Network & Security
This page describes how Anunna is connected and how access to it is secured.
Network
Internally inside the cluster, the compute nodes and the Lustre filesystem are linked by a high-speed, low-latency interconnect, which is what lets the parallel filesystem and multi-node jobs perform well.
From outside, the cluster services are reached through two loadbalancers, which are connected to the internet over 100Gbit links.
SSH to access login.anunna.wur.nl, other services can be reached through their respective URLs. Access to some services are restricted to certain IP ranges, and are thus are only reachable over the WUR VPN or from within WURNET. See Log in to Anunna for how to connect.
Authentication
You log in with your WUR or outside group account. For stronger protection you can add multi-factor authentication to your SSH access using a hardware security key — see Using a hardware key for better security. You can also configure key-based login so you are not prompted for a password each time; see Ssh without password.
If you use the wrong credentials, your access will be blocked.
Data security
For how file and folder permissions work on the cluster, see Shared folders. For storing confidential data, contact the HPC team via Support.