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Also question is, is pfSense a router?
pfSense is mostly used as a router and firewall software, and typically configured as DHCP server, DNS server, WiFi access point, VPN server, all running on the same hardware device.
Secondly, is pfSense a good firewall? pfSense is an excellent firewall - It logs all of your traffic. It has packages you can install to snort bad traffic. pfSense is an excellent load-balancer: (Multi-WAN and Server Load Balancing) The fail-over/aggregation works very well.
Regarding this, is pfSense better than router?
pfsense has a lot more options for that than a off-the-shelf router. maybe if you get a really expensive one that is for big companies that need security. But then pfsense is cheaper/better. Definitely another vote for a pfSense solution.
What is the purpose of pfSense?
pfSense is an open source firewall/router computer software distribution based on FreeBSD. It is installed on a physical computer or a virtual machine to make a dedicated firewall/router for a network.