diff --git a/build.sh b/build.sh
index d88d3c2..73b76d1 100755
--- a/build.sh
+++ b/build.sh
@@ -23,6 +23,7 @@ for module in $MODULES; do
 done
 final_modules="$(echo "$final_modules" | tr '\n' ' ')"
 echo "Final modules: $final_modules"
+
 cp -r modules_in_container modules
 cp -r user_modules_in_container user_modules
 
@@ -61,11 +62,28 @@ deal() {
     done
 }
 
+echo "Checking module existence..."
+for module in $final_modules; do
+    echo "$module"
+
+    if [ ! -d "modules/$module" ]; then
+        if [ ! -d "user_modules/$module" ]; then
+            echo "Module $module does not exist"
+            exit 1
+        fi
+    fi
+done
+
+
 deal modules
 deal user_modules
 
 echo "All packages: $all_packages"
 
+echo ""
+ls files -R
+echo ""
+
 make info
 cat ./repositories.conf
 if [ -z "$PROFILE" ]; then
diff --git a/modules/reject-netflix-ipv6/files/etc/dnsmasq.d/netflix.conf b/modules/reject-netflix-ipv6/files/etc/dnsmasq.d/netflix.conf
new file mode 100644
index 0000000..4a7f3e3
--- /dev/null
+++ b/modules/reject-netflix-ipv6/files/etc/dnsmasq.d/netflix.conf
@@ -0,0 +1,11 @@
+# 禁止奈飞解析IPV6地址
+server=/netflix.com/#
+address=/netflix.com/::
+server=/netflix.net/#
+address=/netflix.net/::
+server=/nflxext.com/#
+address=/nflxext.com/::
+server=/nflximg.net/#
+address=/nflximg.net/::
+server=/nflxvideo.net/#
+address=/nflxvideo.net/::
diff --git a/modules/reject-netflix-ipv6/files/etc/uci-defaults/99-reject-netflix-ipv6 b/modules/reject-netflix-ipv6/files/etc/uci-defaults/99-reject-netflix-ipv6
new file mode 100755
index 0000000..8a8f611
--- /dev/null
+++ b/modules/reject-netflix-ipv6/files/etc/uci-defaults/99-reject-netflix-ipv6
@@ -0,0 +1 @@
+echo "conf-dir=/etc/dnsmasq.d" >> /etc/dnsmasq.conf
\ No newline at end of file
diff --git a/modules/ssh-permission/files/etc/uci-defaults/99-ssh b/modules/ssh-permission/files/etc/uci-defaults/99-ssh
new file mode 100755
index 0000000..22fed16
--- /dev/null
+++ b/modules/ssh-permission/files/etc/uci-defaults/99-ssh
@@ -0,0 +1,3 @@
+if [ -f /etc/dropbear/authorized_key ]; then
+    chmod 644 /etc/dropbear/authorized_keys
+fi
\ No newline at end of file