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doc: update cjdns.md for current upstream changes

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@@ -10,8 +10,8 @@ CJDNS is like a distributed, shared VPN with multiple entry points where every
participant can reach any other participant. All participants use addresses from participant can reach any other participant. All participants use addresses from
the `fc00::/8` network (reserved IPv6 range). Installation and configuration is the `fc00::/8` network (reserved IPv6 range). Installation and configuration is
done outside of Bitcoin Core, similarly to a VPN (either in the host/OS or on done outside of Bitcoin Core, similarly to a VPN (either in the host/OS or on
the network router). See https://github.com/cjdelisle/cjdns#readme and the network router). See https://github.com/cjdelisle/cjdns#readme for more
https://github.com/hyperboria/docs#hyperboriadocs for more information. information.
Compared to IPv4/IPv6, CJDNS provides end-to-end encryption and protects nodes Compared to IPv4/IPv6, CJDNS provides end-to-end encryption and protects nodes
from traffic analysis and filtering. from traffic analysis and filtering.
@@ -24,46 +24,25 @@ somewhat centralized. I2P connections have a source address and I2P is slow.
CJDNS is fast but does not hide the sender and the recipient from intermediate CJDNS is fast but does not hide the sender and the recipient from intermediate
routers. routers.
## Installing CJDNS and finding a peer to connect to the network ## Installing CJDNS
To install and set up CJDNS, follow the instructions at To install and set up CJDNS, follow the instructions at
https://github.com/cjdelisle/cjdns#how-to-install-cjdns. https://github.com/cjdelisle/cjdns#how-to-install-cjdns.
You need to initiate an outbound connection to a peer on the CJDNS network ## Connecting to the CJDNS network
before it will work with your Bitcoin Core node. This is described in steps
["2. Find a friend"](https://github.com/cjdelisle/cjdns#2-find-a-friend) and
["3. Connect your node to your friend's
node"](https://github.com/cjdelisle/cjdns#3-connect-your-node-to-your-friends-node)
in the CJDNS documentation.
One quick way to accomplish these two steps is to query for available public As of CJDNS v22, nodes automatically discover and connect to peers via DNS
peers on [Hyperboria](https://github.com/hyperboria) by running the following: seeding. After installation, you can verify that your node has peers:
``` cjdnstool peers show
git clone https://github.com/hyperboria/peers hyperboria-peers
cd hyperboria-peers
./testAvailable.py
```
For each peer, the `./testAvailable.py` script prints the filename of the peer's If you see peers with status `ESTABLISHED`, your node is connected and no
credentials followed by the ping result. further peering setup is needed.
Choose one or several peers, copy their credentials from their respective files, Manual peering may be useful if you want to guarantee a connection to a
paste them into the relevant IPv4 or IPv6 "connectTo" JSON object in the specific node, or if you have disabled DNS seeding for privacy reasons. See
`cjdroute.conf` file you created in step ["1. Generate a new configuration [doc/peering.md](https://github.com/cjdelisle/cjdns/blob/master/doc/peering.md)
file"](https://github.com/cjdelisle/cjdns#1-generate-a-new-configuration-file), in the CJDNS repository for details.
and save the file.
## Launching CJDNS
Typically, CJDNS might be launched from its directory with
`sudo ./cjdroute < cjdroute.conf` and it sheds permissions after setting up the
[TUN](https://en.wikipedia.org/wiki/TUN/TAP) interface. You may also [launch it as an
unprivileged user](https://github.com/cjdelisle/cjdns/blob/master/doc/non-root-user.md)
with some additional setup.
The network connection can be checked by running `./tools/peerStats` from the
CJDNS directory.
## Run Bitcoin Core with CJDNS ## Run Bitcoin Core with CJDNS