diff --git a/docs.it4i/general/shell-and-data-access.md b/docs.it4i/general/shell-and-data-access.md
index ad6a7a5788e5159b5c0308702deeeba9b2948f30..1706f602f4709e9f8c6448cb5f9a6f1cb3b31ff1 100644
--- a/docs.it4i/general/shell-and-data-access.md
+++ b/docs.it4i/general/shell-and-data-access.md
@@ -24,6 +24,12 @@ All IT4Innovations clusters are accessed by the SSH protocol via login nodes at
 | barbora.it4i.cz               | 22   | SSH      | round-robin DNS record for login{1,2} |
 | login{1,2}.barbora.it4i.cz    | 22   | SSH      | login{1,2}                            |
 
+### Complementary Systems
+
+| Login address                   | Port | Protocol | Login node                                |
+| ------------------------------- | ---- | -------- | ----------------------------------------- |
+| login.cs.it4i.cz                | 22   | SSH      | login                                     |
+
 ## Authentication
 
 Authentication is available by [private key][1] only. Verify SSH fingerprints during the first logon: