ddos | CC攻击程序，海量IP在线攻击 , DDOS攻击

I am scraping a website where after submitting a form I get redirected to this -

I am working on an SMS-based service that parses incoming texts and sends a response, building on top of Twilio. I am concerned about a possible ddos which would result in increased costs. Is there a way of preventing this or limiting the number of times a user can send SMS without you being charged? I am based in Australia, so some of the alternatives to Twilio are not available with local numbers.

While Azure Event hub can have thousands and million? of messages per second, the Azure IoT hub has a surprisingly low limitation on this.

• S1 has 12 msg/sec speed but allow 400.000 daily msg pr. unit
• S2 has 120 msg/sec speed but allow 6.000.000 daily msg pr. unit
• S3 has 6000 msg/sec speed but allow 300.000.000 daily msg pr unit.

Imagine an IoT solution where your devices normally sends 1 message every hour, but have the ability to activate a short "realtime" mode to send messages every second for about 2 minutes duration.

Example: 10.000 IoT devices:

Let's say 20% of these devices happens to start a realtime mode session simultaneously 4 times a day. (We do not have control over when those are started by individual customers). That is 2000 devices and burst speed needed is then 2000 msg/second.

Daily msg need:

• Normal messages: 10.000dev * 24hours = 240.000 msg/day
• Realtime messages daily count: 2.000dev * 120msg(2 min with 1 msg every second) * 4times a day = 960.000 messages Total daily msg count need: 240.000 + 960000 msg = 1.200.000 msg/day. Needed Azure IoT hub tier: S1 with 3 units gives 1.200.000 msg/day. ($25 * 3units = $75/month)

Burst speed needed:

• 2000 devices sending simultaneously every second for a couple of minutes a few times a day: 2000 msg/second. Needed Azure IoT hub tier: S2 with 17 units gives speed 2040 msg/second. ($250 * 17units = $4250/month) Or go for S3 with 1 unit, which gives speed 6000 msg/second. ($2500/month)

The daily message count requires only a low IoT hub tier due to the modest messages per day count, but the need for burst speed when realtime is activated requires an unproportionally very high IoT hub tier which skyrockets(33 times) the monthly costs for the solution, ruining the businesscase.

Is it possible to allow for temporary burst speeds at varying times during a day as long as the total number of daily messages sent does not surpass current tier max limit?

I understood from an article from 2016 by Nicole Berdy that the throttling on Azure IoT hub is in place to avoid DDOS attacks and misuse. However to be able to simulate realtime mode functionality with Azure IoT hub we need more Event Hub like messages/second speed. Can this be opened up by contacting support or something? Will it help if the whole solution is living inside its own protected network bubble?

Thanks,

I am trying to figure out how to get the text from Body within HttpRequest inside the OnActionExecuted method implemented for an IActionFilter. I have done hours of searching online, and tried many of the different solutions proposed, but each and every time the string representation is empty. To do a sanity check, I added the following to Startup within the Configure method:

The website i scapped blocked me out by showing 406 Not Acceptable on the browser. It might i mistakenly sent too many requests at once on phython code.

So i put time.sleep(10) for each loop to not make it look like a DDoS attack, and it seems worked out.

My questions are:

1. How long would it be reasonable to send between each request? Sleep 10 seconds for each loop makes my code running too slow.

2. How to fix the 406 Not Acceptable error on my browsers? They still block me out, only if i chance my ip address but it's not permanent solution.

Thank you all for your answers and comments. Good day!

I want to create a virtual private network in which I can manage virtual machines's interfaces with iproute2.

For example, with AZ CLI, I create two virtual machines in subnet 172.16.1.0/24, each machine has one interface: az network vnet create -g test -n net --address-prefix 172.16.0.0/16 --ddos-protection false --vm-protection false

az network vnet subnet create -g test --vnet-name net -n subnet1 --address-prefixes 172.16.1.0/24 --network-security-group test

az network nic create -g test -n vm1-nic --vnet-name net --subnet subnet1 --private-ip-address 172.16.1.10 --public-ip-address vm1-pub

az network nic create -g test -n vm2-nic --vnet-name net --subnet subnet1 --private-ip-address 172.16.1.11 --public-ip-address vm2-pub

az vm create -g test -n vm1 --image rhel --size Standard_F4 --generate-ssh-keys --nics vm1-nic

az vm create -g test -n vm2 --image rhel --size Standard_F4 --generate-ssh-keys --nics vm2-nic

Then I connect on vm1 with ssh, ping 172.16.1.11 should work.

It is possible to change vm's network interfaces ip addresses with iproute2 command? Like I put 10.100.0.1/24 on vm1's interface and 10.100.0.2/24 on vm2's interface with iprout2 command and I ping to 10.100.0.2 from 10.100.0.1.

I want to understand how virtual machines are connected, the connection is simulated as a wired connection which we can configure network interfaces?

Multer has a couple of optional parameters and I understand some of them. But my understanding is a bit unclear for:

1. fieldNameSize (is this just the size of field name in req.body or req.file?)
2. fieldSize (same as (1) but the field value instead?)
3. fields (is this just other fields in body?)
4. parts (no idea what this is)
5. headerPairs (like Bearer auth token header?)

One last thing. Points 3,4 have a limit of infinity by default. Would it be prudent to set some other limit? How do I determine what to set those to prevent DDOS.

Thanks!

I'm looking to use annotations like below for rate limiting for DDOS protection

Recently I am using pktgen to construct a tool for sending network packets to simulate DDoS attacks.The script I currently write can use four ports to send four different types of network packets. The code is as follows