diff --git a/nvflare/private/fed/app/simulator/simulator_runner.py b/nvflare/private/fed/app/simulator/simulator_runner.py
index b7b63f9349..1d19fac603 100644
--- a/nvflare/private/fed/app/simulator/simulator_runner.py
+++ b/nvflare/private/fed/app/simulator/simulator_runner.py
@@ -450,8 +450,6 @@ def simulator_run_main(self):
             try:
                 self.create_clients()
                 self.server.engine.run_processes[SimulatorConstants.JOB_NAME] = {
-                    RunProcessKey.LISTEN_PORT: None,
-                    RunProcessKey.CONNECTION: None,
                     RunProcessKey.CHILD_PROCESS: None,
                     RunProcessKey.JOB_ID: SimulatorConstants.JOB_NAME,
                     RunProcessKey.PARTICIPANTS: self.server.engine.client_manager.clients,
diff --git a/nvflare/private/fed/client/client_engine.py b/nvflare/private/fed/client/client_engine.py
index 6f7c8d6690..6c4acb92e9 100644
--- a/nvflare/private/fed/client/client_engine.py
+++ b/nvflare/private/fed/client/client_engine.py
@@ -24,7 +24,6 @@
 from nvflare.apis.fl_constant import FLContextKey, MachineStatus, SystemComponents, WorkspaceConstants
 from nvflare.apis.fl_context import FLContext, FLContextManager
 from nvflare.apis.workspace import Workspace
-from nvflare.fuel.utils.network_utils import get_open_ports
 from nvflare.private.defs import ERROR_MSG_PREFIX, ClientStatusKey, EngineConstant
 from nvflare.private.event import fire_event
 from nvflare.private.fed.server.job_meta_validator import JobMetaValidator
@@ -161,15 +160,12 @@ def start_app(
 
         self.logger.info("Starting client app. rank: {}".format(self.rank))
 
-        open_port = get_open_ports(1)[0]
-
         server_config = list(self.client.servers.values())[0]
         self.client_executor.start_app(
             self.client,
             job_id,
             self.args,
             app_custom_folder,
-            open_port,
             allocated_resource,
             token,
             resource_manager,
diff --git a/nvflare/private/fed/client/client_executor.py b/nvflare/private/fed/client/client_executor.py
index 8830cdbf9e..b93aaf637d 100644
--- a/nvflare/private/fed/client/client_executor.py
+++ b/nvflare/private/fed/client/client_executor.py
@@ -42,7 +42,6 @@ def start_app(
         job_id,
         args,
         app_custom_folder,
-        listen_port,
         allocated_resource,
         token,
         resource_manager,
@@ -56,7 +55,6 @@ def start_app(
             job_id: the job_id
             args: admin command arguments for starting the FL client training
             app_custom_folder: FL application custom folder
-            listen_port: port to listen the command.
             allocated_resource: allocated resources
             token: token from resource manager
             resource_manager: resource manager
@@ -149,7 +147,6 @@ def start_app(
         job_id,
         args,
         app_custom_folder,
-        listen_port,
         allocated_resource,
         token,
         resource_manager: ResourceManagerSpec,
@@ -163,7 +160,6 @@ def start_app(
             job_id: the job_id
             args: admin command arguments for starting the worker process
             app_custom_folder: FL application custom folder
-            listen_port: port to listen the command.
             allocated_resource: allocated resources
             token: token from resource manager
             resource_manager: resource manager
@@ -208,8 +204,6 @@ def start_app(
 
         with self.lock:
             self.run_processes[job_id] = {
-                RunProcessKey.LISTEN_PORT: listen_port,
-                RunProcessKey.CONNECTION: None,
                 RunProcessKey.CHILD_PROCESS: process,
                 RunProcessKey.STATUS: ClientStatus.STARTING,
             }
diff --git a/nvflare/private/fed/server/server_engine.py b/nvflare/private/fed/server/server_engine.py
index 65393b7e94..d59128cd81 100644
--- a/nvflare/private/fed/server/server_engine.py
+++ b/nvflare/private/fed/server/server_engine.py
@@ -50,7 +50,6 @@
 from nvflare.fuel.f3.cellnet.defs import MessageHeaderKey
 from nvflare.fuel.f3.cellnet.defs import ReturnCode as CellMsgReturnCode
 from nvflare.fuel.utils.argument_utils import parse_vars
-from nvflare.fuel.utils.network_utils import get_open_ports
 from nvflare.fuel.utils.zip_utils import zip_directory_to_bytes
 from nvflare.private.admin_defs import Message, MsgHeader
 from nvflare.private.defs import CellChannel, CellMessageHeaderKeys, RequestHeader, TrainingTopic, new_cell_message
@@ -179,13 +178,11 @@ def start_app_on_server(self, run_number: str, job: Job = None, job_clients=None
             if not isinstance(job, Job):
                 return "Must provide a job object to start the server app."
 
-            open_ports = get_open_ports(2)
             self._start_runner_process(
                 self.args,
                 app_root,
                 run_number,
                 app_custom_folder,
-                open_ports,
                 job.job_id,
                 job_clients,
                 snapshot,
@@ -233,7 +230,6 @@ def _start_runner_process(
         app_root,
         run_number,
         app_custom_folder,
-        open_ports,
         job_id,
         job_clients,
         snapshot,
@@ -244,7 +240,6 @@ def _start_runner_process(
         if app_custom_folder != "":
             add_custom_dir_to_path(app_custom_folder, new_env)
 
-        listen_port = open_ports[1]
         if snapshot:
             restore_snapshot = True
         else:
@@ -289,8 +284,6 @@ def _start_runner_process(
 
         with self.lock:
             self.run_processes[run_number] = {
-                RunProcessKey.LISTEN_PORT: listen_port,
-                RunProcessKey.CONNECTION: None,
                 RunProcessKey.CHILD_PROCESS: process,
                 RunProcessKey.JOB_ID: job_id,
                 RunProcessKey.PARTICIPANTS: job_clients,
diff --git a/nvflare/private/fed/simulator/simulator_client_engine.py b/nvflare/private/fed/simulator/simulator_client_engine.py
index 8a7fa16377..fd0a3969c1 100644
--- a/nvflare/private/fed/simulator/simulator_client_engine.py
+++ b/nvflare/private/fed/simulator/simulator_client_engine.py
@@ -25,8 +25,6 @@ def __init__(self, client, args, rank=0):
         fl_ctx.set_prop(FLContextKey.SIMULATE_MODE, True, private=True, sticky=True)
 
         self.client_executor.run_processes[SimulatorConstants.JOB_NAME] = {
-            RunProcessKey.LISTEN_PORT: None,
-            RunProcessKey.CONNECTION: None,
             RunProcessKey.CHILD_PROCESS: None,
             RunProcessKey.STATUS: ClientStatus.STARTED,
         }