diff --git a/pkg/cloudcommon/db/namevalidator.go b/pkg/cloudcommon/db/namevalidator.go
index 97a41c31a6..bf28ebc41e 100644
--- a/pkg/cloudcommon/db/namevalidator.go
+++ b/pkg/cloudcommon/db/namevalidator.go
@@ -115,7 +115,7 @@ func GenerateName2(manager IModelManager, ownerId mcclient.IIdentityProvider, hi
 }
 
 var (
-	dnsNameREG = regexp.MustCompile(`^[a-zA-Z][a-zA-Z0-9-]*$`)
+	dnsNameREG = regexp.MustCompile(`^[a-z][a-z0-9-]*$`)
 )
 
 type SDnsNameValidatorManager struct{}
diff --git a/pkg/compute/models/guests.go b/pkg/compute/models/guests.go
index cfc8f7e3d8..04b13c4ba8 100644
--- a/pkg/compute/models/guests.go
+++ b/pkg/compute/models/guests.go
@@ -69,7 +69,6 @@ type SGuestManager struct {
 	db.SVirtualResourceBaseManager
 	db.SExternalizedResourceBaseManager
 	SDeletePreventableResourceBaseManager
-	db.SDnsNameValidatorManager
 
 	SHostResourceBaseManager
 	SBillingResourceBaseManager
@@ -5226,3 +5225,14 @@ func (guest *SGuest) GetUsages() []db.IUsage {
 		&regionUsage,
 	}
 }
+
+var (
+	serverNameREG = regexp.MustCompile(`^[a-z$][a-z0-9-${}.]*$`)
+)
+
+func (manager *SGuestManager) ValidateName(name string) error {
+	if serverNameREG.MatchString(name) {
+		return nil
+	}
+	return httperrors.NewInputParameterError("name starts with letter, and contains letter, number and - only")
+}