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.
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"
!!! 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"
!!! important "Karolina and Barbora updated security requirements"
Due to updated security requirements on Karolina and Barbora,
Due to updated security requirements on Karolina and Barbora,