2_INSTANCE_TERMINATE_ERROR",
"autoscaling:TEST_NOTIFICATION"
]
}
]
},
"CreationPolicy": {
"ResourceSignal": {
"Count": {"Ref": "MinSize"}
}
}
},
"SuricataLaunchTemplate": {
"Type": "AWS::EC2::LaunchTemplate",
"Metadata": {
"AWS::CloudFormation::Init": {
"configSets": {
"configure-all": [ "install-configure-cloudwatch-agent", "install-epel", "install-suricata"]
},
"install-epel": {
"commands": {
"install-epel-extra": {
"command": "amazon-linux-extras install epel -y"
}
}
},
"install-configure-cloudwatch-agent": {
"files": {
"/opt/aws/amazon-cloudwatch-agent/bin/config.json": {
"content": {
"logs":
{
"logs_collected": {
"files": {
"collect_list": [
{
"file_path": "/var/log/suricata/eve.json",
"log_group_name": { "Ref" : "LogGroup" }
}
]
}
}
}
}
}
},
"packages": {
"rpm": {
"cloudwatch-agent": "https://s3.amazonaws.com/amazoncloudwatch-agent/amazon_linux/amd64/latest/amazon-cloudwatch-agent.rpm"
}
},
"commands": {
"configure-agent": {
"command": "amazon-cloudwatch-agent-ctl -a fetch-config -c file:/opt/aws/amazon-cloudwatch-agent/bin/config.json -s"
}
}
},
"install-suricata": {
"packages": {
"yum": {
"suricata": []
}
},
"files": {
"/etc/sysconfig/suricata": {
"content": "OPTIONS=\"--set decoder.vxlan.enabled=true -k none -i eth0 --user suricata udp port 4789\""
}
},
"commands": {
"1-update-suricata": {
"command": "suricata-update"
},
"2-enable-hourly-updates": {
"command": "echo \"10 * * * * suricata-update && suricatasc -c reload-rules\" | crontab"
}
},
"services": {
"sysvinit": {
"suricata": {
"enabled": "true",
"ensureRunning" : "true",
"files": ["/etc/suricata/suricata.yaml"]
}
}
}
}
}
},
"Properties": {
"LaunchTemplateData": {
"IamInstanceProfile": {
"Name": { "Ref": "InstanceProfile" }
},
"ImageId": { "Ref": "LatestAmiId" },
"InstanceType": { "Ref": "InstanceType" },
"KeyName": { "Ref": "Keypair" },
"SecurityGroupIds": [
{
"Ref": "InstanceSecurityGroup"
}
],
"UserData": {
"Fn::Base64": {
"Fn::Join": [
"\n",
[
"#!/bin/bash -xe",
"yum install -y aws-cfn-bootstrap",
{
"Fn::Join": [
" ",
[
"/opt/aws/bin/cfn-init -v -c configure-all",
"--stack",
{
"Ref": "AWS::StackName"
},
"--resource SuricataLaunchTemplate",
"--region",
{
"Ref": "AWS::Region"
}
]
]
},
{
"Fn::Join": [
" ",
[
"/opt/aws/bin/cfn-signal",
"--stack",
{
"Ref": "AWS::StackName"
},
" --region ",
{
"Ref": "AWS::Region"
},
"--resource SuricataGroup"
]
]
}
]
]
}
}
}
}
},
"IAMRole": {
"Type": "AWS::IAM::Role",
"Properties": {
"AssumeRolePolicyDocument": {
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Principal": {
"Service": [
"ec2.amazonaws.com"
]
},
"Action": [
"sts:AssumeRole"
]
}
]
},
"Path": "/",
"ManagedPolicyArns": [
"arn:aws:iam::aws:policy/CloudWatchAgentServerPolicy"
]
}
},
"InstanceProfile": {
"Type": "AWS::IAM::InstanceProfile",
"Properties": {
"Path": "/",
"Roles": [
{
"Ref": "IAMRole"
}
]
}
},
"InstanceSecurityGroup": {
"Type": "AWS::EC2::SecurityGroup",
"Properties": {
"GroupDescription": "Enable SSH access via port 22",
"SecurityGroupIngress": [
{
"CidrIp": {
"Ref": "SSHLocation"
},
"FromPort": 22,
"IpProtocol": "tcp",
"ToPort": 22
},
{
"CidrIp": {
"Ref": "VXLANLocation"
},
"FromPort": 4789,
"IpProtocol": "udp",
"ToPort": 4789
}
],
"VpcId": { "Ref": "VpcId" }
}
}
},
"Outputs": {
"ASG": {
"Description": "Auto Scaling Group",
"Value": { "Ref": "SuricataGroup" }
},
"NLB": {
"Description": "Network Load Balancer",
"Value": { "Ref": "SuricataLB" }
},
"LogGroup": {
"Description": "CloudWatch Log Group",
"Value": { "Ref": "LogGroup" }
}
}
}