Eve-ng Images ✓

This is a gray area. Legally, most network operating systems require a valid license or a support contract from the vendor (Cisco, Juniper, Palo Alto).

Many engineers share "optimized" versions of images in various networking forums, though you should always scan these for security risks. Performance Tips for Large Labs eve-ng images

EVE-NG uses a specific folder hierarchy located in /opt/unetlab/addons/ . You can access these folders via SSH (using tools like WinSCP or FileZilla). This is a gray area

These usually require an "Idle PC" value to prevent the host CPU from hitting 100%. This is a gray area. Legally