@Override
    public Optional<Integer> getClientDestinationPort() {
        if (clientRemoteAddress instanceof InetSocketAddress inetSocketAddress) {
            return Optional.of(inetSocketAddress.getPort());
        } else {
            return Optional.empty();
        }
    }
The originally request host. This will NOT include port.

The Host header may contain port, but in this method we strip it out for consistency - use the
getOriginalPort method for that.
zuul-core/src/main/java/com/netflix/zuul/message/http/HttpRequestMessageImpl.java