TinyWall - Lightweight and non-intrusive firewall
Imperva Cloud Application Security - Deploy your applications and data where you want. When you want. Imperva keeps them secure in the cloud, on premises, and in hybrid clouds.
SonicWall - SonicWall security solutions protects your network, systems, users and data from cyber threats.
Sucuri - Website Protection, Malware Removal, and Blacklist Prevention
pfSense - pfSense is a free and open source firewall and router that also features unified threat management, load balancing, multi WAN, and more
Incapsula - Incapsula is a Security CDN that makes any website safer, faster and more reliable. 5 minute setup will make a world of difference.