this post was submitted on 11 Nov 2024
34 points (94.7% liked)
Privacy
31975 readers
652 users here now
A place to discuss privacy and freedom in the digital world.
Privacy has become a very important issue in modern society, with companies and governments constantly abusing their power, more and more people are waking up to the importance of digital privacy.
In this community everyone is welcome to post links and discuss topics related to privacy.
Some Rules
- Posting a link to a website containing tracking isn't great, if contents of the website are behind a paywall maybe copy them into the post
- Don't promote proprietary software
- Try to keep things on topic
- If you have a question, please try searching for previous discussions, maybe it has already been answered
- Reposts are fine, but should have at least a couple of weeks in between so that the post can reach a new audience
- Be nice :)
Related communities
Chat rooms
-
[Matrix/Element]Dead
much thanks to @gary_host_laptop for the logo design :)
founded 5 years ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
If you are just looking to repurpose an old device for around the house use and it won't ever be leaving your home network, then the simplest method is to set a static IP address on the device and leave the default gateway empty. That will prevent it from reaching anything other than the local subnet.
If you have multiple subnets that the device needs to access you will need a proper firewall. Make sure that the device has a DHCP reservation or a static IP and then block outgoing traffic to the WAN from that IP while still allowing traffic to your local subnets.
If it is a phone who knows what that modem might be doing if there isn't a hardware switch for it. You can't expect much privacy when that modem is active. But like the other poster mentiond a private DNS server that only has records from your local services would at least prevent apps from reaching out as long as they aren't smart enough to fall back to an IP address if DNS fails.
A VPN for your phone with firewall rules on your router that prevent your VPN clients from reaching the WAN would hopefully prevent any sort of fallback like that.
Yes, this. It's important that your local DNS server does not even forward queries from the isolated subnet to external DNS, because these queries (and responses) can contain information. ("DNS tunneling").