CAcert has a public Internet IPv4 address range and some of the Internet IP addresses are mapped to the infrastructure systems.
The infrastructure systems use IPv4 addresses from the
CAcert’s infrastructure systems are using a private network range that is
accessible from other CAcert systems. The Intranet IPv4 addresses are in the
The infrastructure host Infra02 has a local bridge interface br0 that is used to connect the containers on that machine and allows explicit routing as well as services that are purely internal and are not reachable from the Internet or Intranet machines in the IP range mentioned above.