diff --git a/libs/hbb_common/protos/discovery.proto b/libs/hbb_common/protos/discovery.proto
index 09474f53a..e24fe32bf 100644
--- a/libs/hbb_common/protos/discovery.proto
+++ b/libs/hbb_common/protos/discovery.proto
@@ -4,9 +4,10 @@ package discovery;
 import "base_proto.proto";
 
 message Discovery {
-  base.PeerInfo peer = 1;
+  string id = 1;
+  base.PeerInfo peer = 2;
   /// response port for current listening port(udp for now)
-  int32 port = 2;
+  int32 port = 3;
 }
 
 message DiscoveryBack {
diff --git a/libs/socket_cs/examples/discovery.rs b/libs/socket_cs/examples/discovery.rs
index 74f38a6e2..a23d80878 100644
--- a/libs/socket_cs/examples/discovery.rs
+++ b/libs/socket_cs/examples/discovery.rs
@@ -14,6 +14,7 @@ async fn lan_discover(port: u16, port_back: u16) {
         ..Default::default()
     };
     let client = DiscoveryClient::create(DiscoveryProto {
+        id: "client id".to_owned(),
         peer: protobuf::MessageField::from_option(Some(peer)),
         port: port_back as i32,
         ..Default::default()
diff --git a/libs/socket_cs/src/discovery.rs b/libs/socket_cs/src/discovery.rs
index c808acabf..c18334971 100644
--- a/libs/socket_cs/src/discovery.rs
+++ b/libs/socket_cs/src/discovery.rs
@@ -32,7 +32,7 @@ impl DiscoveryClient {
         log::trace!("succeeded to bind {} for discovery client", addr);
 
         socket.set_broadcast(true)?;
-        log::info!("Broadcast mode set to ON");
+        log::trace!("Broadcast mode set to ON");
 
         let send_data = make_send_data(CMD_DISCOVERY, &info)?;
         Ok(Self { socket, send_data })
@@ -47,6 +47,7 @@ impl DiscoveryClient {
 
 pub struct HandlerDiscovery {
     get_allow: Option<fn() -> bool>,
+    id: String,
     send_data: Vec<u8>,
 }
 
@@ -55,6 +56,7 @@ impl HandlerDiscovery {
         let send_data = make_send_data(CMD_DISCOVERY_BACK, &self_info).unwrap();
         Self {
             get_allow,
+            id: self_info.id,
             send_data,
         }
     }
@@ -63,11 +65,13 @@ impl HandlerDiscovery {
 #[async_trait]
 impl crate::Handler<UdpRequest> for HandlerDiscovery {
     async fn call(&self, request: UdpRequest) -> ResultType<()> {
-        log::trace!("received discover query from {}", request.addr);
-
         let discovery = DiscoveryProto::parse_from_bytes(&request.data)?;
+        if discovery.id == self.id {
+            return Ok(());
+        }
+
         let peer = discovery.peer.as_ref().take().unwrap();
-        log::debug!(
+        log::trace!(
             "received discovery query from {} {}",
             peer.username,
             peer.hostname
@@ -75,12 +79,12 @@ impl crate::Handler<UdpRequest> for HandlerDiscovery {
 
         let allowed = self.get_allow.map_or(false, |f| f());
         if !allowed {
-            log::info!(
-                "received discovery query from {} {} {}, but discovery is not allowed",
-                request.addr,
-                peer.hostname,
-                peer.username
-            );
+            // log::info!(
+            //     "received discovery query from {} {} {}, but discovery is not allowed",
+            //     request.addr,
+            //     peer.hostname,
+            //     peer.username
+            // );
             return Ok(());
         }
 
@@ -89,7 +93,7 @@ impl crate::Handler<UdpRequest> for HandlerDiscovery {
 
         let mut peer_addr = request.addr;
         peer_addr.set_port(discovery.port as u16);
-        log::debug!("send self peer info to {}", peer_addr);
+        log::trace!("send self peer info to {}", peer_addr);
 
         let send_len = self.send_data.len();
         let mut cur_len = 0usize;
diff --git a/libs/socket_cs/src/udp.rs b/libs/socket_cs/src/udp.rs
index fad6bc452..73bdb77e4 100644
--- a/libs/socket_cs/src/udp.rs
+++ b/libs/socket_cs/src/udp.rs
@@ -64,7 +64,6 @@ impl Server {
                         break;
                     }
                     n = server.next() => {
-                        log::info!("received message");
                         let handlers = handlers.clone();
                         let rt = rt.clone();
                         match n {
@@ -76,24 +75,24 @@ impl Server {
                                             match handlers.get(&cmd) {
                                                 Some(h) => {
                                                     let request = UdpRequest {data: data[p+1..].to_vec(), addr};
-                                                    if let Err(e) = h.call(request).await {
-                                                        log::error!("handle {:?} failed, {}", cmd, e);
+                                                    if let Err(_e) = h.call(request).await {
+                                                        // log::error!("handle {:?} failed, {}", cmd, e);
                                                     }
                                                 }
                                                 None => {
-                                                    log::warn!("no handler for {:?}", &cmd);
+                                                    // log::warn!("no handler for {:?}", &cmd);
                                                 }
                                             }
                                         });
                                     }
                                     None => {
-                                        log::error!("failed to parse command token");
+                                        // log::error!("failed to parse command token");
                                     }
                                 }
 
                             }
-                            Some(Err(e)) => {
-                                log::error!("recv error: {}", e)
+                            Some(Err(_e)) => {
+                                // log::error!("recv error: {}", e)
                             }
                             None => {
                                 log::error!("should never reach here");
@@ -139,11 +138,12 @@ impl UdpHandlers {
     /// ```rust
     /// extern crate socket_cs;
     /// use socket_cs::{ResultType, udp::{UdpHandlers, UdpRequest}};
+    /// use async_trait::async_trait;
     ///
     /// struct SimpleHandler;
     ///
     /// #[async_trait]
-    /// impl crate::Handler<UdpRequest> for SimpleHandler {
+    /// impl socket_cs::Handler<UdpRequest> for SimpleHandler {
     ///     async fn call(&self, _: UdpRequest) -> ResultType<()> {
     ///         Ok(())
     ///     }
diff --git a/src/ipc.rs b/src/ipc.rs
index 9727faa92..7a8b855e2 100644
--- a/src/ipc.rs
+++ b/src/ipc.rs
@@ -389,6 +389,22 @@ pub fn get_id() -> String {
     }
 }
 
+pub async fn get_id_async() -> String {
+    if let Ok(Some(v)) = get_config_async("id", 1_000).await {
+        // update salt also, so that next time reinstallation not causing first-time auto-login failure
+        if let Ok(Some(v2)) = get_config_async("salt", 1_000).await {
+            Config::set_salt(&v2);
+        }
+        if v != Config::get_id() {
+            Config::set_key_confirmed(false);
+            Config::set_id(&v);
+        }
+        v
+    } else {
+        Config::get_id()
+    }
+}
+
 pub fn get_password() -> String {
     if let Ok(Some(v)) = get_config("password") {
         Config::set_password(&v);
diff --git a/src/server.rs b/src/server.rs
index c2c43a930..fe1d36da4 100644
--- a/src/server.rs
+++ b/src/server.rs
@@ -28,7 +28,7 @@ mod connection;
 pub mod input_service;
 mod service;
 mod video_service;
-mod udp;
+pub mod udp;
 
 use hbb_common::tcp::new_listener;
 
diff --git a/src/server/udp.rs b/src/server/udp.rs
index c9f3621ae..7eeea6f26 100644
--- a/src/server/udp.rs
+++ b/src/server/udp.rs
@@ -25,23 +25,20 @@ fn get_peer_info() -> PeerInfo {
     }
 }
 
-mod discovery {
+pub mod discovery {
     use super::get_peer_info;
     use crate::ipc;
     use hbb_common::{
-        base_proto::PeerInfo,
-        config::{PeerConfig, PeerInfoSerde},
+        config::{Config, PeerConfig, PeerInfoSerde, SERVER_UDP_PORT},
         discovery_proto::{Discovery as DiscoveryProto, DiscoveryBack as DiscoveryBackProto},
-        log, protobuf,
-        tokio::runtime::Runtime,
-        ResultType,
+        log, protobuf, tokio, ResultType,
     };
     use socket_cs::{discovery::*, udp::UdpHandlers};
 
-    fn get_discovery_back_info() -> DiscoveryBackProto {
+    async fn get_discovery_back_info() -> DiscoveryBackProto {
         let peer = get_peer_info();
         DiscoveryBackProto {
-            id: ipc::get_id(),
+            id: ipc::get_id_async().await,
             peer: protobuf::MessageField::from_option(Some(peer)),
             ..Default::default()
         }
@@ -59,35 +56,52 @@ mod discovery {
         config.info = serde;
         config.store(info.id.as_str());
 
-        let rt = match Runtime::new() {
-            Ok(r) => r,
-            Err(e) => {
-                log::error!("Failed to notify index window, {}", e);
-                return;
-            }
-        };
-
+        #[tokio::main(flavor = "current_thread")]
         async fn notify_index_window() -> ResultType<()> {
-            let ms_timeout = 1000;
+            let ms_timeout = 300;
             let mut c = ipc::connect(ms_timeout, "_index").await?;
             c.send(&ipc::Data::SessionsUpdated).await?;
             Ok(())
         }
-        rt.block_on(async move {
-            if let Err(e) = notify_index_window().await {
+        std::thread::spawn(move || {
+            if let Err(e) = notify_index_window() {
                 log::error!("Failed to notify index window, {}", e);
             }
         });
     }
 
-    // pub(crate) fn lan_discover();
+    pub fn launch_lan_discover() {
+        std::thread::spawn(move || {
+            if let Err(e) = lan_discover() {
+                log::error!("Failed to lauch lan discover, {}", e);
+            }
+        });
+    }
 
-    pub(super) fn handle_discovery(handlers: UdpHandlers) -> UdpHandlers {
-        let info = get_discovery_back_info();
+    #[tokio::main(flavor = "current_thread")]
+    pub async fn lan_discover() -> ResultType<()> {
+        let peer = get_peer_info();
+        let client = DiscoveryClient::create(DiscoveryProto {
+            id: ipc::get_id_async().await,
+            peer: protobuf::MessageField::from_option(Some(peer)),
+            port: SERVER_UDP_PORT as i32,
+            ..Default::default()
+        })
+        .await?;
+
+        client.lan_discover(SERVER_UDP_PORT).await
+    }
+
+    pub(super) async fn handle_discovery(handlers: UdpHandlers) -> UdpHandlers {
+        let info = get_discovery_back_info().await;
         handlers
             .handle(
                 CMD_DISCOVERY.as_bytes().to_vec(),
-                Box::new(HandlerDiscovery::new(Some(|| true), info)),
+                Box::new(HandlerDiscovery::new(
+                    // Some(|| Config::get_option("enable-be-discovered") == "Y".to_owned()),
+                    Some(|| true),
+                    info,
+                )),
             )
             .handle(
                 CMD_DISCOVERY_BACK.as_bytes().to_vec(),
@@ -97,7 +111,7 @@ mod discovery {
 }
 
 pub(super) async fn start_udp_server() -> ResultType<Server> {
-    let handlers = discovery::handle_discovery(UdpHandlers::new());
+    let handlers = discovery::handle_discovery(UdpHandlers::new()).await;
 
     let mut server = Server::create(SERVER_UDP_PORT)?;
     server.start(handlers).await?;
diff --git a/src/ui.rs b/src/ui.rs
index 0f0f4717c..cba285303 100644
--- a/src/ui.rs
+++ b/src/ui.rs
@@ -87,7 +87,7 @@ pub fn start(args: &mut [String]) {
         let cloned = childs.clone();
         std::thread::spawn(move || check_zombie(cloned));
         let cloned = childs.clone();
-        tokio::spawn(async move {start_ipc(cloned)});
+        std::thread::spawn(move || start_ipc(cloned));
         crate::common::check_software_update();
         frame.event_handler(UI::new(childs));
         frame.sciter_handler(UIHostHandler {});
@@ -567,6 +567,10 @@ impl UI {
     fn is_xfce(&self) -> bool {
         crate::platform::is_xfce()
     }
+
+    fn lan_discover(&self) {
+        crate::server::udp::discovery::launch_lan_discover();
+    }
 }
 
 impl sciter::EventHandler for UI {
@@ -615,6 +619,7 @@ impl sciter::EventHandler for UI {
         fn get_software_ext();
         fn open_url(String);
         fn create_shortcut(String);
+        fn lan_discover();
     }
 }
 
diff --git a/src/ui/index.tis b/src/ui/index.tis
index 55fcf6f7c..903a1a030 100644
--- a/src/ui/index.tis
+++ b/src/ui/index.tis
@@ -51,12 +51,17 @@ class RecentSessions: Reactor.Component {
         sessions = sessions.map(this.getSession);
         return <div style="width: *">
             <div .recent-sessions-title>RECENT SESSIONS</div>
+            <button .button #discover>DISCOVER</button>
             <div .recent-sessions-content key={sessions.length}>
                 {sessions}
             </div>
         </div>;
     }
 
+    event click $(button#discover) {
+        handler.lan_discover();
+    }
+
     function getSession(s) {
         var id = s[0];
         var username = s[1];