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July 11, 2005 at 8:25 am
#5767
I am not touching the ACK/SYN at all, I am modifying the ip_len and the payload only. that too, if the packet has payload then only i am modifying the packet.
If you change length of the TCP packet then you should modify SYN/ACK fields.
Is there any way I can drop the old packet? How can I remove it from the local stack?
Actually you already drop the original packet, but system generates it again and again (because your invalid packet is droped by remote system).