In contemporary IT contexts, secure inter-VLAN communication is essential for preserving the availability, confidentiality, and integrity of network resources. Secure communication between VLANs is a vital component of network security. It limits access to resources to authorized systems and users and lessens the potential harm caused by security events. Building a solid and secure network architecture requires careful VLAN segmentation implementation. As a consequence, the authors created an adaptable and affordable data protection solution that any company may use. Fortinet Firewall assists in providing inter-VLAN security. In the cybersecurity space, fortinet firewalls are highly respected for a number of reasons, including their scalability, application control, comprehensive protection, and unified threat management (UTM). With the right authorization, an organization may readily connect with one another using this Secure Inter-VLAN.