Tor: hide your node's transactions and offer an onion RPC

sudo apt install tor
# /etc/tor/torrc
HiddenServiceDir /var/lib/tor/monero-p2p
HiddenServicePort 18084 127.0.0.1:18084
HiddenServiceDir /var/lib/tor/monero-rpc
HiddenServicePort 18089 127.0.0.1:18089

sudo systemctl restart tor
sudo cat /var/lib/tor/monero-p2p/hostname    # your-p2p-address.onion
sudo cat /var/lib/tor/monero-rpc/hostname    # your-rpc-address.onion

--tx-proxy tor,127.0.0.1:9050,10
--anonymous-inbound your-p2p-address.onion:18084,127.0.0.1:18084,25
# optional: also sync the chain over Tor (slower)
# --proxy 127.0.0.1:9050 --p2p-bind-ip 127.0.0.1

The inbound onion port must be unique (not 18080, and not 18083 if P2Pool uses it for ZMQ). It is for transaction relay, not blockchain sync.

monero-wallet-cli --proxy 127.0.0.1:9050 --daemon-address your-rpc-address.onion:18089

Feather Wallet has Tor built in and can be set to connect to onion nodes only.