diff --git a/easytier/src/proto/mod.rs b/easytier/src/proto/mod.rs
index 63363c3f..02d69bd6 100644
--- a/easytier/src/proto/mod.rs
+++ b/easytier/src/proto/mod.rs
@@ -14,6 +14,7 @@ pub mod web;
 
 #[cfg(test)]
 pub mod tests;
+pub mod utils;
 
 const DESCRIPTOR_POOL_BYTES: &[u8] =
     include_bytes!(concat!(env!("OUT_DIR"), "/file_descriptor_set.bin"));
diff --git a/easytier/src/proto/utils.rs b/easytier/src/proto/utils.rs
new file mode 100644
index 00000000..80fde761
--- /dev/null
+++ b/easytier/src/proto/utils.rs
@@ -0,0 +1,49 @@
+use derive_more::{Deref, DerefMut, From, IntoIterator};
+use itertools::Itertools;
+use serde::{Deserialize, Serialize};
+use crate::dns::utils::MapTryInto;
+
+pub trait MessageModel<Message: prost::Message>: Into<Message> + for<'m> TryFrom<&'m Message> {}
+
+impl<Message, Model> MessageModel<Message> for Model
+where
+    Message: prost::Message,
+    Model: Into<Message> + for<'m> TryFrom<&'m Message>,
+{
+}
+
+#[derive(
+    Debug, Clone, PartialEq, Eq, Hash, From, Deref, DerefMut, Serialize, Deserialize, IntoIterator,
+)]
+#[serde(transparent)]
+#[into_iterator(owned, ref, ref_mut)]
+pub struct RepeatedMessageModel<Model>(Vec<Model>);
+
+impl<Model> Default for RepeatedMessageModel<Model>
+{
+    fn default() -> Self {
+        Self(vec![])
+    }
+}
+
+impl<'m, Message, Model> TryFrom<&'m Vec<Message>> for RepeatedMessageModel<Model>
+where
+    Message: prost::Message,
+    Model: MessageModel<Message>,
+{
+    type Error = <Model as TryFrom<&'m Message>>::Error;
+
+    fn try_from(value: &'m Vec<Message>) -> Result<Self, Self::Error> {
+        Ok(Self(value.map_try_into().collect::<Result<Vec<_>, _>>()?))
+    }
+}
+
+impl<Message, Model> From<RepeatedMessageModel<Model>> for Vec<Message>
+where
+    Message: prost::Message,
+    Model: MessageModel<Message>,
+{
+    fn from(value: RepeatedMessageModel<Model>) -> Self {
+        value.into_iter().map_into().collect()
+    }
+}