diff --git a/conf/frps_full.ini b/conf/frps_full.ini
index fecb8bf3..89ff8e72 100644
--- a/conf/frps_full.ini
+++ b/conf/frps_full.ini
@@ -54,6 +54,12 @@ log_level = info
 
 log_max_days = 3
 
+# log the duration of each connection for the connection type identified by its name
+# examples,
+#   'log_duration_types = ssh,rdp', it will log the duration for connection name has string 'ssh' or 'rdp'.
+#   'log_duration_types = all', it will log the duration for all connections.
+log_duration_types = ssh,rdp
+
 # disable log colors when log_file is console, default is false
 disable_log_color = false