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14_2_Changing_Your_Bitcoin_Hidden_Services.md
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# Chapter 12.2: Changing Your Bitcoin Hidden Services # Chapter 14.2: Changing Your Bitcoin Hidden Services
In this chapter we will show you how to create or change your local Bitcoin Hidden Service. To archieve this we need to add current user to tor or debian-tor group to guarantee that Bitcoin daemon can sets up an automatic hidden service on the first startup if it's correclty configured. Bitcoind will create a file called onion_private_key in the data directory. Further check if file control.authcookie exists like this: > :information_source: **NOTE:** This is a draft in progress, so that I can get some feedback from early reviewers. It is not yet ready for learning.
You've got a working Tor service, but if you want you can make changes to it.
## Reset Your `bitcoind` Onion Address
If you ever want to reset your onion address for `bitcoind`, just remove the `onion_private_key` in your data directory, such as `~/.bitcoin/testnet`:
``` ```
~$ ll /run/tor/control.authcookie $ rm onion_private_key
-rw-r----- 1 debian-tor debian-tor 32 jun 26 09:44 /run/tor/control.authcookie ```
Wehn you restart, a new onion address will be generated:
```
2020-07-22T23:52:27Z tor: Got service ID pyrtqyiqbwb3rhe7, advertising service pyrtqyiqbwb3rhe7.onion:18333
2020-07-22T23:52:27Z tor: Cached service private key to /home/standup/.bitcoin/testnet3/onion_private_key
``` ```
To avoid see a message like this in debug log file you need to add your current user to debian-tor group like this: ## Reset Your RPC Onion Address
debug.log
If you want to reset your onion address for RPC access, you similarly delete the `HiddenServiceDirectory` and restart Tor:
``` ```
2020-05-15T16:49:20Z tor: Authentication cookie /run/tor/control.authcookie could not be opened (check permissions) $ sudo rm -f /var/lib/tor/standup/
$ sudo /etc/init.d/tor restart
``` ```
``` > :warning: **WARNING:** Reseting your RPC onion address will disconnect any mobile wallets or other services that you've connected using the Quicklink API. Do this with extreme caution.
~$ sudo usermod -a -G debian-tor [CHANGE_MY_USER]
```
If you're running a older version Tor like 0.2.7 add this lines to /etc/tor/torrc file: ## Forcing `bitcoind` to Use Tor
Finally, you can force `bitcoind` to use onion by adding the following to your `bitcoin.conf`:
``` ```
HiddenServiceDir /var/lib/tor/bitcoin-service/ proxy=127.0.0.1:9050
HiddenServicePort 8333 127.0.0.1:8333 listen=1
HiddenServicePort 18333 127.0.0.1:18333 bind=127.0.0.1
onlynet=onion
``` ```
If you're running Tor version 3 bitcoind will configurate hidden services automatically to listen on. If you want to change your onion id delete file onion_private_key located in bitcoin data dir. You will then need to add onion-based seed nodes or other nodes to your setup, once more by editing the `bitcoin.conf`:
```
seednode=address.onion
seednode=address.onion
seednode=address.onion
seednode=address.onion
addnode=address.onion
addnode=address.onion
addnode=address.onion
addnode=address.onion
```
Afterward, restart `tor` and `bitcoind`
You should now be communicating exlusively on Tor. But, unless you are in a hostile state, this level of anonymity is probably not required. It also is not particularly recommended: you might greatly decrease your number of potential peers, inviting problems of censorship or even correlation. And, this setup may give you a false sense of anonymity that really doesn't exist on the Bitcoin network.
> :warning: **WARNING:** This setup is untested! Use at your own risk!
## Summary: Changing Your Bitcoin Hidden Services
You probably won't need to fool with your Onion services once you've investigated them but in case you do, here's how to reset a Tor address that has become compromised or to move over to exclusive-Tor use for your `bitcoind`.
## What's Next?
Continue "Understanding Tor" with [14.3: Adding SSH Hidden Services](14_3_Adding_SSH_Hidden_Services.md).