private String findInterface(String ip) {
		for (String iface : myParentStack.getParentNode().getAllInterfacesNames()) {
			try {
				IPV4Address adress = new IPV4Address(ip);
				adress.setCustomSubnetMask(myParentStack.getSubnetMask(iface));
				if (adress.compareToSubnet(myParentStack.getIPAddress(iface))) {
					return iface;
				}
			} catch (Exception e) {
				e.printStackTrace();
			}
		}
		return null;
	}