Endian Firewall is a Unified Threat Management (UTM) Appliance that protects networks and improves connectivity. Based on Red Hat Enterprise Linux, Endian Firewall is 100% open source and includes a wide variety of features, such as stateful inspection firewall, HTTP/FTP anti-virus, content filter, POP3/SMTP anti-virus, anti-phishing and anti-spam tools, true SSL/TLS VPN, IDS, and other features.