How to simulate a DDOS attack and observe the performance of the attacked server?

[PrithviMonangi]

Hello all, I'm looking for a proper software using which I could analyse the performance of the server under a DDOS attack and also to implement a logic to prevent the key attacker. Could it be done in OPNET? I'm confused actually. Please help me how do I go about doing it. Your help would be very useful to me. Thanks in advance!

 

[bill001g]

The software firewalls in the server already protect against all the more common attacks. Hardware firewall help to mitigate any cpu/memory type of load put on a server from having to run the firewall software to defend itself by offloading this to the firewall. Not sure what you intend to accomplish by simulating the attacks all they will show is you should use a hardware firewall.

You need to decide which of the many attacks you intend to try and there are programs to generate those.

If you are just looking at a brute force attack that send a lot of data you can use a simple tool like iperf and tell it to send at whatever rate you like. Still why even bother there is no way to fix a attack whose goal is use up all you bandwidth. There is nothing you can do about this. Your only option is to discard the data but it has already caused all the damage already because it consumes the bandwidth before your devices even sees it.