Firewall Requirements

Please also see our Firewall Connectivity Guide for basic guidance when preparing to deploy an on-premise Netreo VA (whether as a stand-alone deployment or service engine).

External Communication

Netreo can operate without internet access. However, licensing, software updates, and remote support are greatly simplified with some basic Internet access.

Here are the firewall configuration requirements to get Netreo's online components working correctly.

For remote technical support

Netreo's remote support VPN functionality allows it to connect to a secure network that allows our support engineers to get remote access to the Netreo appliance.

If your firewall allows you to restrict access by domain name, you can use the following destination:

• Destination charon.netreo.net
  • Port UDP/1194 -or-
  • Port TCP/443

Application-aware firewalls will need to configure this as SSL/TLS and OpenVPN.

For automatic license updates

Netreo can automatically update its license over the Internet, so manually renewing it is unnecessary.

If your firewall allows you to restrict access by domain name, you can use the following destination:

• Destination activation.netreo.net:443

Application-aware firewalls will need to configure this as SSL/TLS or HTTPS.

For software updates

Netreo allows you to perform online software updates to receive the latest patches and fixes.

If your firewall allows you to restrict access by domain name, you can use the following destination:

• Destination updates.netreo.com:443

For mobile and cloud features

These features include the use of the Netreo Mobile application and the ability to initiate cloud-based remote web application performance monitoring.

Netreo uses various dynamic technologies to route and assign users to the best or closest cloud-hosted server, so it is not possible to restrict access to a specific group of IP addresses.

If your firewall allows you to restrict access by domain name, you can use the following destinations:

• Destination incident.api.netreo.com:443 - for all communication from Netreo to the cloud for publishing incidents.
• Destination heartbeat.api.netreo.com:443 - for all heartbeat messages from Netreo to the cloud.
• Destination *.api.netreo.com:443 - for accessing the Netreo cloud libraries.
• Destination mobile.api.netreo.com:443 - for primary communication to or from a mobile device.
• Destination vpn.api.netreo.com:443 - for providing live data to mobile devices.

For geocoding and time zone information

Used by the Netreo site and geographic map features. These domains must be allowed for the aforementioned features to work properly.

• api.geonames.org - time zone
• dev.virtualearth.net - geocoding

For Microsoft 365 email authentication

If you select the SMTP Authenticated Relay (Office 365) option in Mail Alerting Administration, Netreo will be required to have outbound access to the internet to login.microsoftonline.com on port TCP/443 for authentication.

For monitoring Amazon Web Services Resources

To monitor AWS resources, the Netreo appliance performing the checks (whether primary, replica, or service engine) must be able to reach the following domains.

• *.amazonaws.com

For sending email alerts

Netreo is generally configured to send alerts via email. Our best practice recommendation is to allow Netreo to communicate outbound to the Internet on port TCP/25, as this allows direct connections to smartphone gateways that you want to receive alerts.

If that access is not possible, you can relay SMTP mail through an internal server, however this creates a single point of failure for alerts if that relay host stops responding, so we recommend this configuration only as a last resort or for testing purposes.

Internal Communication

For web user UI access

Web users access the Netreo user interface through a web browser on the following ports:

• Port TCP/80
• Port TCP/443

Port access can optionally be restricted to TCP/443 only. (Requires the SuperAdmin user access level.)

For high availability cluster communication

For communication between cluster members. Only required if using a Netreo HA cluster.

• Port: TCP/443
• Port: TCP/4567
• Port: TCP/4568
• Port: TCP/4444
• Port: TCP/48100

For service engine communication

For communication between Netreo and its service engines. Required when using a service engine with a Netreo deployment (including high availability deployments).

• Port: TCP/443