After detecting possible malicious external scanning, an internal vulnerability scan was performed, and a critical...

What is that application for? "The DMZ is a special network zone designed to house systems that receive connections from the outside world, such as web and email servers. Sound firewall designs place these systems on an isolated network where, if they become compromised, they pose little threat to the internal network because connections between the DMZ and the internal network must still pass through the firewall and are subject to its security policy"

Creating a proper DMZ for outdated components and segregating the JBoss server is the best action to take first to prevent server compromise and business disruption at the same time. A DMZ (demilitarized zone) is a network segment that separates internal networks from external networks, such as the internet, and provides an additional layer of security3. Creating a proper DMZ for outdated components and segregating the JBoss server can isolate and protect the critical server from external attacks that may exploit its vulnerability.