The HBP Supercomputers at BSC, CINECA, ETHZ-CSCS and JUELICH are connected via the trusted PRACE VPN network. All supercomputing sites, the HBP Cloud Storage at KIT and the HBP High Fidelity Visualisation Systems at RWTH and EPFL are connected via the public Internet. In addition, there are dedicated high-speed connections between JUELICH and RWTH, and between CSCS and EPFL, which are available to the HBP.