how to customize TCP Hand shake for HTTP

sivagirirajan · 02-13-2015, 12:47 AM

I am very new to linux , i would like to know how to customize TCP hand shake for my HTTP server . please help me where i have to do modification in linux to performe the same.

NevemTeve · 02-13-2015, 04:37 AM

Exactly what do you mean by 'customize TCP Hand shake'?

sivagirirajan · 02-13-2015, 04:50 AM

TCP does three way hand shaking , in which i need to avoid/change/modify packet header of my reply packet to my client who is requesting HTTP service to my webserver

NevemTeve · 02-13-2015, 05:50 AM

I really don't think you should do that, but please explain your problem with details.

sivagirirajan · 02-13-2015, 06:16 AM

why dont i do this....it is my need i would like to avoid few typical attacks like DOS so that i am doing it

jpollard · 02-13-2015, 07:08 AM

That won't prevent DOS attacks...

And most likely will break TCP entirely.

If you want an isolated network, just disconnect from the internet.

sivagirirajan · 02-13-2015, 07:14 AM

Dear all how to it works or make it work is my research please help me in customizing tch handshake .please help on this

NevemTeve · 02-13-2015, 07:22 AM

I really don't think you should do that, but please explain your problem with details.

SoftSprocket · 02-13-2015, 08:42 AM

The TCP stack is implemented in the kernel so you'll have to modify that. Some reading to get you going:
http://www.ece.virginia.edu/cheetah/...s/TCPlinux.pdf
http://www.cubrid.org/blog/dev-platf...network-stack/
http://lxr.free-electrons.com/source/net/ipv4/tcp.c

sivagirirajan · 02-16-2015, 10:39 PM

Thank you SoftSprocket , i will try and come back