Content area
The GateDefender Integra eSeries eSB provides all of the functionality we'd expect from a UTM, featuring a firewall, HTTP proxy, content filter, spam and anti-virus filters, intrusion prevention system and VPN functionality. However, the product, almost in its entirety, is comprised of freely available open source software. For example, the base operating system appears to be RedHat Linux, IPS services are provided via Snort, the HTTP proxy via squid, spam filter via SpamAssassin, and so on.