A very promising Security Gateway with many features to protect your network, currently only available free if used within your Home.

Astaro Security Linux 7.010 (Stable 7.X branch) - Astaro Security Linux is an all-in-one network security gateway that includes a firewall, intrusion protection, virus protection, spam protection, URL filtering, and a VPN gateway. Features include stateful packet inspection, deep packet filtering, intrusion detection and prevention, portscan detection, content filtering, virus detection for email and Web traffic, profile handling, IPSec, SSL, and PPTP VPN tunneling, spam blocking, proxies for HTTP, FTP, POP3, SMTP, DNS, VoIP, SOCKS, and Ident, logging, and reporting. The WebAdmin, the Install Wizard, and Up2Date service make it easy to install, manage, and update. This Up2Date will fix various issues with SSL VPN, HTTP Proxy, Authentication, PPTP, and HA/Cluster.