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Networking Reinvented

Cjdns implements an encrypted IPv6 network using public-key cryptography for address allocation and a distributed hash table for routing. This provides near-zero-configuration networking, and prevents many of the security and scalability issues that plague existing networks.


The key part of cjdns is the cjdroute background daemon. To start cjdroute:

systemctl start cjdns

This will generate /etc/cjdroute.conf pre-populated with random keys and passwords. At first startup, cjdroute looks for neighboring cjdns peers on all active network interfaces using a layer 2 (e.g. ethernet) protocol. This is exactly what you want if you are on a wifi mesh. If you only have a conventional "clearnet" ISP, see the upstream README for instructions on adding peers using the UDP protocol. (Search for "Find a friend".)

After adding peers to /etc/cjdroute.conf, restart cjdroute with:

systemctl restart cjdns

To have cjdroute start whenever you boot, use

systemctl enable cjdns

If you are on a laptop and suspend or hibernate it, cjdroute will take a few minutes to make coffee and figure out what just happened when it wakes up. You can speed this up dramatically with:

systemctl enable cjdns-resume

The resume service restarts cjdns when the system wakes up from sleep.