Techieism Project Spotlight
🏆 Our WorkEnterprise Firewall Deployment with Multi-WAN Load Balancing
A growing business was suffering frequent, prolonged network outages due to a single internet link with no failover and an unmanaged firewall leaving the network exposed. Techieism stepped in and deployed OPNsense — an enterprise-grade open-source firewall — purpose-configured for their environment. We set up multi-WAN load balancing across two ISP connections so traffic is distributed intelligently and if one link drops, the other takes over within seconds — invisibly to users. Hardened firewall rules were written to block unnecessary ports, restrict lateral movement, and geo-block high-risk regions. Traffic shaping (QoS) was applied to prioritise business-critical apps — ERP, VoIP, and video calls — over background traffic. The network was also segmented into VLANs separating staff, guest, and server traffic, improving both security and speed. The entire solution runs on OPNsense open-source software, completely replacing their existing paid proprietary firewall — eliminating the annual subscription fee and reinvesting that saving back into the business.