...

• an external firewall,
• the operating system firewall of the instance (see Installing the VPC License Server and Client in a Cloud EnvironmentCharon-SSP VPC in the Cloud),
• security list of the subnet to which the instance belongs, and
• VNIC-specific Network Security Groups.

...

Please see the relevant Oracle documentation for more information and configuration detail.

 Traffic is allowed if any rule in any of the relevant lists and groups allows the traffic. Traffic is also allowed if it  is the response traffic of a permitted tracked connection. At In addition to allowing SSH access, at least TCP port 8083 must be allowed to enable a license client to access a VPC license server. If the web interface is to be used, TCP port 8084 must also be allowed.

...

• an external firewall,
• the operating system firewall of the instance,
• AWS security groups, and
• AWS network ACLs.

The In addition to allowing SSH access, the different firewall levels must be configured to permit at least TCP port 8083 to enable a license client to access a VPC license server. If the web interface is to be used, TCP port 8084 must also be allowed.

...

Please see the relevant AWS documentation for more information and configuration details.

Azure Firewall Considerations

Access to an Azure cloud instance can be controlled by

• an external firewall,
• the operating system firewall of the instance,
• Azure Network Security Groups (NSGs).

In addition to allowing SSH access, the different firewall levels must be configured to permit at least TCP port 8083 to enable a license client to access a VPC license server. If the web interface is to be used, TCP port 8084 must also be allowed.

Network Security Groups

Network Security Groups can be associated to interfaces or subnets. Security rules in network security groups enable you to filter the type of network traffic that can flow in and out of virtual network subnets and network interfaces. When a cloud instance is created, you can assign a default security group to its interface (allowing SSH). Please refer to the following tutorial for more information: https://docs.microsoft.com/en-us/azure/virtual-network/tutorial-filter-network-traffic.