diff --git a/pymodbus/transport/transport.py b/pymodbus/transport/transport.py
index 6c7c00b3f..6ccc84eee 100644
--- a/pymodbus/transport/transport.py
+++ b/pymodbus/transport/transport.py
@@ -154,6 +154,7 @@ def __init__(
         self.call_create: Callable[[], Coroutine[Any, Any, Any]] = None  # type: ignore[assignment]
         self.reconnect_task: asyncio.Task | None = None
         self.listener: ModbusProtocol | None = None
+        self.is_listener: bool = False
         self.active_connections: dict[str, ModbusProtocol] = {}
         self.unique_id: str = str(id(self))
         self.reconnect_delay_current = 0.0
@@ -166,7 +167,7 @@ def __init__(
                 # This behaviour isn't quite right.
                 # It listens on any IPv4 address rather than the more natural default of any address (v6 or v4).
                 host = "0.0.0.0" # Any IPv4 host
-                port = 0 # Server will select an ephemeral port for itself
+                port = 502 # Server will listen on standard modbus port
         else:
             host = self.comm_params.host
             port = int(self.comm_params.port)
@@ -249,6 +250,7 @@ async def listen(self) -> bool:
         """Handle generic listen and call on to specific transport listen."""
         Log.debug("Awaiting connections {}", self.comm_params.comm_name)
         self.is_closing = False
+        self.is_listener = True
         try:
             self.transport = await self.call_create()
             if isinstance(self.transport, tuple):
@@ -281,7 +283,7 @@ def connection_lost(self, reason: Exception | None) -> None:
             return
         Log.debug("Connection lost {} due to {}", self.comm_params.comm_name, reason)
         self.__close()
-        if self.is_server:
+        if self.is_listener:
             self.reconnect_task = asyncio.create_task(self.do_relisten())
             self.reconnect_task.set_name("transport relisten")
         elif not self.listener and self.comm_params.reconnect_delay:
@@ -397,7 +399,7 @@ def __close(self, reconnect: bool = False) -> None:
             self.transport.close()
             self.transport = None  # type: ignore[assignment]
         self.recv_buffer = b""
-        if self.is_server:
+        if self.is_listener:
             for _key, value in self.active_connections.items():
                 value.listener = None
                 value.callback_disconnected(None)