diff --git a/easytier/src/common/log.rs b/easytier/src/common/log.rs
index a24af70a..2d0dc067 100644
--- a/easytier/src/common/log.rs
+++ b/easytier/src/common/log.rs
@@ -117,9 +117,9 @@ pub fn init(
     Ok(sender)
 }
 
-fn console_layers(
-    default_level: LevelFilter,
-) -> anyhow::Result<Vec<Box<dyn Layer<Registry> + Send + Sync>>> {
+type BoxLayer = Box<dyn Layer<Registry> + Send + Sync>;
+
+fn console_layers(default_level: LevelFilter) -> anyhow::Result<Vec<BoxLayer>> {
     let mut layers = Vec::new();
     if default_level == LevelFilter::OFF {
         return Ok(layers);
@@ -171,10 +171,7 @@ fn console_layers(
 fn file_layers(
     config: FileLoggerConfig,
     reload: bool,
-) -> anyhow::Result<(
-    Vec<Box<dyn Layer<Registry> + Send + Sync>>,
-    Option<NewFilterSender>,
-)> {
+) -> anyhow::Result<(Vec<BoxLayer>, Option<NewFilterSender>)> {
     let mut layers = Vec::new();
 
     let level = config
diff --git a/easytier/src/dns/node.rs b/easytier/src/dns/node.rs
index 48fdee68..e3f2e230 100644
--- a/easytier/src/dns/node.rs
+++ b/easytier/src/dns/node.rs
@@ -4,7 +4,7 @@ use crate::dns::peer_mgr::DnsPeerMgr;
 use crate::dns::server::DnsServer;
 use crate::peers::peer_manager::PeerManager;
 use crate::peers::NicPacketFilter;
-use crate::proto::dns::{DnsNodeMgrRpcClientFactory, DnsPeerMgrRpcServer, HeartbeatRequest};
+use crate::proto::dns::{DnsNodeMgrRpcClientFactory, HeartbeatRequest};
 use crate::proto::rpc_impl::standalone::{StandAloneClient, StandAloneServer};
 use crate::proto::rpc_types::controller::BaseController;
 use crate::tunnel::tcp::{TcpTunnelConnector, TcpTunnelListener};
diff --git a/easytier/src/dns/system/mod.rs b/easytier/src/dns/system/mod.rs
index 83d15363..0fe892b4 100644
--- a/easytier/src/dns/system/mod.rs
+++ b/easytier/src/dns/system/mod.rs
@@ -1,3 +1,4 @@
+#[allow(unused_imports)]
 use crate::utils::BoxExt;
 
 #[cfg(target_os = "linux")]