Registering a third-party to your Service Composer is done by following the instructions provided by the third-party. There is no standardization of method and therefore each third-party's system of registering to your Service Composer may be a little different. Some companies even provide an agent appliance that runs on your vSphere, while others do not. This is an example of the steps to register your Service Composer to Palo Alto Networks (PAN).
Making sure an organization's software-defined network (SDN) is secure is the main concern for any organization looking to move to the cloud. This course illustrates how NSX, VMware's SDN solution, provides not just a virtual network environment but also a microsegmentation of security in a business context, down to the level of each application for each tenant. This security aspect of NSX can be an eye-opener for many people. Here Bill Ferguson covers edge firewalls and distributed firewalls, role-based security administration, and security control with Service Composer, a tool that allows you to inspect all the data your network sends and receives.
Make sure to watch Bill's Up and Running with VMware NSX for tips on setting up your network.
Creating a software-defined data center (SDDC)
Configuring and testing distributed and edge firewalls