All IT4Innovations clusters are accessed by the SSH protocol via login nodes at the address **cluster-name.it4i.cz**. The login nodes may be addressed specifically, by prepending the loginX node name to the address.
!!! note "Workgroups Access Limitation"
Projects from the **PRACE** workgroup can only access the **Barbora** cluster.<br>Projects from the **EUROHPC** workgroup can only access the **Karolina** cluster.
Projects from the **EUROHPC** workgroup can only access the **Karolina** cluster.
!!! important "Karolina and Barbora updated security requirements"
Due to updated security requirements on Karolina and Barbora,