NeT Firewall 

NeT Firewall is a comprehensive stateful firewall solution built to protect Windows-based systems not currently protected by a firewall.
firewall solution

NCP Secure Entry VPN/PKI Client Win32 

NCP Secure Entry Client for communication with any IPSec gateway (compatibility list at http://www.ncp.de). It supports all transmission networks as well as Windows operating systems and has an integrated Personal Firewall.
ncp remote access mobile computing teleworking secure wlan secure hotspot secure networking secure internet vpn virtual private network ipsec zertifikate zertifizierung registration authority

VisNetic Firewall 

More secure than application-level firewalls, yet more cost effective than competing packet-level firewalls, VisNetic Firewall provides protection to Windows-based Servers, stand alone PCs, and/or LAN workstations from internal and external threats.
firewall firewall software network security