Packet crafting is a technique that allows network administrators to probe firewall rule-sets and find entry points into a targeted system or network. This is done by manually generating packets to test network devices and behaviour, instead of using existing network traffic. Testing may target the firewall, IDS, TCP/IP stack, router or any other component of the network.
Packets are usually created by using a packet generator or packet analyzer which allows for specific options and flags to be set on the created packets. The act of packet crafting can be broken into four stages: Packet Assembly, Packet Editing, Packet Play and Packet Decoding. Tools exist for each of the stages - some tools are focussed only on one stage while others such as Ostinato try to encompass all stages.
http://www.scs.ryerson.ca/~zereneh/cn8001/CN8001-PacketCraftingUsingScapy-WilliamZereneh.pdf
http://opensourceforu.com/2012/05/cyber-attacks-explained-packet-crafting/
http://resources.infosecinstitute.com/15-best-free-packet-crafting-tools/
Packets are usually created by using a packet generator or packet analyzer which allows for specific options and flags to be set on the created packets. The act of packet crafting can be broken into four stages: Packet Assembly, Packet Editing, Packet Play and Packet Decoding. Tools exist for each of the stages - some tools are focussed only on one stage while others such as Ostinato try to encompass all stages.
http://www.scs.ryerson.ca/~zereneh/cn8001/CN8001-PacketCraftingUsingScapy-WilliamZereneh.pdf
http://opensourceforu.com/2012/05/cyber-attacks-explained-packet-crafting/
http://resources.infosecinstitute.com/15-best-free-packet-crafting-tools/
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