code: public static boolean isValidIpPort(@NotNull final String portStr) {
          return ipPortPattern.matcher(StringUtils.strip(portStr)).matches();
      }
docs: Given an ip port string, it checks if it's a valid ip port with a regex (see ipPortPattern attribute)
  
  @param portStr the string to check if it's a valid ip port
  @return true if it's a valid ip port, false otherwise