diff --git a/easytier/src/common/config.rs b/easytier/src/common/config.rs
index 405fdc91..8df84eb3 100644
--- a/easytier/src/common/config.rs
+++ b/easytier/src/common/config.rs
@@ -22,6 +22,7 @@ use crate::{
         common::{CompressionAlgoPb, PortForwardConfigPb, SecureModeConfig, SocketType},
     },
     tunnel::generate_digest_from_str,
+    utils,
 };
 
 pub type Flags = crate::proto::common::FlagsInConfig;
@@ -580,14 +581,7 @@ impl ConfigLoader for TomlConfigLoader {
             .filter(|h| !h.is_empty());
 
         self.set_hostname(hostname.clone());
-        hostname.unwrap_or_else(|| {
-            sanitize(
-                hostname::get()
-                    .unwrap_or_else(|_| "localhost".into())
-                    .to_string_lossy()
-                    .as_ref(),
-            )
-        })
+        hostname.unwrap_or_else(|| sanitize(utils::hostname()))
     }
 
     fn set_hostname(&self, name: Option<String>) {
diff --git a/easytier/src/utils/mod.rs b/easytier/src/utils/mod.rs
index 0b2a6ad9..1e227b59 100644
--- a/easytier/src/utils/mod.rs
+++ b/easytier/src/utils/mod.rs
@@ -23,6 +23,13 @@ pub fn weak_upgrade<T>(weak: &Weak<T>) -> anyhow::Result<Arc<T>> {
         .ok_or_else(|| anyhow::anyhow!("{} not available", std::any::type_name::<T>()))
 }
 
+pub fn hostname() -> String {
+    hostname::get()
+        .unwrap_or_else(|_| "localhost".into())
+        .to_string_lossy()
+        .into_owned()
+}
+
 pub trait BoxExt: Sized {
     fn boxed(self) -> Box<Self> {
         Box::new(self)
diff --git a/easytier/src/web_client/mod.rs b/easytier/src/web_client/mod.rs
index 5a61aaa7..fb50ab43 100644
--- a/easytier/src/web_client/mod.rs
+++ b/easytier/src/web_client/mod.rs
@@ -9,6 +9,7 @@ use crate::{
     instance_manager::{DaemonGuard, NetworkInstanceManager},
     proto::common::NatType,
     tunnel::{IpVersion, TunnelConnector},
+    utils,
 };
 use anyhow::{Context as _, Result};
 use async_trait::async_trait;
@@ -225,12 +226,7 @@ pub async fn run_web_client(
     let mut flags = global_ctx.get_flags();
     flags.bind_device = false;
     global_ctx.set_flags(flags);
-    let hostname = hostname.unwrap_or_else(|| {
-        hostname::get()
-            .unwrap_or_else(|_| "localhost".into())
-            .to_string_lossy()
-            .into_owned()
-    });
+    let hostname = hostname.unwrap_or_else(utils::hostname);
     Ok(WebClient::new(
         create_connector_by_url(c_url.as_str(), &global_ctx, IpVersion::Both).await?,
         token.to_string(),