pfSense basic firewall setup

pfSense Firewall

Important Firewall rules are applied in top-to-bottom order

Create Alias

Add an alias to list all the private IP addresses as per RFC1918
pfsense > firewall > Alias > IP > Add > Network

# RFC1918
10.0.0.0/8 
172.16.0.0/12
192.168.0.0/16

Create Rule

pfsense > firewall > Rules > Add

# Rule1 [All VLANs]
# to access internet and block all LAN addresses
Action: Pass
Protocol: Any
Source: Any
Destination: Ignore Alias RFC1918
Save!

# Rule2 [ExperimentalLAN]
# to access ExperimentalLAN from any LAN
Action: Pass
Protocol: Any
Source: Any
Destination: ExperimentalLAN
Save!