FreeBSD setup Internet connections sharing with NAT firewall

Dru Lavigne has published a nice article for FreeBSD new (noobs) users.

From the article:
My previous article demonstrated how even novice BSD users can quickly create a working firewall to protect their own systems. Today I want to start with that base firewall and explore how to fine-tune rules, configure NAT so other PCs can share an Internet connection, and review firewall logs.

This article covers
=> FreeBSD NAT setup
=> Firewall log viewrs