diff --git a/easytier/src/common/config.rs b/easytier/src/common/config.rs
index 92ea475..7201172 100644
--- a/easytier/src/common/config.rs
+++ b/easytier/src/common/config.rs
@@ -194,6 +194,7 @@ impl TomlConfigLoader {
                 config_str, config_str
             )
         })?;
+
         Ok(TomlConfigLoader {
             config: Arc::new(Mutex::new(config)),
         })
@@ -221,12 +222,24 @@ impl ConfigLoader for TomlConfigLoader {
     }
 
     fn get_hostname(&self) -> String {
-        self.config
-            .lock()
-            .unwrap()
-            .hostname
-            .clone()
-            .unwrap_or(gethostname::gethostname().to_string_lossy().to_string())
+        let hostname = self.config.lock().unwrap().hostname.clone();
+
+        match hostname {
+            Some(hostname) => {
+                let re = regex::Regex::new(r"[^\u4E00-\u9FA5a-zA-Z0-9\-]*").unwrap();
+                let mut name = re.replace_all(&hostname, "").to_string();
+
+                if name.len() > 32 {
+                    name = name.chars().take(32).collect::<String>();
+                }
+
+                if hostname != name {
+                    self.set_hostname(Some(name.clone()));
+                }
+                name
+            }
+            None => gethostname::gethostname().to_string_lossy().to_string(),
+        }
     }
 
     fn set_hostname(&self, name: Option<String>) {
diff --git a/easytier/src/common/global_ctx.rs b/easytier/src/common/global_ctx.rs
index 969988c..d574311 100644
--- a/easytier/src/common/global_ctx.rs
+++ b/easytier/src/common/global_ctx.rs
@@ -54,7 +54,7 @@ pub struct GlobalCtx {
 
     ip_collector: Arc<IPCollector>,
 
-    hostname: AtomicCell<Option<String>>,
+    hostname: String,
 
     stun_info_collection: Box<dyn StunInfoCollectorTrait>,
 
@@ -97,7 +97,7 @@ impl GlobalCtx {
 
             ip_collector: Arc::new(IPCollector::new(net_ns)),
 
-            hostname: AtomicCell::new(Some(hostname)),
+            hostname,
 
             stun_info_collection: Box::new(StunInfoCollector::new_with_default_servers()),
 
@@ -166,29 +166,8 @@ impl GlobalCtx {
         self.ip_collector.clone()
     }
 
-    pub fn get_hostname(&self) -> Option<String> {
-        let hostname = gethostname::gethostname().to_string_lossy().to_string();
-
-        let hostname = match self.hostname.take() {
-            Some(name) => {
-                // when allowing custom hostname, there may be empty
-                if name.is_empty() {
-                    hostname
-                } else {
-                    name
-                }
-            },
-            None => hostname,
-        };
-
-        let re = regex::Regex::new(r"[^\u4E00-\u9FA5a-zA-Z0-9\-]*").unwrap();
-        let mut hostname = re.replace_all(&hostname, "").to_string();
-        if hostname.len() > 32 {
-            hostname = hostname.chars().take(32).collect::<String>();
-        }
-
-        self.hostname.store(Some(hostname.clone()));
-        return Some(hostname);
+    pub fn get_hostname(&self) -> String {
+        return self.hostname.clone();
     }
 
     pub fn get_stun_info_collector(&self) -> impl StunInfoCollectorTrait + '_ {
diff --git a/easytier/src/easytier-core.rs b/easytier/src/easytier-core.rs
index ec67338..3860664 100644
--- a/easytier/src/easytier-core.rs
+++ b/easytier/src/easytier-core.rs
@@ -181,24 +181,7 @@ impl From<Cli> for TomlConfigLoader {
 
         cfg.set_inst_name(cli.instance_name.clone());
 
-        let hostname = gethostname::gethostname().to_string_lossy().to_string();
-        let hostname = match cli.hostname {
-            Some(name) => {
-                // when allowing custom hostname, there may be empty
-                if name.is_empty() {
-                    hostname
-                } else {
-                    name
-                }
-            }
-            None => hostname,
-        };
-        let re = regex::Regex::new(r"[^\u4E00-\u9FA5a-zA-Z0-9\-]*").unwrap();
-        let mut hostname = re.replace_all(&hostname, "").to_string();
-        if hostname.len() > 32 {
-            hostname = hostname.chars().take(32).collect::<String>();
-        }
-        cfg.set_hostname(Some(hostname));
+        cfg.set_hostname(cli.hostname.clone());
 
         cfg.set_network_identity(NetworkIdentity::new(
             cli.network_name.clone(),
diff --git a/easytier/src/peers/peer_ospf_route.rs b/easytier/src/peers/peer_ospf_route.rs
index b7b9624..1ea5152 100644
--- a/easytier/src/peers/peer_ospf_route.rs
+++ b/easytier/src/peers/peer_ospf_route.rs
@@ -68,7 +68,7 @@ struct RoutePeerInfo {
     cost: u8,
     ipv4_addr: Option<Ipv4Addr>,
     proxy_cidrs: Vec<String>,
-    hostname: Option<String>,
+    hostname: String,
     udp_stun_info: i8,
     last_update: SystemTime,
     version: Version,
@@ -82,7 +82,7 @@ impl RoutePeerInfo {
             cost: 0,
             ipv4_addr: None,
             proxy_cidrs: Vec::new(),
-            hostname: None,
+            hostname: String::new(),
             udp_stun_info: 0,
             last_update: SystemTime::now(),
             version: 0,
@@ -138,11 +138,7 @@ impl Into<crate::rpc::Route> for RoutePeerInfo {
             next_hop_peer_id: 0,
             cost: self.cost as i32,
             proxy_cidrs: self.proxy_cidrs.clone(),
-            hostname: if let Some(hostname) = &self.hostname {
-                hostname.clone()
-            } else {
-                "".to_string()
-            },
+            hostname: self.hostname,
             stun_info: {
                 let mut stun_info = StunInfo::default();
                 if let Ok(udp_nat_type) = NatType::try_from(self.udp_stun_info as i32) {
diff --git a/easytier/src/peers/peer_rip_route.rs b/easytier/src/peers/peer_rip_route.rs
index fda9e5a..3137e01 100644
--- a/easytier/src/peers/peer_rip_route.rs
+++ b/easytier/src/peers/peer_rip_route.rs
@@ -36,7 +36,7 @@ pub struct SyncPeerInfo {
     pub cost: u32,
     pub ipv4_addr: Option<Ipv4Addr>,
     pub proxy_cidrs: Vec<String>,
-    pub hostname: Option<String>,
+    pub hostname: String,
     pub udp_stun_info: i8,
 }
 
@@ -585,11 +585,7 @@ impl Route for BasicRoute {
             route.next_hop_peer_id = route_info.peer_id;
             route.cost = route_info.cost as i32;
             route.proxy_cidrs = route_info.proxy_cidrs.clone();
-            route.hostname = if let Some(hostname) = &route_info.hostname {
-                hostname.clone()
-            } else {
-                "".to_string()
-            };
+            route.hostname = route_info.hostname.clone();
 
             let mut stun_info = StunInfo::default();
             if let Ok(udp_nat_type) = NatType::try_from(route_info.udp_stun_info as i32) {