How to connect two separate networks over internet

[jimware]

Hello everyone. So my problem is. I have my parents house and the house where I live that they are in big distance. In each house I have a vdsl connection and a small network inside. So my question is how can I connect those 2 networks from the internet and I can use it as one network? I tried with a VPN from my house to my parents house where I have a nas server and I successfully connected but I can only see the PCs in my parents house. From my parents house the nas cannot see my PC . In my nas server I have a home assistant instance for smart home so I want the same instance to read the smart plugs and the other stuff in my house. I don't want to build a second server. So how can I connect thought vdsl link those two networks to act as one network?
If anyone can help. Thank you!

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[Jerry66]

Hello, buy a mikrotik router and configure wireguard on it

[Tanisha]

If you're looking to connect two separate networks over the internet securely, setting up a site-to-site VPN is probably your best option. I’ve done something similar using OpenVPN with good results. Just make sure both routers or firewalls support VPN tunnels. While researching options, I came across Unionslots — not related to networking directly, but a handy distraction while waiting for configs to apply! Jokes aside, proper firewall rules and static IPs (or DDNS) help maintain a stable connection between sites.