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Sarah Edwards
Nov 17, 2014, 5:29:58 PM11/17/14
to Venu Madhav Kamaraju, Sarah Edwards, geni-...@googlegroups.com
Hi Venu,
A couple of thoughts (some of which we just discussed on the phone, but I'm just repeating here to keep folks in the loop):
= To answer your question =
It looks like you have an RSpec that works with InstaGENI racks. I was able to reserve this topology at three different racks: Utah DDC InstaGENI, GaTech InstaGENI, and GPO InstaGENI (which is a development rack which is often overloaded, so you shouldn't use that one).
I'm still waiting for my resources to become ready (aka turn green) but they seem to reserve ok.
Can you send us the error and a screenshot of what you are seeing? Which rack on you trying to reserve from?
FYI We're starting phasing out the use of Flack in favor of a new tool which is currently in beta and is called Jacks [1] and is very similar to Flack. The other issue I can imagine is that perhaps you picked a rack that was heavily loaded [2].
= Safety of doing a DDOS attack =
If you are just sending a large volume of traffic within a single rack, we think this is ok and you can proceed when you are ready. That said, it might be best to try to schedule your first attempt at loading the system during normal business hours (M-F, 9-5) that way if something goes wrong, there will be someone around to assist.
In addition, you should check one thing about your connectivity before you start sending large volumes of traffic.
Basically since you have both a data plane and a control plane interface your traffic could theoretically traverse either path depending on how you configure routing.
Please double or even triple check to make sure traffic is flowing on the data plane interface before you start sending a large volume of traffic. A simple way of doing this might be to run tcpdump on the dataplane interface while you send a small amount of traffic just to make sure you see the traffic flow on the interface you think it should. (Alternatively you might bring down a data plane interface (using `sudo ifconfig IFNAME down` and then make sure traffic stops. You can reenable the interface with `sudo ifconfig IFNAME up`).
= Tools for sending large amounts of traffic =
The hping3 tool you are looking at seems reasonable for generating a large amount of traffic. You might look at iperf. Also scapy will allow you to write a custom tool which generates a variety of traffic types.
Here's a page about scapy:
Others might have other suggestions. My main advice is to start small and send small amounts of traffic while you figure out what works.
Good luck!
Sarah
[1] If you're interested in using this tool, here are the instructions for Lab Zero with Jacks:
[2] You can check the load of InstaGENI racks here. You want to look for columns labeled as "xen" VMs with very little gray on the graph.
On Nov 17, 2014, at 4:34 PM, Venu Madhav Kamaraju <vk...@mst.edu> wrote:
<rspec (1)(1).xml>Thanks & Regards.I am trying to reserve resources at InstaGENI rack using flack tool.Here,I attached the Rspec. Can you let me know if this work will interfere any other experiments?I am planning to do a DDOS attack using 7 VMs to attack on a single VM, as a part of my project . I am using ubuntu platform (64 bit). In my experiment, I am flooding the network by sending TCP/IP packets(65500) using hping3 function.Dear Sarah,Greetings!!
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