I installed Avira Premium Security Suite. I want to test the features (firewall, etc). I cannot use any online firewall testing services because my computer is connected to a router (D-Link DSL-2640T with built-in modem, 4 ports switch and Wireless Access Point) which has built-in firewall. If I use any online firewall testing services provided by any website, it will test my modem's firewall instead of testing my computer's firewall. I share the same internet connection with my family members. I cannot switch my modem to bridge mode because it will cause other users cannot surf the internet. So, I am looking for a software, either open source free software or proprietary freeware to help me test my computer's security risk. Budgets very limited. So, anyone have any suggestion?