IP spoofing is a technique used to gain
unauthorized access to computers, whereby the risk to the Internet and computer
network community. Since then, the Internet has suffered a huge number of
large-scale attacks a hacker must first use a variety of techniques to find an
IP address of a trusted host and then modify the packets are coming from that
host. packet headers so that it appears that the IP spoofing has been
identified as a real intruder sends messages to a computer with an IP address
indicating that the message is coming from a trusted host.
IP
routing is hop by hop. Every IP packet is routed separately. The route of a IP
packet is decided by all the routers the packet goes through.IP
address spoofing is possible because routers only require inspection of the
destination IP address in the packet to make routing decisions. The source IP
address is not required by routers and an invalid source IP address will not
affect the delivery of packets. That address is only used by the destination
machine when it responds back to the source.
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