This is some basic TCL code that used for some simulations. This code works on the NS-2 network simulator.
Simple simulation with flow monitors. It creates 4 nodes: 1 UDP source and 1 TCP source (FTP), 1 destination node and 1 transit node. It monitors the flows coming in and out from the queue in the link between the transit and destination node. It dumps the trace data to a flow file.
Ping Flood . It creates two nodes. Node 1 floods ping packets to Node 2. It could be useful to simulate Denial of Service attacks.
Simple DoS Attack. It creates a topology of 7 nodes. Two nodes generate valid traffic (one UDP and another TCP in the form of FTP). Another node generates and UDP DoS.
Thursday, 30 April 2009
Some NS-2 code to simulate DoS and DDoS attacks
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10 comments:
i execute tflow01 on ubuntu terminal, but the nam didn't pop out after i exec "ns tflow01.tcl", it only generate a txt result file. is it correct?
Thanks!
From the header of the tcl file there is some info:
# usage: ns tflow01.tcl [arg]
# arg = 1|2|3|4 depending of the output required
The output is in outputs_trace.txt
Because I was using this file as input to other process it has no headers identifying the meaning of each value. You will need to check in the source tcl. For example:
if {$out_print == 3 } {
puts $file_out "acks: $acks delta: $deltaacks wind: $window avgwd: $avgwind atack: $attack_flag"
}
to know what is in each variable you will need to check what it is querying from NS:
#puts -nonewline $file_out "RTT1:[$tcp set rtt_],[$tcp set rttvar_] "
#puts -nonewline $file_out "ack:[$tcp set ack_],[$tcp set dupacks_] "
#puts -nonewline $file_out "wind: [$tcp set cwnd_], [$tcp set awnd_] "
#puts -nonewline $file_out "sths: [$tcp set ssthresh_] backoff: [$tcp set backoff_] "
#puts -nonewline $file_out "maxseq:[$tcp set maxseq_] "
#puts $file_out " "
#puts $file_out "time: $now RTT5: [$tcp5 set rtt_]"
#puts -nonewline $file_out "RTT1:[$tcp set rtt_],[$tcp set rttvar_] "
And about NAM, it is disabled. You will need to uncomment the line as indicated in the 'finish' procedure:
#Execute NAM on the trace file, uncomment the next line to exec NAM automatically
#exec nam out.nam &
Thanks Arturo, i got it.
But i have another problem on your pingflood.tcl, when i launch it in the terminal, it normally appear the Nam with two node, but when i start it, it stopped at 0.0020000 all the time. I'm not sure what problem it is, but i am using Nam 1.14 on Ubuntu 9.04.
Sorry for my poor english.
Actually i just want to create 4 nodes to test the ping flood. that mean Node 1 is server, connecting with other 3 nodes. Nodes 4 is attacker which ping flooding the server, another two nodes fail to request service from the server because Nodes 4 is exhausted all bandwidth from server. Do my concept have anything wrong? Thanks...
Dear Arturo,
I've ran the pingflood file and it generated a trace file. but i am not quite understand what the number meaning. something like:
+ 0.2 0 1 ping 1500 ------- 0 0.0 1.0 -1 0
- 0.2 0 1 ping 1500 ------- 0 0.0 1.0 -1 0
Would you mind to tell me what's those represent for?
Really thanks!!...
i tried to check out the tcl script.. but my browser says forbidden!!
i want to download files but its error 403 can any one please repair it
Dear Arturo,
When i try to download the tcl files, there's the following error that occurs:
You don't have permission to access /~aservin/code/monitor_one_int.tcl on this server.
Is there some other website i can get them from?
thx!
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