diff --git a/agents/agentreq.go b/agents/agentreq.go
index a48a4416c..718c7df3b 100644
--- a/agents/agentreq.go
+++ b/agents/agentreq.go
@@ -127,6 +127,9 @@ func (ar *AgentRequest) AsNavigableMap(tplFlds []*config.CfgCdrField) (
 		}
 		valSet = append(valSet, &engine.NMItem{Data: out, Path: fldPath, Config: tplFld})
 		nM.Set(fldPath, valSet, true)
+		if tplFld.Blocker { // useful in case of processing errors first
+			break
+		}
 	}
 	return
 }
diff --git a/agents/httpagent_it_test.go b/agents/httpagent_it_test.go
index 8f4a0aea6..dcbdb86e8 100644
--- a/agents/httpagent_it_test.go
+++ b/agents/httpagent_it_test.go
@@ -27,6 +27,7 @@ import (
 	"net/rpc"
 	"net/rpc/jsonrpc"
 	"path"
+	"reflect"
 	"testing"
 	"time"
 
@@ -69,14 +70,12 @@ func TestHAitResetStorDb(t *testing.T) {
 	}
 }
 
-/*
 // Start CGR Engine
 func TestHAitStartEngine(t *testing.T) {
 	if _, err := engine.StopStartEngine(haCfgPath, *waitRater); err != nil {
 		t.Fatal(err)
 	}
 }
-*/
 
 // Connect rpc client to rater
 func TestHAitApierRpcConn(t *testing.T) {
@@ -97,17 +96,22 @@ func TestHAitTPFromFolder(t *testing.T) {
 	time.Sleep(time.Duration(*waitRater) * time.Millisecond) // Give time for scheduler to execute topups
 }
 
-func TestHAitAuth(t *testing.T) {
+func TestHAitAuthDryRun(t *testing.T) {
 	reqUrl := fmt.Sprintf("http://%s%s?request_type=OutboundAUTH&CallID=123456&Msisdn=497700056231&Imsi=2343000000000123&Destination=491239440004&MSRN=0102220233444488999&ProfileID=1&AgentID=176&GlobalMSISDN=497700056129&GlobalIMSI=214180000175129&ICCID=8923418450000089629&MCC=234&MNC=10&calltype=callback",
 		haCfg.HTTPListen, haCfg.HttpAgentCfg()[0].Url)
 	rply, err := httpC.Get(reqUrl)
 	if err != nil {
 		t.Error(err)
 	}
+	eXml := []byte(`<?xml version="1.0" encoding="UTF-8"?>
+<response>
+  <Allow>1</Allow>
+  <MaxDuration>1200</MaxDuration>
+</response>`)
 	if body, err := ioutil.ReadAll(rply.Body); err != nil {
 		t.Error(err)
-	} else {
-		fmt.Printf("Got reply: %s\n", string(body))
+	} else if !reflect.DeepEqual(eXml, body) {
+		t.Errorf("expecting: %s, received: %s", string(eXml), string(body))
 	}
 	rply.Body.Close()
 }
diff --git a/config/cfgcdrfield.go b/config/cfgcdrfield.go
index 50158a6bd..d3a636c83 100644
--- a/config/cfgcdrfield.go
+++ b/config/cfgcdrfield.go
@@ -95,6 +95,9 @@ func NewCfgCdrFieldFromCdrFieldJsonCfg(jsnCfgFld *CdrFieldJsonCfg) (*CfgCdrField
 	if jsnCfgFld.New_branch != nil {
 		cfgFld.NewBranch = *jsnCfgFld.New_branch
 	}
+	if jsnCfgFld.Blocker != nil {
+		cfgFld.Blocker = *jsnCfgFld.Blocker
+	}
 	return cfgFld, nil
 }
 
@@ -120,6 +123,7 @@ type CfgCdrField struct {
 	MaskLen          int
 	BreakOnSuccess   bool
 	NewBranch        bool
+	Blocker          bool
 }
 
 func CfgCdrFieldsFromCdrFieldsJsonCfg(jsnCfgFldss []*CdrFieldJsonCfg) ([]*CfgCdrField, error) {
diff --git a/config/libconfig_json.go b/config/libconfig_json.go
index 6927e0ac7..d3bcd1096 100755
--- a/config/libconfig_json.go
+++ b/config/libconfig_json.go
@@ -164,6 +164,7 @@ type CdrFieldJsonCfg struct {
 	Mask_length          *int
 	Break_on_success     *bool
 	New_branch           *bool
+	Blocker              *bool
 }
 
 // Cdre config section
diff --git a/data/conf/samples/httpagent/httpagent.json b/data/conf/samples/httpagent/httpagent.json
index cfc8e314d..dd706ec96 100644
--- a/data/conf/samples/httpagent/httpagent.json
+++ b/data/conf/samples/httpagent/httpagent.json
@@ -13,6 +13,22 @@
 		"request_payload":	"*url",
 		"reply_payload":	"*xml",
 		"request_processors": [
+			{
+				"id": "OutboundAUTHDryRun",
+				"filters": ["*string:*request.request_type:OutboundAUTH","*string:*request.Msisdn:497700056231"],
+				"flags": ["*dryrun"],
+				"continue_on_success": false,
+				"request_fields":[
+				],
+				"reply_fields":[
+					{"tag": "Allow", "field_id": "response.Allow", "type": "*constant", 
+						"value": "1", "mandatory": true},
+					{"tag": "MaxDuration", "field_id": "response.MaxDuration", "type": "*constant", 
+						"value": "1200", "blocker": true},
+					{"tag": "NotUsed", "field_id": "response.NotUnused", "type": "*constant", 
+						"value": "0"},
+				],
+			},
 			{
 				"id": "OutboundAUTH",
 				"filters": ["*string:*request.request_type:OutboundAUTH"],
@@ -33,10 +49,8 @@
 				"reply_fields":[
 					{"tag": "Allow", "field_id": "response.Allow", "type": "*constant", 
 						"value": "1", "mandatory": true},
-					//{"tag": "MaxDuration", "field_id": "response.MaxDuration", "type": "*composed", 
-					//	"value": "*cgrReply.MaxUsage{*duration_seconds}", "mandatory": true},
-					{"tag": "MaxDuration", "field_id": "response.MaxDuration", "type": "*constant", 
-						"value": "1200", "mandatory": true},
+					{"tag": "MaxDuration", "field_id": "response.MaxDuration", "type": "*composed", 
+						"value": "*cgrReply.MaxUsage{*duration_seconds}", "mandatory": true},
 				],
 			},
 			{