Hello ,
I want to simulate packets coming from 50 machines to a single machine.I mean each packet should have different IP address. Is there any way i can do this.
Thanks
Ashish

Setup 50 virtual interfaces on your nic

ifconfig eth0:1 192.168.0.2
ifconfig eth0:2 192.168.0.3

etc...

ping from each of them with

ping -I eth0:1 192.168.1.1
ping -I eth0:2 192.168.1.1

etc..


you might want to make a script to creat the interfaces and ping the system.

if I want to ping from different machines i can use this
ping -I eth0:1 192.168.1.1
ping -I eth0:2 192.168.1.1

but what about TCPIP connections .What if I want to establish TCP connections as if I from 50 different machines??

if I want to ping from different machines i can use this
ping -I eth0:1 192.168.1.1
ping -I eth0:2 192.168.1.1

but what about TCPIP connections .What if I want to establish TCP connections as if I from 50 different machines??

I guess you shold just use netcat.

Perhaps try hammerhead if you're load testing a webserver

if you want to send packets you can make a prog with raw sockets that change headers, so you'll write every address you want... but if you have to estabilish tcp connections i don't know

Add the address alias as listed above using ifconfig. Then in your code, specify your source address in the inaddr you feed to bind(), just like you do with connect(). Note that bind() will fail if the address isn't already added.

If you're not writing code, you may still be able to pull this off by using different destination addresses and adding -host routes mapping each destination address to a specific local address. Clearly this will be much more easily accomplished with a script.

If anyone knows how to add the addresses from within the program, I'd be much obliged to know.