diff --git a/pmg-admin-guide.adoc b/pmg-admin-guide.adoc
index 51eb29f..1a408f6 100644
--- a/pmg-admin-guide.adoc
+++ b/pmg-admin-guide.adoc
@@ -60,6 +60,8 @@ include::pmg-smtp-filter.adoc[]
 
 include::pmgpolicy.adoc[]
 
+include::pmgtunnel.adoc[]
+
 :leveloffset: 0
 
 
@@ -132,6 +134,12 @@ include::pmg-smtp-filter.8-synopsis.adoc[]
 include::pmgpolicy.8-synopsis.adoc[]
 
 
+*pmgtunnel* - Cluster Tunnel Daemon
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+include::pmgtunnel.8-synopsis.adoc[]
+
+
 [appendix]
 include::pmg-rule-macros.adoc[]
 
diff --git a/pmgtunnel.adoc b/pmgtunnel.adoc
index 7a258e5..6847c69 100644
--- a/pmgtunnel.adoc
+++ b/pmgtunnel.adoc
@@ -23,7 +23,10 @@ pmgtunnel - Cluster Tunnel Daemon
 =================================
 endif::manvolnum[]
 
-TODO
+This daemon creates a ssh tunnel to the postgres database in other
+cluster nodes (port 5432). The tunnel is used to synchronize the
+database using an application specific asynchronous replication
+algorythm.
 
 ifdef::manvolnum[]
 include::pmg-copyright.adoc[]