Firewall Requirements

Several components in the Stellar Cyber product require certain ports and domains be accessible through your firewall. Use the legend and tables below to understand which are appropriate for your environment.

Also see: Log Parser Ports.

Legend

CM: Configuration Manager*
DA: Data Analyzer*
DL: Data Lake*
DP: Data Processor
LAS: Linux Server (Agent) Sensor
MS: Modular Sensor
NS: Network Sensor
SS: Security Sensor
WAS: Windows Server (Agent) Sensor

^{*Although these are part of the DP, they have unique IP addresses so are listed independently in the table below.}

Ports for Associated Stellar Cyber VMs

When configuring the DP with separate VMs for the DL and DA (or in a cluster with additional worker nodes), all nodes must be in the same VPC and all ports between the nodes must be open in your firewall.

Open All TCP Ports Between Internal Addresses of Associated Stellar Cyber VMs

All TCP ports must be open between the internal network addresses of associated Stellar Cyber VMs, either in a cluster or a standard deployment with separate DL-m and DA-m VMs. For example, in a standard deployment with the DL-m on 172.31.7.0/24 and the DA-m on 172.31.10.0/24, the following rules must exist:

The DL-m must have a rule that allows all inbound TCP traffic from the 172.31.10.0/24 subnet.
The DA-m must have a rule that allows all inbound TCP traffic from the 172.31.7.0/24 subnet.

Stellar Cyber recommends that you add a firewall rule to allow all for clustered VMs (or just the DA and DL VMs in a standard deployment) and set the priority of that rule higher than the standard rule for the VPC.

General Purpose Ports

Source	Destination	Port	Protocol	Required?	Purpose
SSH client	DL, DA, LAS, NS, SS, MS	22	TCP	Optional	Management access
DL	Mail Server	25, 465. 587	TCP	Optional	Sending system notifications and configured email alerts for ATH rules
DA	whois	43	TCP	Required for certain alert types	Performing address lookups to a local in-country registrar (actual address varies per geography)
DL, DA, Sensors	DNS Server Environment specific	53	UDP	Required	Name service for: Downloading third-party libraries Support of customer configured Active Directory CM communication (if CM is by name vs IP)
DL	OKTA Server Environment specific	80, 443	TCP	Optional	(Optional) For customer configured OKTA SSO SAML Authentication
DL, DA, All sensors	NTP Server	123	UDP	Required	Performing time synchronization
Client web browser	DL	443	TCP	Required	Displaying user interface
NS, LAS	SS	4789, 8472 Environment specific	UDP	Required	VXLAN packet forwarding
NS	SS	5123	TCP	Required	Local file assembly over HTTPS
WAS, LAS, NS, SS, MS	DL	6640-6648	TCP with TLS 1.2	Required	Communicating with the CM.
WAS, LAS, NS, SS, MS	DL	8443	TCP (HTTPS with TLS 1.2)	Required	Downloading software and files from the DP, including custom log parsers.
WAS, LAS, NS, SS, MS	DA	8888, 8889	TCP (HTTPS with TLS 1.2)	Required	Receiver ports for communicating with the DA
WAS, LAS, NS, SS, MS	MS with Aggregator Enabled	6640-6648, 8443, 8888, 8889	TCP Proxy	Required	Must be open for communications between sensor and aggregator.

Domains

All of the following domains are required.

Source	Destination	Port	Protocol	Purpose
DL, DA	privateregistry.stellarcyber.ai (previously 50.220.129.169)	443	TCP	Private docker registry server for software updates Note: Because there are numerous stellarcyber.ai subdomains, you may find it simpler to open *.stellarcyber.ai.
DL, DA	acps.stellarcyber.ai	443	TCP	Downloading software installers/metarepo, IOC feed, IDS signature update and license validation
NS, SS, MS	archive.ubuntu.com security.ubuntu.com esm.ubuntu.com ppa.launchpad.net	443 80	TCP	Software updates.
LAS	For centos/redhat servers: domains included in the repository configuration files (/etc/yum.repo.d/.repo) dl.fedoraproject.org mirrors.fedoraproject.org	Environment specific	TCP	Customer configured port for accessing the OS provider's server (repository) for application updates
LAS	For SUSE servers: domains in the repository configuration files /etc/zypp/repos.d/*.repo	Environment specific	TCP	Customer configured port for accessing the OS provider's server (repository) for application updates
LAS	For Ubuntu servers: hosts in the ubuntu /etc/apt/source.list	Environment specific	TCP	Customer configured port for accessing the OS provider's server (repository) for application updates
LAS	launchpadlibrarian.net	80	TCP	Software updates
LAS	http://download.webmin.com	80	TCP	Software updates
NS, SS, MS	dl.stellarcyber.ai	443, 80	TCP	Downloading files during upgrade
Client System	doc-server.stellarcyber.ai	443	TCP	Accessing online help from Stellar Cyber documentation server
Client System	amazonaws.com	443	TCP	Accessing the Product Roadmap portal from Stellar Cyber user interface.
DL, DA	docker.com, .docker.com, docker.io, .docker.io quay.io, *.quay.io	443	TCP	Software updates . As indicated, also include all subdomains of docker.com and docker.io. If the private registry is enabled, then this domain is optional
DL, DA	k8s.gcr.io, registry.k8s.io prod-registry-k8s-io-eu-central-1.s3.dualstack.eu-central-1.amazonaws.com	443	TCP	Downloading updated container images from the Kubernetes registry. The k8s.gcr.io domain is the legacy registry and is migrating to registry.k8s.io in Kubernetes 1.25. The *amazonaws.com domain is an AWS S3 bucket used to optimize the delivery of container images in the EU based on geographic proximity.
WAS	live.sysinternals.com/sysmon.exe	443	TCP	Optional. Domain is required if the customer wants to install feature
LAS, NS, SS, MS	pypi.python.org pypi.org	443	TCP	For installation and update of required packages
LAS, NS, SS, MS	pythonhosted.org	443	TCP	For installation and update of required packages
DL, NS, SS, MS	sandbox.stellarcyber.ai	443	TCP	(Optional) Domain is required if the customer wants Malware Sandbox capability
MS	Environment specific	Environment specific	TCP	(Optional) Customer configured host and port for Tenable vulnerability scanning support

Data Sinks & Backups

The indicated ports are required to use the associated feature.

Source	Destination	Port	Protocol	Purpose
STORAGE
DL	Customer configured host and folder	22	TCP	SCP backups
DL	AWS S3 bucket	443	TCP	AWS S3 storage
DL	Customer configured host and port	usually 2049 or 111	TCP or UDP	NFS storage
DL	Customer configured Azure destination container (endpoint)	443	TCP	Azure Blob
DL	Customer configured region and namespace	443	TCP	Oracle (OCI)
DATA SINKS
DL, DA	Customer configured region and bucket	443	TCP	AWS S3
DL, DA	Customer configured address	8088	TCP	Splunk
DL, DA	Customer configured address	9092	TCP	Kafka
DL, DA	Customer configured address	9300	TCP	Elasticsearch
DL, DA	Customer configured Azure destination container (endpoint)	443	TCP	Azure Blob
DL, DA	Customer configured host and port	usually 2049 or 111	TCP or UDP	NFS
DL, DA	cloud.google.com storage bucket configured by customer	443	TCP	Google (GCP) cloud storage bucket

Connector/Parser-specific

In addition to the general requirements above, review the following for your specific connector and parser choices:

For any connector, you must also allow access between the sensor (or DP if applicable) and the API hosts/URLs you specify during configuration.
In most cases, connector communication is over port TCP 443. Connectors with unique requirements are shown below.
For connectors running on the DP, configure the firewall with the DA IP address for Collect functions and the DL IP address for the Respond functions.
For the ports to open for sensors receiving logs from devices on your network see Log Parser Ports Also, refer to Using the Port Relay Feature to Minimize Open Ports for information on relaying traffic sent to the generic syslog port to its appropriate vendor-specific parser.

Source	Destination	Port	Protocol	Connector
NS, SS, MS	AD Server and domain specified in connector configuration	AD: 443 LDAP/S 389 or 636	TCP	Active Directory
SS, NS, MS	Customer configured address	443, 8834	TCP	Tenable Nessus Security Center
SS, NS, MS	Customer configured address	3780 (Configurable)	TCP	Rapid7
DP	api.barracudanetworks.com	443	TCP	Barracuda Email server