diff --git a/openwrt/package/arptables/Makefile b/openwrt/package/arptables/Makefile
index f27a35333..baa2dc300 100644
--- a/openwrt/package/arptables/Makefile
+++ b/openwrt/package/arptables/Makefile
@@ -8,6 +8,7 @@ include $(TOPDIR)/rules.mk
 PKG_NAME:=arptables
 PKG_VERSION:=0.0.3
 PKG_RELEASE:=1
+PKG_MD5SUM:=1672244603c8979577aa4738be35a759
 PKG_SOURCE_URL:=@SF/ebtables
 PKG_SOURCE:=$(PKG_NAME)-v$(PKG_VERSION).tar.gz
 PKG_BUILD_DIR:=$(BUILD_DIR)/$(PKG_NAME)-v$(PKG_VERSION)
@@ -16,7 +17,7 @@ PKG_IPK:=$(PACKAGE_DIR)/$(PKG_NAME)_$(PKG_VERSION)-$(PKG_RELEASE)_$(ARCH).ipk
 PKG_IPK_DIR:=$(PKG_BUILD_DIR)/ipkg
 
 $(DL_DIR)/$(PKG_SOURCE):
-	 $(SCRIPT_DIR)/download.pl $(DL_DIR) $(PKG_SOURCE) x $(PKG_SOURCE_URL)
+	 $(SCRIPT_DIR)/download.pl $(DL_DIR) $(PKG_SOURCE) $(PKG_MD5SUM) $(PKG_SOURCE_URL)
 
 $(PKG_BUILD_DIR)/.unpacked: $(DL_DIR)/$(PKG_SOURCE)
 	$(PKG_CAT) $(DL_DIR)/$(PKG_SOURCE) | tar -C $(BUILD_DIR) $(TAR_OPTIONS) -
diff --git a/openwrt/package/bridge/Makefile b/openwrt/package/bridge/Makefile
index 5aba7d30e..f19a199c8 100644
--- a/openwrt/package/bridge/Makefile
+++ b/openwrt/package/bridge/Makefile
@@ -8,6 +8,7 @@ include $(TOPDIR)/rules.mk
 PKG_NAME:=bridge
 PKG_VERSION:=1.0.4
 PKG_RELEASE:=1
+PKG_MD5SUM:=2cab42847c4654e58c4d0ba114bfe2c2
 PKG_SOURCE_URL:=@SF/bridge
 PKG_SOURCE:=bridge-utils-$(PKG_VERSION).tar.gz
 PKG_BUILD_DIR:=$(BUILD_DIR)/bridge-utils-$(PKG_VERSION)
@@ -16,7 +17,7 @@ PKG_IPK:=$(PACKAGE_DIR)/$(PKG_NAME)_$(PKG_VERSION)-$(PKG_RELEASE)_$(ARCH).ipk
 PKG_IPK_DIR:=$(PKG_BUILD_DIR)/ipkg
 
 $(DL_DIR)/$(PKG_SOURCE):
-	 $(SCRIPT_DIR)/download.pl $(DL_DIR) $(PKG_SOURCE) x $(PKG_SOURCE_URL)
+	 $(SCRIPT_DIR)/download.pl $(DL_DIR) $(PKG_SOURCE) $(PKG_MD5SUM) $(PKG_SOURCE_URL)
 
 $(PKG_BUILD_DIR)/.unpacked: $(DL_DIR)/$(PKG_SOURCE)
 	$(PKG_CAT) $(DL_DIR)/$(PKG_SOURCE) | tar -C $(BUILD_DIR) $(TAR_OPTIONS) -
diff --git a/openwrt/package/ebtables/Makefile b/openwrt/package/ebtables/Makefile
index f79f6864c..6df16dd77 100644
--- a/openwrt/package/ebtables/Makefile
+++ b/openwrt/package/ebtables/Makefile
@@ -8,6 +8,7 @@ include $(TOPDIR)/rules.mk
 PKG_NAME:=ebtables
 PKG_VERSION:=2.0.6
 PKG_RELEASE:=1
+PKG_MD5SUM:=c4559af2366c764c6c42a3fdd40d60d3
 PKG_SOURCE_URL:=@SF/ebtables
 PKG_SOURCE:=$(PKG_NAME)-v$(PKG_VERSION).tar.gz
 PKG_BUILD_DIR:=$(BUILD_DIR)/ebtables-v$(PKG_VERSION)
@@ -16,7 +17,7 @@ PKG_IPK:=$(PACKAGE_DIR)/$(PKG_NAME)_$(PKG_VERSION)-$(PKG_RELEASE)_$(ARCH).ipk
 PKG_IPK_DIR:=$(PKG_BUILD_DIR)/ipkg
 
 $(DL_DIR)/$(PKG_SOURCE):
-	 $(SCRIPT_DIR)/download.pl $(DL_DIR) $(PKG_SOURCE) x $(PKG_SOURCE_URL)
+	 $(SCRIPT_DIR)/download.pl $(DL_DIR) $(PKG_SOURCE) $(PKG_MD5SUM) $(PKG_SOURCE_URL)
 
 $(PKG_BUILD_DIR)/.unpacked: $(DL_DIR)/$(PKG_SOURCE)
 	$(PKG_CAT) $(DL_DIR)/$(PKG_SOURCE) | tar -C $(BUILD_DIR) $(TAR_OPTIONS) -