Computer software and hardware for designing, controlling, and monitoring computer networks; computer software and hardware for encryption, data backup, access control, content filtering, packet filtering, network security, captive portal, intrusion detection, web caching, establishing virtual private networks, and for ensuring the security of electronic mail and electronic messaging; computer software for transmitting data, graphics, audio, or video over electronic communications networks; VPN (virtual private network) operating software; computer software for accessing, viewing, and controlling remote computers and devices; computer network routers; computer security software