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Gunar C. Gessner
2021-02-04 12:06:13 +00:00
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@@ -21,39 +21,39 @@ information in the debug log about your Tor configuration.
The first step is running Bitcoin Core behind a Tor proxy. This will already anonymize all
outgoing connections, but more is possible.
-proxy=ip:port Set the proxy server. If SOCKS5 is selected (default), this proxy
server will be used to try to reach .onion addresses as well.
You need to use -noonion or -onion=0 to explicitly disable
outbound access to onion services.
-proxy=ip:port Set the proxy server. If SOCKS5 is selected (default), this proxy
server will be used to try to reach .onion addresses as well.
You need to use -noonion or -onion=0 to explicitly disable
outbound access to onion services.
-onion=ip:port Set the proxy server to use for Tor onion services. You do not
need to set this if it's the same as -proxy. You can use -onion=0
to explicitly disable access to onion services.
Note: Only the -proxy option sets the proxy for DNS requests;
with -onion they will not route over Tor, so use -proxy if you
have privacy concerns.
-onion=ip:port Set the proxy server to use for Tor onion services. You do not
need to set this if it's the same as -proxy. You can use -onion=0
to explicitly disable access to onion services.
Note: Only the -proxy option sets the proxy for DNS requests;
with -onion they will not route over Tor, so use -proxy if you
have privacy concerns.
-listen When using -proxy, listening is disabled by default. If you want
to manually configure an onion service (see section 3), you'll
need to enable it explicitly.
-listen When using -proxy, listening is disabled by default. If you want
to manually configure an onion service (see section 3), you'll
need to enable it explicitly.
-connect=X When behind a Tor proxy, you can specify .onion addresses instead
-addnode=X of IP addresses or hostnames in these parameters. It requires
-seednode=X SOCKS5. In Tor mode, such addresses can also be exchanged with
other P2P nodes.
-connect=X When behind a Tor proxy, you can specify .onion addresses instead
-addnode=X of IP addresses or hostnames in these parameters. It requires
-seednode=X SOCKS5. In Tor mode, such addresses can also be exchanged with
other P2P nodes.
-onlynet=onion Make outgoing connections only to .onion addresses. Incoming
connections are not affected by this option. This option can be
specified multiple times to allow multiple network types, e.g.
ipv4, ipv6 or onion. If you use this option with values other
than onion you *cannot* disable onion connections; outgoing onion
connections will be enabled when you use -proxy or -onion. Use
-noonion or -onion=0 if you want to be sure there are no outbound
onion connections over the default proxy or your defined -proxy.
-onlynet=onion Make outgoing connections only to .onion addresses. Incoming
connections are not affected by this option. This option can be
specified multiple times to allow multiple network types, e.g.
ipv4, ipv6 or onion. If you use this option with values other
than onion you *cannot* disable onion connections; outgoing onion
connections will be enabled when you use -proxy or -onion. Use
-noonion or -onion=0 if you want to be sure there are no outbound
onion connections over the default proxy or your defined -proxy.
In a typical situation, this suffices to run behind a Tor proxy:
./bitcoind -proxy=127.0.0.1:9050
./bitcoind -proxy=127.0.0.1:9050
## 2. Automatically create a Bitcoin Core onion service
@@ -152,57 +152,57 @@ details).
You can also manually configure your node to be reachable from the Tor network.
Add these lines to your `/etc/tor/torrc` (or equivalent config file):
HiddenServiceDir /var/lib/tor/bitcoin-service/
HiddenServicePort 8333 127.0.0.1:8334
HiddenServiceDir /var/lib/tor/bitcoin-service/
HiddenServicePort 8333 127.0.0.1:8334
The directory can be different of course, but virtual port numbers should be equal to
your bitcoind's P2P listen port (8333 by default), and target addresses and ports
should be equal to binding address and port for inbound Tor connections (127.0.0.1:8334 by default).
-externalip=X You can tell bitcoin about its publicly reachable addresses using
this option, and this can be an onion address. Given the above
configuration, you can find your onion address in
/var/lib/tor/bitcoin-service/hostname. For connections
coming from unroutable addresses (such as 127.0.0.1, where the
Tor proxy typically runs), onion addresses are given
preference for your node to advertise itself with.
-externalip=X You can tell bitcoin about its publicly reachable addresses using
this option, and this can be an onion address. Given the above
configuration, you can find your onion address in
/var/lib/tor/bitcoin-service/hostname. For connections
coming from unroutable addresses (such as 127.0.0.1, where the
Tor proxy typically runs), onion addresses are given
preference for your node to advertise itself with.
You can set multiple local addresses with -externalip. The
one that will be rumoured to a particular peer is the most
compatible one and also using heuristics, e.g. the address
with the most incoming connections, etc.
You can set multiple local addresses with -externalip. The
one that will be rumoured to a particular peer is the most
compatible one and also using heuristics, e.g. the address
with the most incoming connections, etc.
-listen You'll need to enable listening for incoming connections, as this
is off by default behind a proxy.
-listen You'll need to enable listening for incoming connections, as this
is off by default behind a proxy.
-discover When -externalip is specified, no attempt is made to discover local
IPv4 or IPv6 addresses. If you want to run a dual stack, reachable
from both Tor and IPv4 (or IPv6), you'll need to either pass your
other addresses using -externalip, or explicitly enable -discover.
Note that both addresses of a dual-stack system may be easily
linkable using traffic analysis.
-discover When -externalip is specified, no attempt is made to discover local
IPv4 or IPv6 addresses. If you want to run a dual stack, reachable
from both Tor and IPv4 (or IPv6), you'll need to either pass your
other addresses using -externalip, or explicitly enable -discover.
Note that both addresses of a dual-stack system may be easily
linkable using traffic analysis.
In a typical situation, where you're only reachable via Tor, this should suffice:
./bitcoind -proxy=127.0.0.1:9050 -externalip=7zvj7a2imdgkdbg4f2dryd5rgtrn7upivr5eeij4cicjh65pooxeshid.onion -listen
./bitcoind -proxy=127.0.0.1:9050 -externalip=7zvj7a2imdgkdbg4f2dryd5rgtrn7upivr5eeij4cicjh65pooxeshid.onion -listen
(obviously, replace the .onion address with your own). It should be noted that you still
listen on all devices and another node could establish a clearnet connection, when knowing
your address. To mitigate this, additionally bind the address of your Tor proxy:
./bitcoind ... -bind=127.0.0.1
./bitcoind ... -bind=127.0.0.1
If you don't care too much about hiding your node, and want to be reachable on IPv4
as well, use `discover` instead:
./bitcoind ... -discover
./bitcoind ... -discover
and open port 8333 on your firewall (or use port mapping, i.e., `-upnp` or `-natpmp`).
If you only want to use Tor to reach .onion addresses, but not use it as a proxy
for normal IPv4/IPv6 communication, use:
./bitcoind -onion=127.0.0.1:9050 -externalip=7zvj7a2imdgkdbg4f2dryd5rgtrn7upivr5eeij4cicjh65pooxeshid.onion -discover
./bitcoind -onion=127.0.0.1:9050 -externalip=7zvj7a2imdgkdbg4f2dryd5rgtrn7upivr5eeij4cicjh65pooxeshid.onion -discover
## 4. Privacy recommendations