diff --git a/hosts/aluminium/ports.nix b/hosts/aluminium/ports.nix
index baaf25a..a259d6d 100644
--- a/hosts/aluminium/ports.nix
+++ b/hosts/aluminium/ports.nix
@@ -5,5 +5,5 @@ custom-utils.validatePortAttrset {
   unifi.tcp = 8443;
   doorbell-audiosocket.tcp = 9092;
   doorbell-webrtc.tcp = 8889;
-  doorbell-webrtc-ice.udp = 8189;
+  doorbell-webrtc-ice.tcp = 8189;
 }
diff --git a/hosts/aluminium/services/doorbell.nix b/hosts/aluminium/services/doorbell.nix
index f3fc61a..e2b7229 100644
--- a/hosts/aluminium/services/doorbell.nix
+++ b/hosts/aluminium/services/doorbell.nix
@@ -23,9 +23,11 @@ in
       enable = true;
       bindAddress = "192.168.0.1";
       webrtcPort = ports.doorbell-webrtc.tcp;
-      webrtcIceUdpPort = ports.doorbell-webrtc-ice.udp;
+      webrtcIceTcpPort = ports.doorbell-webrtc-ice.tcp;
     };
   };
-  networking.firewall.interfaces.lechner.allowedTCPPorts = [ ports.doorbell-webrtc.tcp ];
-  networking.firewall.interfaces.lechner.allowedUDPPorts = [ ports.doorbell-webrtc-ice.udp ];
+  networking.firewall.interfaces.lechner.allowedTCPPorts = [
+    ports.doorbell-webrtc.tcp
+    ports.doorbell-webrtc-ice.tcp
+  ];
 }
diff --git a/pkgs/myintercom-doorbell/module.nix b/pkgs/myintercom-doorbell/module.nix
index 3bb8dc0..066b9ca 100644
--- a/pkgs/myintercom-doorbell/module.nix
+++ b/pkgs/myintercom-doorbell/module.nix
@@ -5,18 +5,18 @@ let
   mediamtxConfig = pkgs.writeTextFile {
     name = "myintercom-doorbell-cam-proxy-config";
     text = lib.generators.toJSON { } {
-      paths.sprechanlage.source = "rtsp://${cfg.username}:__PASSWORD__@${cfg.host}/axis-media/media.amp?videocodec=h264&resolution=1280x720&fps=8&audio=0";
-      protocols = [ "udp" ];
+      paths.sprechanlage = {
+        source = "rtsp://${cfg.username}:__PASSWORD__@${cfg.host}/axis-media/media.amp?videocodec=h264&resolution=1280x720&fps=8&audio=0";
+        rtspTransport = "tcp";
+      };
+      protocols = [ "tcp" ];
       hls = false;
       rtmp = false;
       rtsp = false;
       srt = false;
-
       webrtc = true;
-      webrtcAddress = "${cfg.cam.bindAddress}:${toString cfg.cam.webrtcPort}";
-
-      webrtcICEHostNAT1To1IPs = [ cfg.cam.bindAddress ];
-      webrtcICEUDPMuxAddress = ":${toString cfg.cam.webrtcIceUdpPort}";
+      webrtcAdditionalHosts = [ cfg.cam.bindAddress ];
+      webrtcLocalTCPAddress = "${cfg.cam.bindAddress}:${toString cfg.cam.webrtcIceTcpPort}";
     };
   };
 in
@@ -35,7 +35,7 @@ in
         description = "Port the WebRTC service binds to.";
         default = 8889;
       };
-      webrtcIceUdpPort = mkOption {
+      webrtcIceTcpPort = mkOption {
         type = types.port;
         description = "Port (udp) the WebRTC ICE service binds to.";
         default = 8189;
@@ -128,6 +128,7 @@ in
         Environment = [
           "LISTEN_ADDRESS=${cfg.audiosocket.address}"
           "LISTEN_PORT=${toString cfg.audiosocket.port}"
+          "HOST=${cfg.host}"
           "USERNAME=${cfg.username}"
           "PASSWORD_FILE=%d/password"
         ];
diff --git a/pkgs/myintercom-doorbell/myintercom_doorbell/myintercom_audiosocket.py b/pkgs/myintercom-doorbell/myintercom_doorbell/myintercom_audiosocket.py
index 6467d24..574dc28 100644
--- a/pkgs/myintercom-doorbell/myintercom_doorbell/myintercom_audiosocket.py
+++ b/pkgs/myintercom-doorbell/myintercom_doorbell/myintercom_audiosocket.py
@@ -8,7 +8,7 @@ from threading import Thread
 from .audiosocket import Audiosocket
 
 
-def open_url(direction, connection, username, password):
+def open_url(direction, connection, host, username, password):
     print(f"start {direction}", flush=True)
     if direction not in ("transmit", "receive"):
         raise NotImplementedError
@@ -17,7 +17,7 @@ def open_url(direction, connection, username, password):
         "transmit": ("POST", {"Content-Type": "audio/basic", "Content-Length": "0"}),
     }[direction]
 
-    url = f"http://192.168.0.74/axis-cgi/audio/{direction}.cgi"
+    url = f"http://{host}/axis-cgi/audio/{direction}.cgi"
 
     http = urllib3.PoolManager()
 
@@ -44,18 +44,18 @@ def open_url(direction, connection, username, password):
             connection.send_bytes(data)
 
 
-def handle_connection(call, username, password):
+def handle_connection(call, host, username, password):
     print(f"Received connection from {call.peer_addr}")
 
     pipe_transmit_in, pipe_transmit_out = Pipe()
     doorbell_transmit_process = Process(
-        target=open_url, args=("transmit", pipe_transmit_out, username, password)
+        target=open_url, args=("transmit", pipe_transmit_out, host, username, password)
     )
     doorbell_transmit_process.start()
 
     pipe_receive_in, pipe_receive_out = Pipe()
     doorbell_receive_process = Process(
-        target=open_url, args=("receive", pipe_receive_in, username, password)
+        target=open_url, args=("receive", pipe_receive_in, host, username, password)
     )
     doorbell_receive_process.start()
 
@@ -80,6 +80,7 @@ def main():
     audiosocket.prepare_input(inrate=8000, channels=1, ulaw2lin=True)
 
     print("Listening for new connections " f"from Asterisk on port {audiosocket.port}")
+    host = os.environ["HOST"]
     username = os.environ["USERNAME"]
 
     with open(os.environ["PASSWORD_FILE"], "r", encoding="utf-8") as f:
@@ -88,7 +89,9 @@ def main():
     while True:
         call = audiosocket.listen()
 
-        call_thread = Thread(target=handle_connection, args=(call, username, password))
+        call_thread = Thread(
+            target=handle_connection, args=(call, host, username, password)
+        )
         call_thread.start()
 
         call_thread.join()