DROP firewall rules

[wiring8228]

I would suggest adding a new section to the OPNsense documentation under https://docs.opnsense.org/manual/how-tos/drop.html for the new default firewall rules.

The sections "Step 2 - Firewall Rules Inbound Traffic" and "Step 3 - Firewall Rules Outbound Traffic" currently do not appear to document the new rules that are now included by default (presumably since OPNsense 26.7).

In my case, I have configured it as follows using the new rules:

• Enabled: ✅
• Categories: Threat Intelligence
• Description: Block Spamhaus DROP
• Interface: LAN, WAN
• Quick: ✅
• Action: Block
• Direction: In
• Version: any
• Protocol: any
• Source: Spamhaus_DROPv4, Spamhaus_DROPv6
• Source Port: any
• Destination: any
• Destination port: any