I've run an Ethereum full node using Geth. I want to know if my public IP is exposed? Could hackers target my machine through the Internet?
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yes your node will be exposed to the public you could check it in https://www.ethernodes.org/network/1/nodes you will find your public IP.
hackers indeed could target your machine (Dos) and scan its ports to search for any any vulnerability. Use a VPN or TOR to hide your real IP and configure your firewall to permit only the ports that Geth uses.
answered Oct 21, 2016 at 15:29
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2Tor won't work as it's TCP-based, whereas Ethereum also requires UDP (for peer discovery). A VPN or proxy is the best bet. Commented Oct 21, 2016 at 17:28
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1@RichardHorrocks yes for peer discovery but ONLY for peer discovery. If you manually add a few nodes, you can use Ethereum over TOR, transactions can be relayed. Took me a while to understand the distinction and even though it is 5 years later I want to help make this better understood.– CQMCommented Jun 13, 2021 at 8:55