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These kinds of concerns are why I put all my "untrusted" devices on a separate VLANs, so I can reliably shut them out of the internet. Simple VLAN-enabled swit
by dvdkhlng 7y ago
These kinds of concerns are why I put all my "untrusted" devices on a separate VLANs, so I can reliably shut them out of the internet. Simple VLAN-enabled switches don't cost that much any more. Such a switch allows you to treat any port of the switch as a distinct network interface on your main router, where you can just disable forwarding for selected interfaces entirely. It also prevents your untrusted devices from seeing each other, i.e. your printer wont't be physically able to send ethernet frames to your VoIP phone, even if connected to the same switch. Here is some introduction to the concept:
http://corecom.com/external/livesecurity/vlans.htm http://corecom.com/external/livesecurity/vlans.htm
- fucking_tragedy 7y ago> Simple VLAN-enabled switches don't cost that much any more. They're dirt cheap and have been for the better part of a decade. If you're looking to upgrade, cost isn't a reason not to.
- dngray 7y agoI did exactly that: • http://wiki.alpinelinux.org/wiki/Linux_Router_with_VPN_on_a_Raspberry_Pi http://wiki.alpinelinux.org/wiki/Linux_Router_with_VPN_on_a_... • https://wiki.alpinelinux.org/wiki/Linux_Router_with_VPN_on_a_Raspberry_Pi_(IPv6) https://wiki.alpinelinux.org/wiki/Linux_Router_with_VPN_on_a... My printer is in a VLAN which has no route out over the Internet. (The second link there uses VLANs).
- jlgaddis 7y agoVLANs, huh? I'll have to Google that sometime. ;)
- dvfjsdhgfv 7y agoTrue, but assigning it a static IP and blocking egress traffic originating from it should accomplish the same thing.
- dvdkhlng 7y agoI think static IPs and blocking egress traffic only keeps well-behaved devices from doing any harm. It does not protect you from compromised, malicous (IoT) devices. Think about a network printer doing ARP spoofing and MiTM-attacking your VoIP phone or IP cam. E.g. googeling immediately turns up vulnerabilities like this [1] one. A properly configured VLAN setup can help to prevent or limit this threat. [1] https://www.scmagazine.com/home/network-security/hp-officejet-printers-bug-puts-entire-network-at-risk-coupled-with-eternalblue/ https://www.scmagazine.com/home/network-security/hp-officeje...
- DCoder 7y agoNew printer next year: "Hmm, I can't contact my telemetry server with these internet settings… time to connect to any open Wi-Fi I can find nearby!"