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, application-level intrusion
detection, content filtering, virus detection for email traffic (SMTP
and POP3) and Web traffic (HTTP), whitelists and blacklists, IPSec and
PPTP VPN tunneling, spam blocking, logging and reporting. The software
is built on an embedded, especially hardened Linux distribution. The
WebAdmin tool and Up2Date service make it easy to install, manage, and
update all six security applications.