The networking space is an excellent example of FOSS, with feature-packed firewalls, routers, VPNs and even UTMs, for nearly every need. With open-source networking you can enjoy the benefits of lower costs, greater security, flexibility, extensibility and full enterprise support. Vyatta is a compelling offering for those looking for a quality routing and security solution with all the benefits open source. The next time you’re making a purchasing decision make sure consider these quality solutions and you will see how cost, increased security and overall stability are improved.”]
Source: https://www.csoonline.com/article/2125265/network-security–three-open-source-options.html