Generic concepts
[pfSense/OPNsense] Blocking bad / risky IP addresses
Networking concepts
[pfSense] How network interfaces work
High availability
[pfSense] Configuring High Availability
[pfSense] Multiple WAN Connections
OpenVPN
[pfSense] Secure remote access for your home-office workers with OpenVPN
[pfSense] Configuring a Site-to-Site OpenVPN Instance
IPsec VPN
[pfSense] Configuring a Site-to-Site IPsec VPN
[pfSense] Site-to-site IPsec VPN with overlapping subnets
Traffic Shaping & Limiters
[pfSense] Configuring traffic shaping with CBQ
[pfSense] Limit maximum bandwidth per user with Limiters
User Management
[pfSense] Local user management
Backup and Recovery
[pfSense] Making automatic backups with AutoConfigBackup
[pfSense] Making automatic backups with a script
Upgrade and update
[pfSense] Upgrading pfSense (how-to)
Packages
[pfSense] The package system in pfSense
News about pfSense
pfSense 2.5.0 bugs and fixes after upgrade
pfSense 2.5.0 and pfSense Plus 21.02 now available