https://osquery.io/

• processes
• users
• usb
• firewall
• ports
• security
• linux
• windows

https://oitibs.com/easy-debian-8-server-firewall/

• "debian 8"
• jessie
• firewall
• iptables
• persistent
• systemd

http://www.pfsense.org/

• firewall
• router
• security
• networking
• opensource
• sysadmin
• linux

http://www.ipfire.org/

• firewall
• linux
• network
• opensource
• router
• security
• software

http://elliptips.info/guide-debian-7-gerer-le-trafic-entrant-et-sortant-avec-iptables/

• debian
• wheezy
• iptables
• firewall

http://www.verot.net/socks.htm

• bypass
• firewall
• hotspots
• wifi
• hacking
• ssh
• tunnel