The SG-2220 is the follow-on recommended compact replacement system with a faster dual core Intel CPU and two Intel Gigabit NICs.
The SG-2440 is the next step up, with a faster dual core Intel CPU and four Intel Gigabit NICs.
The Netgate APU2 firewall is a low power embedded firewall/router system that provides excellent protection for your SOHO, Small Office and Remote Location networks.
pfSense is a free, open source firewall and router platform based on FreeBSD that is functionally competitive with expensive, commercial firewalls. pfSense is a stateful packet filtering firewall, which also serves as a LAN or WAN router, VPN Appliance, DHCP Server, DNS Server, or can be configured for other applications and special purpose Appliances. This next generation pfSense firewall features include:
** Squid, Snort, etc. require the full install of pfSense and a HDD/SSD to enable logging.