diff --git a/.gitignore b/.gitignore
index 5bf44a7..75654b8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 /log
 /target
+/server_config.yml
\ No newline at end of file
diff --git a/phira-mp-server/Cargo.toml b/phira-mp-server/Cargo.toml
index 5ea403e..9c9061a 100644
--- a/phira-mp-server/Cargo.toml
+++ b/phira-mp-server/Cargo.toml
@@ -8,6 +8,7 @@ anyhow = { version = "1.0", features = ["backtrace"] }
 phira-mp-common = { path = "../phira-mp-common" }
 reqwest = { version = "0.11.18", features = ["json"] }
 serde = { version = "1.0.163", features = ["derive"] }
+serde_yaml = "0.9"
 tap = "1.0.1"
 tokio = "*"
 tracing = "0.1.37"
diff --git a/phira-mp-server/src/server.rs b/phira-mp-server/src/server.rs
index a6859ad..62e1083 100644
--- a/phira-mp-server/src/server.rs
+++ b/phira-mp-server/src/server.rs
@@ -2,7 +2,7 @@ use crate::{vacant_entry, IdMap, Room, SafeMap, Session, User};
 use anyhow::Result;
 use phira_mp_common::RoomId;
 use serde::Deserialize;
-use std::sync::Arc;
+use std::{fs, sync::Arc};
 use tokio::{net::TcpListener, sync::mpsc, task::JoinHandle};
 use tracing::{info, warn};
 use uuid::Uuid;
@@ -13,6 +13,18 @@ pub struct Chart {
     pub name: String,
 }
 
+#[derive(Debug, Deserialize)]
+pub struct ServerConfig {
+    pub monitors: Vec<i32>
+}
+impl Default for ServerConfig {
+    fn default() -> Self {
+        Self {
+            monitors: vec![2],
+        }
+    }
+}
+
 #[derive(Debug, Deserialize)]
 pub struct Record {
     pub id: i32,
@@ -30,6 +42,7 @@ pub struct Record {
 }
 
 pub struct ServerState {
+    pub config: ServerConfig,
     pub sessions: IdMap<Arc<Session>>,
     pub users: SafeMap<i32, Arc<User>>,
 
@@ -41,14 +54,140 @@ pub struct ServerState {
 pub struct Server {
     state: Arc<ServerState>,
     listener: TcpListener,
+    lost_con_handle: JoinHandle<()>,
+}
+
+impl From<TcpListener> for Server {use crate::{vacant_entry, IdMap, Room, SafeMap, Session, User};
+use anyhow::Result;
+use phira_mp_common::RoomId;
+use serde::Deserialize;
+use std::{fs::File, sync::Arc};
+use tokio::{net::TcpListener, sync::mpsc, task::JoinHandle};
+use tracing::{info, warn};
+use uuid::Uuid;
+
+#[derive(Debug, Deserialize)]
+pub struct Chart {
+    pub id: i32,
+    pub name: String,
+}
 
+#[derive(Debug, Deserialize)]
+pub struct ServerConfig {
+    pub monitors: Vec<i32>,
+}
+impl Default for ServerConfig {
+    fn default() -> Self {
+        Self { monitors: vec![2] }
+    }
+}
+
+#[derive(Debug, Deserialize)]
+pub struct Record {
+    pub id: i32,
+    pub player: i32,
+    pub score: i32,
+    pub perfect: i32,
+    pub good: i32,
+    pub bad: i32,
+    pub miss: i32,
+    pub max_combo: i32,
+    pub accuracy: f32,
+    pub full_combo: bool,
+    pub std: f32,
+    pub std_score: f32,
+}
+
+pub struct ServerState {
+    pub config: ServerConfig,
+    pub sessions: IdMap<Arc<Session>>,
+    pub users: SafeMap<i32, Arc<User>>,
+
+    pub rooms: SafeMap<RoomId, Arc<Room>>,
+
+    pub lost_con_tx: mpsc::Sender<Uuid>,
+}
+
+pub struct Server {
+    state: Arc<ServerState>,
+    listener: TcpListener,
     lost_con_handle: JoinHandle<()>,
 }
 
 impl From<TcpListener> for Server {
     fn from(listener: TcpListener) -> Self {
         let (lost_con_tx, mut lost_con_rx) = mpsc::channel(16);
+        let config: ServerConfig = File::open("server_config.yml")
+            .ok()
+            .and_then(|f| serde_yaml::from_reader(f).ok())
+            .unwrap_or_default();
+        let state = Arc::new(ServerState {
+            config,
+            sessions: IdMap::default(),
+            users: SafeMap::default(),
+
+            rooms: SafeMap::default(),
+
+            lost_con_tx,
+        });
+        let lost_con_handle = tokio::spawn({
+            let state = Arc::clone(&state);
+            async move {
+                while let Some(id) = lost_con_rx.recv().await {
+                    warn!("lost connection with {id}");
+                    if let Some(session) = state.sessions.write().await.remove(&id) {
+                        if session
+                            .user
+                            .session
+                            .read()
+                            .await
+                            .as_ref()
+                            .map_or(false, |it| it.ptr_eq(&Arc::downgrade(&session)))
+                        {
+                            Arc::clone(&session.user).dangle().await;
+                        }
+                    }
+                }
+            }
+        });
+
+        Self {
+            listener,
+            state,
+
+            lost_con_handle,
+        }
+    }
+}
+
+impl Server {
+    pub async fn accept(&self) -> Result<()> {
+        let (stream, addr) = self.listener.accept().await?;
+        let mut guard = self.state.sessions.write().await;
+        let entry = vacant_entry(&mut guard);
+        let session = Session::new(*entry.key(), stream, Arc::clone(&self.state)).await?;
+        info!(
+            "received connections from {addr} ({}), version: {}",
+            session.id,
+            session.version()
+        );
+        entry.insert(session);
+        Ok(())
+    }
+}
+
+impl Drop for Server {
+    fn drop(&mut self) {
+        self.lost_con_handle.abort();
+    }
+}
+
+    fn from(listener: TcpListener) -> Self {
+        let (lost_con_tx, mut lost_con_rx) = mpsc::channel(16);
+        let config: 
+        let config: ServerConfig = serde_yaml::from_str(&fs::read_to_string("server_config.yml").unwrap();
         let state = Arc::new(ServerState {
+            config,
             sessions: IdMap::default(),
             users: SafeMap::default(),
 
diff --git a/phira-mp-server/src/session.rs b/phira-mp-server/src/session.rs
index 07a9932..278a4f6 100644
--- a/phira-mp-server/src/session.rs
+++ b/phira-mp-server/src/session.rs
@@ -27,7 +27,6 @@ use tracing::{debug, debug_span, error, info, trace, warn, Instrument};
 use uuid::Uuid;
 
 const HOST: &str = "https://phira.5wyxi.com";
-const MONITORS: &[i32] = &[2, 143245];
 
 pub struct User {
     pub id: i32,
@@ -71,7 +70,7 @@ impl User {
     }
 
     pub fn can_monitor(&self) -> bool {
-        MONITORS.contains(&self.id)
+        self.server.config.monitors.contains(&self.id)
     }
 
     pub async fn set_session(&self, session: Weak<Session>) {