Symantec Email Security.cloud - Symantec Email Security.cloud provides always-on, inbound and outbound email security against malware, targeted attacks, and advanced threats
ufw - Ufw stands for Uncomplicated Firewall, and is program for managing a netfilter firewall.
pfSense - pfSense is a free and open source firewall and router that also features unified threat management, load balancing, multi WAN, and more
LuLu by Objective-See - LuLu is the free open-source macOS firewall that aims to block unauthorized (outgoing) network...
SonicWall - SonicWall security solutions protects your network, systems, users and data from cyber threats.
Plasma Firewall - Plasma Firewall is an open-source control panel with which you can manage your system firewall.