Nessus is an open-source vulnerability assessment scanner that follows a client/server model. The Nessus server (nessusd) only runs on UNIX, but there are Nessus clients available for both UNIX and Windows.
Trellix IPS supports the popular Windows client, NessusWX. Note that NessusWX reports should be saved as plain text, since in this case, Trellix IPS supports only plain text format.