Internal DNS

Dboxed sandboxes run a DNS server internally that performs two jobs.

The first job is to forward public DNS queries to the resolvers configured on the host.

The second job is to resolve Dboxed internal box hostnames.

Box domain names

Every box can resolve the IP of any other box from the same network by querying the A record of <box-name>.dboxed. The resolved IP depends on the network type and will usually resolve to an ip in the 100.64.0.0/10 CIDR , which is the CIDR used for P2P VPN networking in solutions like Netbird and Tailscale.

This means, if one box (named my-service) is exposing a http service on port 80, any other box in the same network can access the service via http://my-service.dboxed/my-path.