I've got a network with multiple web- and gameservers open to the internet. I haven't taken any steps regarding network security besides using pfsense. Where can I get good advise on properly secure the network, for beginners in this area?
What I already have:
- pfSense (Firewall & Router; Dell R210 II)
- Managed Switches (D-Link DGS-3000 & DGS-1510)
- FreePBX-Server
- Two VM-Servers, running websites and minor services
- FreeNAS-Server with Nextcloud
- Multiple Gameservers (Windows Server 2019)
- Plex-Server
- ReverseProxy (Caddy)
- Private WiFi
- Three external networks connected via VPN, only for PBX and management)
What's the best place to start from here, without spending too much money on hardware but getting the most out of the security part?
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