in log4j-server/src/main/java/org/apache/logging/log4j/server/TcpSocketServer.java [243:251]
public TcpSocketServer(
final int port,
final int backlog,
final InetAddress localBindAddress,
final String configLocation,
final LogEventBridge<T> logEventInput)
throws IOException {
this(port, configLocation, logEventInput, new ServerSocket(port, backlog, localBindAddress));
}