Selfhosted
A place to share alternatives to popular online services that can be self-hosted without giving up privacy or locking you into a service you don't control.
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First ask yourself what benefit you gain from isolating services.
Untrustworthy devices like work computers, smart TVs, and IoT sure have good reasons. Possibly a DMZ. But you might do as well to simply block all egress from a few internal IPs instead.
Move things slowly, because you’ll need to see what traffic needs to flow and what doesn’t, and you may find that you need some helper services for cross vlan (for example mDNS).
ETA: guest wifi is good too; force the traffic through firewall and keep it off your internal network
This is the correct answer. Unless you're just wanting to learn networking. Blocking outbound on shit that doesn't need it, and having a dmz if you're really really wanting to host outside of your environment is the best way. If someone is in your environment, vlans aren't going to stop them.
Don't block IPs as it provides fairly weak security.