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Security considerations for accessing NAS in external network (slrpnk.net)

submitted 2 years ago by Emotet@slrpnk.net to c/selfhosted@lemmy.world

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I'm strongly considering adding another backup location in the form of an old Raspberry Pi and a USB HDD.

I want the Pi to exclusively use the available network to connect to my Wireguard Server, so other devices (local to the Wireguard Server and remote connected to the server) can use it as a secondary backup location.

I'm kind of worried about a scenario, where my network is compromised and, through the VPN connection of the Pi in the external network, the external network is as well.

What are the best practices to secure such a setup?

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[–] jet@hackertalks.com 6 points 2 years ago (1 children)

This is a exercise in network DMZ planning. Assume the NAS will be compromised, so you limit its access to the rest of the network.

put the NAS on its own VLAN in both locations, setup firewall rules so that only select protocols are allowed to/from the NAS.

[–] Emotet@slrpnk.net 1 points 2 years ago (1 children)

That'd be the gold standard. Unfortunately, the external network utilizes infrastructure that doesn't support specifying firewall rules on the existing separate VLAN, so all rules would have to be applied on the Pi itself or on yet another device between, which is something I'd like to avoid. Great general advice, though!

[–] Trainguyrom@reddthat.com 5 points 2 years ago

so all rules would have to be applied on the Pi itself

Sounds like you'll want to setup IPTables