diff --git a/config/config_defaults.go b/config/config_defaults.go
index 6736c7093..55d9faf70 100644
--- a/config/config_defaults.go
+++ b/config/config_defaults.go
@@ -272,6 +272,8 @@ const CGRATES_CFG_JSON = `
 	"min_call_duration": "0s",				// only authorize calls with allowed duration higher than this
 	"max_call_duration": "3h",				// maximum call duration a prepaid call can last
 	"session_ttl": "0s",					// time after a session with no updates is terminated, not defined by default
+	//"min_session_ttl": "",				// activates session_ttl randomization as minimum possible session_ttl
+	//"max_session_ttl": "",				// used in case of session_ttl randomization as maximum possible session_ttl, unlimited if not defined
 	//"session_ttl_last_used": "",			// tweak LastUsed for sessions timing-out, not defined by default
 	//"session_ttl_usage": "",				// tweak Usage for sessions timing-out, not defined by default
 	"session_indexes": [],					// index sessions based on these fields for GetActiveSessions API
diff --git a/config/libconfig_json.go b/config/libconfig_json.go
index 9800f1918..f6eb8017f 100644
--- a/config/libconfig_json.go
+++ b/config/libconfig_json.go
@@ -196,6 +196,8 @@ type SmGenericJsonCfg struct {
 	Min_call_duration     *string
 	Max_call_duration     *string
 	Session_ttl           *string
+	Min_session_ttl       *string
+	Max_session_ttl       *string
 	Session_ttl_last_used *string
 	Session_ttl_usage     *string
 	Session_indexes       *[]string
diff --git a/config/smconfig.go b/config/smconfig.go
index 21e874cee..19c13db63 100644
--- a/config/smconfig.go
+++ b/config/smconfig.go
@@ -97,6 +97,8 @@ type SmGenericConfig struct {
 	MinCallDuration     time.Duration
 	MaxCallDuration     time.Duration
 	SessionTTL          time.Duration
+	MinSessionTTL       *time.Duration
+	MaxSessionTTL       *time.Duration
 	SessionTTLLastUsed  *time.Duration
 	SessionTTLUsage     *time.Duration
 	SessionIndexes      utils.StringMap
@@ -154,6 +156,20 @@ func (self *SmGenericConfig) loadFromJsonCfg(jsnCfg *SmGenericJsonCfg) error {
 			return err
 		}
 	}
+	if jsnCfg.Min_session_ttl != nil {
+		if minSesTTL, err := utils.ParseDurationWithSecs(*jsnCfg.Min_session_ttl); err != nil {
+			return err
+		} else {
+			self.MinSessionTTL = &minSesTTL
+		}
+	}
+	if jsnCfg.Max_session_ttl != nil {
+		if maxSesTTL, err := utils.ParseDurationWithSecs(*jsnCfg.Max_session_ttl); err != nil {
+			return err
+		} else {
+			self.MaxSessionTTL = &maxSesTTL
+		}
+	}
 	if jsnCfg.Session_ttl_last_used != nil {
 		if sessionTTLLastUsed, err := utils.ParseDurationWithSecs(*jsnCfg.Session_ttl_last_used); err != nil {
 			return err