diff --git a/infrastructure-guide/login.md b/infrastructure-guide/login.md
index 15f16feb..989c755b 100644
--- a/infrastructure-guide/login.md
+++ b/infrastructure-guide/login.md
@@ -3,3 +3,10 @@
 This is a  cluster made up of 3 hosts, which all are VMs running on the AIT vmware cluster. These machines are pretty standard RHEL7 hosts managed by Puppet: https://git.psi.ch/linux-infra/data-pli/blob/master/login.yaml.
 
 Info for users is published at https://intranet.psi.ch/de/computing/linux-login-clusters
+
+
+This is the definition who can access the loginXX nodes:
+
+* All PSI employees (unx-lx_users)
+* Everybody that can access RA, MEG, Merlin (svc-cluster_merlin6, svc-cluster_meg and svc-cluster_ra)
+* External users that are part of the group unx-lx_login_ext
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