Firewall免費之防火牆

Windows Firewall Control(sphinx-soft),
http://www.personalfirewall.comodo.com/download_firewall.html (支援中文)
simplewall(henrypp.org),
Privatefirewall,
http://www.softking.com.tw/soft/click_share.asp?fid3=3264
(開放源碼) http://sourceforge.net/projects/pktfilter/

online-armor,
TinyFiwall,
GhostWall,

LINUX系統用:
(開放源碼) fs-security,pfsense,

下面防火牆公司環境使用要付費
ZoneAlarm-Firewall

Ashampoo-Firewall

http://www.pctools.com/zh/firewall/download/

Softperfect firewall

Sunbelt Personal Firewall

Outpost Firewall Free