diff --git a/discovery/DiscoverHost.go b/discovery/DiscoverHost.go
index f3cd4cf..c09d228 100644
--- a/discovery/DiscoverHost.go
+++ b/discovery/DiscoverHost.go
@@ -1,14 +1,12 @@
 package discovery
 
 import (
-	"fmt"
-	"net"
-
-	"git.loafle.net/commons/util-go/net/cidr"
 	"git.loafle.net/overflow/model/meta"
 )
 
 type DiscoverHost struct {
+	DiscoveryConfig *DiscoveryConfig `json:"discoveryConfig,omitempty"`
+
 	MetaIPType *meta.MetaIPType `json:"metaIPType,omitempty"`
 
 	FirstScanRange string   `json:"firstScanRange,omitempty"`
@@ -18,50 +16,3 @@ type DiscoverHost struct {
 
 	DiscoverPort *DiscoverPort `json:"discoverPort,omitempty"`
 }
-
-func (dh *DiscoverHost) TargetHosts(network string) ([]net.IP, error) {
-	cr, err := cidr.NewCIDRRanger(network)
-	if nil != err {
-		return nil, err
-	}
-
-	var firstIP net.IP
-	if "" != dh.FirstScanRange {
-		firstIP = net.ParseIP(dh.FirstScanRange)
-		if nil == firstIP {
-			return nil, fmt.Errorf("IP(%v) of FirstScanRange host is not valid", firstIP)
-		}
-	}
-	var lastIP net.IP
-	if "" != dh.LastScanRange {
-		lastIP = net.ParseIP(dh.LastScanRange)
-		if nil == lastIP {
-			return nil, fmt.Errorf("IP(%v) of LastScanRange host is not valid", lastIP)
-		}
-	}
-
-	includeIPs := make([]net.IP, 0)
-	for _, iHost := range dh.IncludeHosts {
-		iIP := net.ParseIP(iHost)
-		if nil == iIP {
-			return nil, fmt.Errorf("IP(%v) of include host is not valid", iHost)
-		}
-		includeIPs = append(includeIPs, iIP)
-	}
-
-	excludeIPs := make([]net.IP, 0)
-	for _, eHost := range dh.ExcludeHosts {
-		eIP := net.ParseIP(eHost)
-		if nil == eIP {
-			return nil, fmt.Errorf("IP(%v) of exclude host is not valid", eHost)
-		}
-		excludeIPs = append(excludeIPs, eIP)
-	}
-
-	ranges, err := cr.Ranges(firstIP, lastIP, includeIPs, excludeIPs)
-	if nil != err {
-		return nil, err
-	}
-
-	return ranges, nil
-}
diff --git a/discovery/DiscoverPort.go b/discovery/DiscoverPort.go
index 8e7e37f..196f7d3 100644
--- a/discovery/DiscoverPort.go
+++ b/discovery/DiscoverPort.go
@@ -1,6 +1,8 @@
 package discovery
 
 type DiscoverPort struct {
+	DiscoveryConfig *DiscoveryConfig `json:"discoveryConfig,omitempty"`
+
 	FirstScanRange int   `json:"firstScanRange,omitempty"`
 	LastScanRange  int   `json:"lastScanRange,omitempty"`
 	ExcludePorts   []int `json:"excludePorts,omitempty"`
diff --git a/discovery/DiscoverService.go b/discovery/DiscoverService.go
index 5b32960..48088d9 100644
--- a/discovery/DiscoverService.go
+++ b/discovery/DiscoverService.go
@@ -1,5 +1,7 @@
 package discovery
 
 type DiscoverService struct {
+	DiscoveryConfig *DiscoveryConfig `json:"discoveryConfig,omitempty"`
+
 	IncludeServices []string `json:"includeServices,omitempty"`
 }
diff --git a/discovery/DiscoveryConfig.go b/discovery/DiscoveryConfig.go
index e24517b..f3dfa0c 100644
--- a/discovery/DiscoveryConfig.go
+++ b/discovery/DiscoveryConfig.go
@@ -5,5 +5,5 @@ import (
 )
 
 type DiscoveryConfig struct {
-	Credentials credential.CredentialMap `json:"credentials,omitempty"`
+	Credentials credential.CredentialsMap `json:"credentials,omitempty"`
 }