code: public OvhFirewallIp ip_firewall_POST(String ip, String ipOnFirewall) throws IOException {
  		String qPath = "/ip/{ip}/firewall";
  		StringBuilder sb = path(qPath, ip);
  		HashMap<String, Object>o = new HashMap<String, Object>();
  		addBody(o, "ipOnFirewall", ipOnFirewall);
  		String resp = exec(qPath, "POST", sb.toString(), o);
  		return convertTo(resp, OvhFirewallIp.class);
  	}
docs: AntiDDOS option. Add new IP on firewall
  
  REST: POST /ip/{ip}/firewall
  @param ipOnFirewall [required]
  @param ip [required]