diff --git a/binaries/cli/src/main.rs b/binaries/cli/src/main.rs
index e6b5f757b..6cef5bced 100644
--- a/binaries/cli/src/main.rs
+++ b/binaries/cli/src/main.rs
@@ -1,4 +1,7 @@
-use std::{net::Ipv4Addr, path::PathBuf};
+use std::{
+    net::{IpAddr, Ipv4Addr},
+    path::PathBuf,
+};
 
 use attach::attach_dataflow;
 use clap::Parser;
@@ -103,6 +106,11 @@ enum Command {
     Daemon {
         #[clap(long)]
         machine_id: Option<String>,
+        /// The IP address and port this daemon will bind to.
+        #[clap(long, default_value_t = SocketAddr::new(
+            IpAddr::V4(Ipv4Addr::new(0, 0, 0, 0)), 0)
+        )]
+        addr: SocketAddr,
         #[clap(long)]
         coordinator_addr: Option<SocketAddr>,
 
@@ -112,7 +120,12 @@ enum Command {
     /// Run runtime
     Runtime,
     /// Run coordinator
-    Coordinator { port: Option<u16> },
+    Coordinator {
+        #[clap(long, default_value_t = SocketAddr::new(
+            IpAddr::V4(Ipv4Addr::new(0, 0, 0, 0)), DORA_COORDINATOR_PORT_DEFAULT)
+        )]
+        addr: SocketAddr,
+    },
 }
 
 #[derive(Debug, clap::Args)]
@@ -266,20 +279,21 @@ fn run() -> eyre::Result<()> {
             }
         }
         Command::Destroy { config } => up::destroy(config.as_deref())?,
-        Command::Coordinator { port } => {
+        Command::Coordinator { addr } => {
             let rt = Builder::new_multi_thread()
                 .enable_all()
                 .build()
                 .context("tokio runtime failed")?;
             rt.block_on(async {
                 let (_port, task) =
-                    dora_coordinator::start(port, futures::stream::empty::<Event>()).await?;
+                    dora_coordinator::start(addr, futures::stream::empty::<Event>()).await?;
                 task.await
             })
             .context("failed to run dora-coordinator")?
         }
         Command::Daemon {
             coordinator_addr,
+            addr,
             machine_id,
             run_dataflow,
         } => {
@@ -301,12 +315,12 @@ fn run() -> eyre::Result<()> {
                         Daemon::run_dataflow(&dataflow_path).await
                     }
                     None => {
-                        let addr = coordinator_addr.unwrap_or_else(|| {
+                        let coordination_addr = coordinator_addr.unwrap_or_else(|| {
                             tracing::info!("Starting in local mode");
                             let localhost = Ipv4Addr::new(127, 0, 0, 1);
                             (localhost, DORA_COORDINATOR_PORT_DEFAULT).into()
                         });
-                        Daemon::run(addr, machine_id.unwrap_or_default()).await
+                        Daemon::run(coordination_addr, machine_id.unwrap_or_default(), addr).await
                     }
                 }
             })
diff --git a/binaries/coordinator/src/lib.rs b/binaries/coordinator/src/lib.rs
index 3d6be47d7..d9b77fa99 100644
--- a/binaries/coordinator/src/lib.rs
+++ b/binaries/coordinator/src/lib.rs
@@ -9,10 +9,7 @@ use dora_core::{
     daemon_messages::{DaemonCoordinatorEvent, DaemonCoordinatorReply, Timestamped},
     descriptor::{Descriptor, ResolvedNode},
     message::uhlc::{self, HLC},
-    topics::{
-        control_socket_addr, ControlRequest, ControlRequestReply, DataflowId,
-        DORA_COORDINATOR_PORT_DEFAULT,
-    },
+    topics::{control_socket_addr, ControlRequest, ControlRequestReply, DataflowId},
 };
 use eyre::{bail, eyre, ContextCompat, WrapErr};
 use futures::{stream::FuturesUnordered, Future, Stream, StreamExt};
@@ -39,11 +36,10 @@ mod run;
 mod tcp_utils;
 
 pub async fn start(
-    port: Option<u16>,
+    bind: SocketAddr,
     external_events: impl Stream<Item = Event> + Unpin,
 ) -> Result<(u16, impl Future<Output = eyre::Result<()>>), eyre::ErrReport> {
-    let port = port.unwrap_or(DORA_COORDINATOR_PORT_DEFAULT);
-    let listener = listener::create_listener(port).await?;
+    let listener = listener::create_listener(bind).await?;
     let port = listener
         .local_addr()
         .wrap_err("failed to get local addr of listener")?
@@ -175,29 +171,38 @@ async fn start_inner(
                     machine_id,
                     mut connection,
                     dora_version: daemon_version,
-                    listen_socket,
+                    listen_port,
                 } => {
-                    let coordinator_version = &env!("CARGO_PKG_VERSION");
-                    let reply = if &daemon_version == coordinator_version {
-                        RegisterResult::Ok
+                    let coordinator_version: &&str = &env!("CARGO_PKG_VERSION");
+                    let version_check = if &daemon_version == coordinator_version {
+                        Ok(())
                     } else {
-                        RegisterResult::Err(format!(
+                        Err(format!(
                             "version mismatch: daemon v{daemon_version} is \
-                            not compatible with coordinator v{coordinator_version}"
+                        not compatible with coordinator v{coordinator_version}"
                         ))
                     };
-                    let reply = Timestamped {
-                        inner: reply,
+                    let peer_ip = connection
+                        .peer_addr()
+                        .map(|addr| addr.ip())
+                        .map_err(|err| format!("failed to get peer addr of connection: {err}"));
+                    let register_result = version_check.and(peer_ip);
+
+                    let reply: Timestamped<RegisterResult> = Timestamped {
+                        inner: match &register_result {
+                            Ok(_) => RegisterResult::Ok,
+                            Err(err) => RegisterResult::Err(err.clone()),
+                        },
                         timestamp: clock.new_timestamp(),
                     };
                     let send_result = tcp_send(&mut connection, &serde_json::to_vec(&reply)?).await;
-                    match (reply.inner, send_result) {
-                        (RegisterResult::Ok, Ok(())) => {
+                    match (register_result, send_result) {
+                        (Ok(ip), Ok(())) => {
                             let previous = daemon_connections.insert(
                                 machine_id.clone(),
                                 DaemonConnection {
                                     stream: connection,
-                                    listen_socket,
+                                    listen_socket: (ip, listen_port).into(),
                                     last_heartbeat: Instant::now(),
                                 },
                             );
@@ -207,10 +212,10 @@ async fn start_inner(
                                 );
                             }
                         }
-                        (RegisterResult::Err(err), _) => {
+                        (Err(err), _) => {
                             tracing::warn!("failed to register daemon connection for machine `{machine_id}`: {err}");
                         }
-                        (RegisterResult::Ok, Err(err)) => {
+                        (Ok(_), Err(err)) => {
                             tracing::warn!("failed to confirm daemon connection for machine `{machine_id}`: {err}");
                         }
                     }
@@ -481,6 +486,12 @@ async fn start_inner(
                 let mut disconnected = BTreeSet::new();
                 for (machine_id, connection) in &mut daemon_connections {
                     if connection.last_heartbeat.elapsed() > Duration::from_secs(15) {
+                        tracing::warn!(
+                            "no heartbeat message from machine `{machine_id}` since {:?}",
+                            connection.last_heartbeat.elapsed()
+                        )
+                    }
+                    if connection.last_heartbeat.elapsed() > Duration::from_secs(30) {
                         disconnected.insert(machine_id.clone());
                         continue;
                     }
@@ -500,7 +511,7 @@ async fn start_inner(
                     }
                 }
                 if !disconnected.is_empty() {
-                    tracing::info!("Disconnecting daemons that failed watchdog: {disconnected:?}");
+                    tracing::error!("Disconnecting daemons that failed watchdog: {disconnected:?}");
                     for machine_id in disconnected {
                         daemon_connections.remove(&machine_id);
                     }
@@ -905,7 +916,7 @@ pub enum DaemonEvent {
         dora_version: String,
         machine_id: String,
         connection: TcpStream,
-        listen_socket: SocketAddr,
+        listen_port: u16,
     },
 }
 
diff --git a/binaries/coordinator/src/listener.rs b/binaries/coordinator/src/listener.rs
index ee78755fd..86600a4be 100644
--- a/binaries/coordinator/src/listener.rs
+++ b/binaries/coordinator/src/listener.rs
@@ -1,15 +1,14 @@
 use crate::{tcp_utils::tcp_receive, DaemonEvent, DataflowEvent, Event};
 use dora_core::{coordinator_messages, daemon_messages::Timestamped, message::uhlc::HLC};
 use eyre::{eyre, Context};
-use std::{io::ErrorKind, net::Ipv4Addr, sync::Arc};
+use std::{io::ErrorKind, net::SocketAddr, sync::Arc};
 use tokio::{
     net::{TcpListener, TcpStream},
     sync::mpsc,
 };
 
-pub async fn create_listener(port: u16) -> eyre::Result<TcpListener> {
-    let localhost = Ipv4Addr::new(127, 0, 0, 1);
-    let socket = match TcpListener::bind((localhost, port)).await {
+pub async fn create_listener(bind: SocketAddr) -> eyre::Result<TcpListener> {
+    let socket = match TcpListener::bind(bind).await {
         Ok(socket) => socket,
         Err(err) => {
             return Err(eyre::Report::new(err).wrap_err("failed to create local TCP listener"))
@@ -53,13 +52,13 @@ pub async fn handle_connection(
             coordinator_messages::CoordinatorRequest::Register {
                 machine_id,
                 dora_version,
-                listen_socket,
+                listen_port,
             } => {
                 let event = DaemonEvent::Register {
                     dora_version,
                     machine_id,
                     connection,
-                    listen_socket,
+                    listen_port,
                 };
                 let _ = events_tx.send(Event::Daemon(event)).await;
                 break;
diff --git a/binaries/daemon/src/coordinator.rs b/binaries/daemon/src/coordinator.rs
index 27ae8e49d..d2f86b3cc 100644
--- a/binaries/daemon/src/coordinator.rs
+++ b/binaries/daemon/src/coordinator.rs
@@ -24,7 +24,7 @@ pub struct CoordinatorEvent {
 pub async fn register(
     addr: SocketAddr,
     machine_id: String,
-    listen_socket: SocketAddr,
+    listen_port: u16,
     clock: &HLC,
 ) -> eyre::Result<impl Stream<Item = Timestamped<CoordinatorEvent>>> {
     let mut stream = TcpStream::connect(addr)
@@ -37,7 +37,7 @@ pub async fn register(
         inner: CoordinatorRequest::Register {
             dora_version: env!("CARGO_PKG_VERSION").to_owned(),
             machine_id,
-            listen_socket,
+            listen_port,
         },
         timestamp: clock.new_timestamp(),
     })?;
diff --git a/binaries/daemon/src/inter_daemon.rs b/binaries/daemon/src/inter_daemon.rs
index 40a8a34b3..7eb4b9485 100644
--- a/binaries/daemon/src/inter_daemon.rs
+++ b/binaries/daemon/src/inter_daemon.rs
@@ -1,11 +1,7 @@
 use crate::tcp_utils::{tcp_receive, tcp_send};
 use dora_core::daemon_messages::{InterDaemonEvent, Timestamped};
 use eyre::{Context, ContextCompat};
-use std::{
-    collections::BTreeMap,
-    io::ErrorKind,
-    net::{Ipv4Addr, SocketAddr},
-};
+use std::{collections::BTreeMap, io::ErrorKind, net::SocketAddr};
 use tokio::net::{TcpListener, TcpStream};
 
 pub struct InterDaemonConnection {
@@ -65,26 +61,27 @@ pub async fn send_inter_daemon_event(
 }
 
 pub async fn spawn_listener_loop(
+    bind: SocketAddr,
     machine_id: String,
     events_tx: flume::Sender<Timestamped<InterDaemonEvent>>,
-) -> eyre::Result<SocketAddr> {
-    let localhost = Ipv4Addr::new(127, 0, 0, 1);
-    let socket = match TcpListener::bind((localhost, 0)).await {
+) -> eyre::Result<u16> {
+    let socket = match TcpListener::bind(bind).await {
         Ok(socket) => socket,
         Err(err) => {
             return Err(eyre::Report::new(err).wrap_err("failed to create local TCP listener"))
         }
     };
-    let socket_addr = socket
+    let listen_port = socket
         .local_addr()
-        .wrap_err("failed to get local addr of socket")?;
+        .wrap_err("failed to get local addr of socket")?
+        .port();
 
     tokio::spawn(async move {
         listener_loop(socket, events_tx).await;
         tracing::debug!("inter-daemon listener loop finished for machine `{machine_id}`");
     });
 
-    Ok(socket_addr)
+    Ok(listen_port)
 }
 
 async fn listener_loop(
diff --git a/binaries/daemon/src/lib.rs b/binaries/daemon/src/lib.rs
index 9865d0eb9..59addea18 100644
--- a/binaries/daemon/src/lib.rs
+++ b/binaries/daemon/src/lib.rs
@@ -77,15 +77,19 @@ pub struct Daemon {
 }
 
 impl Daemon {
-    pub async fn run(coordinator_addr: SocketAddr, machine_id: String) -> eyre::Result<()> {
+    pub async fn run(
+        coordinator_addr: SocketAddr,
+        machine_id: String,
+        bind_addr: SocketAddr,
+    ) -> eyre::Result<()> {
         let clock = Arc::new(HLC::default());
 
         let ctrlc_events = set_up_ctrlc_handler(clock.clone())?;
 
         // spawn listen loop
         let (events_tx, events_rx) = flume::bounded(10);
-        let listen_socket =
-            inter_daemon::spawn_listener_loop(machine_id.clone(), events_tx).await?;
+        let listen_port =
+            inter_daemon::spawn_listener_loop(bind_addr, machine_id.clone(), events_tx).await?;
         let daemon_events = events_rx.into_stream().map(|e| Timestamped {
             inner: Event::Daemon(e.inner),
             timestamp: e.timestamp,
@@ -93,7 +97,7 @@ impl Daemon {
 
         // connect to the coordinator
         let coordinator_events =
-            coordinator::register(coordinator_addr, machine_id.clone(), listen_socket, &clock)
+            coordinator::register(coordinator_addr, machine_id.clone(), listen_port, &clock)
                 .await
                 .wrap_err("failed to connect to dora-coordinator")?
                 .map(
diff --git a/examples/multiple-daemons/run.rs b/examples/multiple-daemons/run.rs
index bd0722135..95f64de70 100644
--- a/examples/multiple-daemons/run.rs
+++ b/examples/multiple-daemons/run.rs
@@ -1,14 +1,14 @@
 use dora_coordinator::{ControlEvent, Event};
 use dora_core::{
     descriptor::Descriptor,
-    topics::{ControlRequest, ControlRequestReply, DataflowId},
+    topics::{ControlRequest, ControlRequestReply, DataflowId, DORA_COORDINATOR_PORT_DEFAULT},
 };
 use dora_tracing::set_up_tracing;
 use eyre::{bail, Context};
 
 use std::{
     collections::BTreeSet,
-    net::{Ipv4Addr, SocketAddr},
+    net::{IpAddr, Ipv4Addr, SocketAddr},
     path::Path,
     time::Duration,
 };
@@ -34,8 +34,13 @@ async fn main() -> eyre::Result<()> {
     build_dataflow(dataflow).await?;
 
     let (coordinator_events_tx, coordinator_events_rx) = mpsc::channel(1);
+    let coordinator_bind = SocketAddr::new(
+        IpAddr::V4(Ipv4Addr::new(0, 0, 0, 0)),
+        DORA_COORDINATOR_PORT_DEFAULT,
+    );
     let (coordinator_port, coordinator) =
-        dora_coordinator::start(None, ReceiverStream::new(coordinator_events_rx)).await?;
+        dora_coordinator::start(coordinator_bind, ReceiverStream::new(coordinator_events_rx))
+            .await?;
     let coordinator_addr = SocketAddr::new(Ipv4Addr::LOCALHOST.into(), coordinator_port);
     let daemon_a = run_daemon(coordinator_addr.to_string(), "A".into());
     let daemon_b = run_daemon(coordinator_addr.to_string(), "B".into());
diff --git a/libraries/core/src/coordinator_messages.rs b/libraries/core/src/coordinator_messages.rs
index e83ee784e..38e9eae2e 100644
--- a/libraries/core/src/coordinator_messages.rs
+++ b/libraries/core/src/coordinator_messages.rs
@@ -1,13 +1,12 @@
 use crate::daemon_messages::DataflowId;
 use eyre::eyre;
-use std::net::SocketAddr;
 
 #[derive(Debug, serde::Serialize, serde::Deserialize)]
 pub enum CoordinatorRequest {
     Register {
         dora_version: String,
         machine_id: String,
-        listen_socket: SocketAddr,
+        listen_port: u16,
     },
     Event {
         machine_id: String,