diff --git a/backend/app/service/firewall.go b/backend/app/service/firewall.go
index 06363464a..62a6fd585 100644
--- a/backend/app/service/firewall.go
+++ b/backend/app/service/firewall.go
@@ -190,6 +190,7 @@ func (u *FirewallService) OperatePortRule(req dto.PortRuleOperate, reload bool)
 		return nil
 	}
 
+	itemPorts := req.Port
 	for _, proto := range protos {
 		if strings.Contains(req.Port, "-") {
 			req.Protocol = proto
@@ -197,7 +198,7 @@ func (u *FirewallService) OperatePortRule(req dto.PortRuleOperate, reload bool)
 				return err
 			}
 		} else {
-			ports := strings.Split(req.Port, ",")
+			ports := strings.Split(itemPorts, ",")
 			for _, port := range ports {
 				if len(port) == 0 {
 					continue