IT security products have become as complex as the networks they’re trying to secure. A firewall is a network security device that monitors incoming and outgoing network traffic and permits or blocks data packets based on a set of security rules. Its purpose is to establish a barrier between your internal network and incoming traffic from external sources (such as the internet) in order to block malicious traffic like viruses and hackers. Buy Firewall’s from Techbar Technology – Fortinet, SonicWall, SOPHOS, Cisco Authorized Dealers in Dubai.