diff --git a/embassy-net/src/device.rs b/embassy-net/src/device.rs
index fc9d0894..f66ebc19 100644
--- a/embassy-net/src/device.rs
+++ b/embassy-net/src/device.rs
@@ -21,7 +21,7 @@ pub trait Device {
     fn register_waker(&mut self, waker: &Waker);
     fn capabilities(&mut self) -> DeviceCapabilities;
     fn link_state(&mut self) -> LinkState;
-    fn ethernet_address(&mut self) -> [u8; 6];
+    fn ethernet_address(&self) -> [u8; 6];
 }
 
 pub struct DeviceAdapter {
diff --git a/embassy-net/src/lib.rs b/embassy-net/src/lib.rs
index c4229446..ffe786b3 100644
--- a/embassy-net/src/lib.rs
+++ b/embassy-net/src/lib.rs
@@ -15,7 +15,9 @@ pub use config::{Config, Configurator, Event as ConfigEvent, StaticConfigurator}
 
 pub use device::{Device, LinkState};
 pub use packet_pool::{Packet, PacketBox, PacketBoxExt, PacketBuf, MTU};
-pub use stack::{init, is_config_up, is_init, is_link_up, run, StackResources};
+pub use stack::{
+    config, ethernet_address, init, is_config_up, is_init, is_link_up, run, StackResources,
+};
 
 #[cfg(feature = "tcp")]
 mod tcp_socket;
diff --git a/embassy-net/src/stack.rs b/embassy-net/src/stack.rs
index 8623a727..9461f832 100644
--- a/embassy-net/src/stack.rs
+++ b/embassy-net/src/stack.rs
@@ -21,7 +21,7 @@ use smoltcp::wire::{EthernetAddress, HardwareAddress, IpAddress};
 use crate::config::Configurator;
 use crate::config::Event;
 use crate::device::{Device, DeviceAdapter, LinkState};
-use crate::Interface;
+use crate::{Config, Interface};
 
 const LOCAL_PORT_MIN: u16 = 1025;
 const LOCAL_PORT_MAX: u16 = 65535;
@@ -56,7 +56,7 @@ static STACK: ThreadModeMutex<RefCell<Option<Stack>>> = ThreadModeMutex::new(Ref
 pub(crate) struct Stack {
     pub iface: Interface,
     link_up: bool,
-    config_up: bool,
+    config: Option<Config>,
     next_local_port: u16,
     configurator: &'static mut dyn Configurator,
     waker: WakerRegistration,
@@ -113,7 +113,7 @@ impl Stack {
                     debug!("   DNS server {}:    {}", i, s);
                 }
 
-                self.config_up = true;
+                self.config = Some(config)
             }
             Event::Deconfigured => {
                 debug!("Lost IP configuration");
@@ -122,7 +122,7 @@ impl Stack {
                 if medium == Medium::Ethernet {
                     self.iface.routes_mut().remove_default_ipv4_route();
                 }
-                self.config_up = false;
+                self.config = None
             }
         }
     }
@@ -209,7 +209,7 @@ pub fn init<const ADDR: usize, const SOCK: usize, const NEIGH: usize>(
     let stack = Stack {
         iface,
         link_up: false,
-        config_up: false,
+        config: None,
         configurator,
         next_local_port: local_port,
         waker: WakerRegistration::new(),
@@ -218,6 +218,18 @@ pub fn init<const ADDR: usize, const SOCK: usize, const NEIGH: usize>(
     *STACK.borrow().borrow_mut() = Some(stack);
 }
 
+pub fn ethernet_address() -> [u8; 6] {
+    STACK
+        .borrow()
+        .borrow()
+        .as_ref()
+        .unwrap()
+        .iface
+        .device()
+        .device
+        .ethernet_address()
+}
+
 pub fn is_init() -> bool {
     STACK.borrow().borrow().is_some()
 }
@@ -227,7 +239,11 @@ pub fn is_link_up() -> bool {
 }
 
 pub fn is_config_up() -> bool {
-    STACK.borrow().borrow().as_ref().unwrap().config_up
+    STACK.borrow().borrow().as_ref().unwrap().config.is_some()
+}
+
+pub fn config() -> Option<Config> {
+    STACK.borrow().borrow().as_ref().unwrap().config.clone()
 }
 
 pub async fn run() -> ! {
diff --git a/embassy-stm32/src/eth/v1/mod.rs b/embassy-stm32/src/eth/v1/mod.rs
index f102f431..e6ffd047 100644
--- a/embassy-stm32/src/eth/v1/mod.rs
+++ b/embassy-stm32/src/eth/v1/mod.rs
@@ -334,7 +334,7 @@ impl<'d, T: Instance, P: PHY, const TX: usize, const RX: usize> Device
         }
     }
 
-    fn ethernet_address(&mut self) -> [u8; 6] {
+    fn ethernet_address(&self) -> [u8; 6] {
         self.mac_addr
     }
 }
diff --git a/embassy-stm32/src/eth/v2/mod.rs b/embassy-stm32/src/eth/v2/mod.rs
index 023ec7a0..d43d4f1a 100644
--- a/embassy-stm32/src/eth/v2/mod.rs
+++ b/embassy-stm32/src/eth/v2/mod.rs
@@ -268,7 +268,7 @@ impl<'d, T: Instance, P: PHY, const TX: usize, const RX: usize> Device
         }
     }
 
-    fn ethernet_address(&mut self) -> [u8; 6] {
+    fn ethernet_address(&self) -> [u8; 6] {
         self.mac_addr
     }
 }
diff --git a/examples/nrf/src/bin/usb_ethernet.rs b/examples/nrf/src/bin/usb_ethernet.rs
index 70460d23..f14a29c4 100644
--- a/examples/nrf/src/bin/usb_ethernet.rs
+++ b/examples/nrf/src/bin/usb_ethernet.rs
@@ -265,7 +265,7 @@ impl embassy_net::Device for Device {
         RX_CHANNEL.try_recv().ok()
     }
 
-    fn ethernet_address(&mut self) -> [u8; 6] {
+    fn ethernet_address(&self) -> [u8; 6] {
         self.mac_addr
     }
 }
diff --git a/examples/std/src/tuntap.rs b/examples/std/src/tuntap.rs
index 328479e6..09a4be07 100644
--- a/examples/std/src/tuntap.rs
+++ b/examples/std/src/tuntap.rs
@@ -219,7 +219,7 @@ impl Device for TunTapDevice {
         LinkState::Up
     }
 
-    fn ethernet_address(&mut self) -> [u8; 6] {
+    fn ethernet_address(&self) -> [u8; 6] {
         [0x02, 0x03, 0x04, 0x05, 0x06, 0x07]
     }
 }