Ethernet Server : changing port on live (instead of hard coding it)

[Baptistou]

Hello, I have a little question : is there a way to change the port of an EthernetServer during code runtime ?
Cf ChatServer example below

#include <SPI.h>
#include <NativeEthernet.h>

// Enter a MAC address and IP address for your controller below.
// The IP address will be dependent on your local network.
// gateway and subnet are optional:
byte mac[] = {
  0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
IPAddress ip(192, 168, 1, 177);
IPAddress myDns(192, 168, 1, 1);
IPAddress gateway(192, 168, 1, 1);
IPAddress subnet(255, 255, 0, 0);


// telnet defaults to port 23 ----> this is this port that we want to change during code runtime
EthernetServer server(23);
boolean alreadyConnected = false; // whether or not the client was connected previously

void setup() {
  
  Ethernet.begin(mac, ip, myDns, gateway, subnet);

  Serial.begin(9600);
   while (!Serial) {
    ;
  }

  // Check for Ethernet hardware present
  if (Ethernet.hardwareStatus() == EthernetNoHardware) {
    Serial.println("Ethernet shield was not found.  Sorry, can't run without hardware. :(");
    while (true) {
      delay(1); // do nothing, no point running without Ethernet hardware
    }
  }
  if (Ethernet.linkStatus() == LinkOFF) {
    Serial.println("Ethernet cable is not connected.");
  }

  // start listening for clients
  server.begin();

  Serial.print("Chat server address:");
  Serial.println(Ethernet.localIP());
}

void loop() {
  // wait for a new client:
  EthernetClient client = server.available();

  // when the client sends the first byte, say hello:
  if (client) {
    if (!alreadyConnected) {
      // clear out the input buffer:
      client.flush();
      Serial.println("We have a new client");
      client.println("Hello, client!");
      alreadyConnected = true;
    }

    if (client.available() > 0) {
      // read the bytes incoming from the client:
      char thisChar = client.read();
      // echo the bytes back to the client:
      server.write(thisChar);
      // echo the bytes to the server as well:
      Serial.write(thisChar);
    }
  }
}

The server port is hardcoded to 23, but I wish to be able to change it during code runtime. Is there a simple way to do this ?
I'm working on Teensy 4.1 with Native Ethernet.