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Filtering by source and destination IP, IP protocol, source and destination port for TCP and UDP trafficLimit simultaneous connections on a per-rule basispfSense software utilizes p0f, an advanced passive OS/network fingerprinting utility to allow you to filter by the Operating System initiating the connection. Want to allow FreeBSD and Linux machines to the Internet, but block Windows machines? pfSense software allows for that (amongst many other possibilities) by passively detecting the Operating System in use.Option to log or not log traffic matching each rule.Highly flexible policy routing possible by selecting gateway on a per-rule basis (for load balancing, failover, multiple WAN, etc.)Aliases allow grouping and naming of IPs, networks and ports. This helps keep your firewall ruleset clean and easy to understand, especially in environments with multiple public IPs and numerous servers.Transparent layer 2 firewalling capable - can bridge interfaces and filter traffic between them, even allowing for an IP-less firewall (though you probably want an IP for management purposes).Packet normalization - Description from the pf scrub documentation - "'Scrubbing' is the normalization of packets so there are no ambiguities in interpretation by the ultimate destination of the packet. The scrub directive also reassembles fragmented packets, protecting some operating systems from some forms of attack, and drops TCP packets that have invalid flag combinations."Enabled in the pfSense software by defaultPfsense Firewall RouterReady to use. Current version 2.1.5 installed on 4GB Industrial Compact Flash.1x WAN, 3x LAN, 1x wireless Access PointWAN - DHCPLAN - 192.168.1.1*Opt1 - 192.168.2.1Opt2 - 192.168.3.1wifi - WPA2 PWD "pfsense123"*admin / pfsenseTech Specs:Intel Celeron M 1.50ghz CPU (very reliable)1GB DDR2 Memory4GB Transcend Industrial CompactFlash Drive.4x Ethernet ports2x USB ports.Serial Console (cable provided).Embedded Industrial motherboard - (Very reliable - 20 watts).Power supply included.