1)   InJoy Dialer 3
InJoy offers unattended operation, robust [24/7] connections, Firewall protection, Internet Gateway, and powerful IPSec VPN capability. It's the perfect choice for dial-up based embedded systems, mobile workers and the home-network gateway.

 2)   Emsa Port Blocker 1.0.15
Emsa Port Blocker is a TCP blocking utility. What it does, is blocking unwanted tcp access from/to your computer with customizable rules. It is not a firewall, but acts in a somewhat similar fashion. Freeware.