No specific info about version 2.1. Please visit the main page of AdmFirewall Client on Software Informer.
It enables you to protect your computer against Internet threats.
Manage and enhance your Windows Firewall with extra functionality.
NeT Firewall is a comprehensive stateful firewall solution.
It is a complete solution designed for bypassing any firewall or restriction.
DShield Universal Firewall Client is a Windows client program for all firewalls
It protects your PC from unwelcome access from the outside.