Protecting Synology DS923+

Hello all,

I’m a home user that uses the synology DS923+ for backing up devices and main storage for all my photography work.
Since I am always careful about clicking on strange links in my email or visiting websites, I do not experience any security problems myself, but my other home users are less alert to this.
So I am looking for a good program to protect my nas but also the homeuser pc’s, to block all unwanted traffic to prevent attacks/ virus/ mallware etc.

I don’t know if there is something builtin for my nas alone, or maybe my unifi network? I have read that unifi offers also CyberSecure by Proofpoint, but a lot of users said this do almost nothing against attacks true email attacks. Some directed to zero trust cloudflare, but the information on this website is above my knowledge.
Hopefully someone could give me some advice what to do!

Thanks!