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The use of packets with a false source IP address is not always evidence of malicious intent. For example, in performance testing of websites, hundreds or even thousands of "vusers" (virtual users) may be created, each executing a test script against the website under test, in order to simulate what will happen when the system goes "live" and a large number of users log in simultaneously.
Once a suitable zombie is found the next step would be to try to establish a TCP connection with a given service (port) of the target system, impersonating the zombie. It is done by sending a SYN packet to the target computer, spoofing the IP address from the zombie, i.e. with the source address equal to zombie IP address.
Every ISP runs a DNS server to allow their customers to translate domain names into IP addresses that computers understand and use. When an ISP's DNS server receives a request to translate a name, according to RFC the DNS server should return the associated IP address to the customer's computer which is then able to connect to the requested ...
Spoofing is the act of deception or hoaxing. [2] URLs are the address of a resource (as a document or website) on the Internet that consists of a communications protocol followed by the name or address of a computer on the network and that often includes additional locating information (as directory and file names). [3]
E-mail address spoofing is done in quite the same way as writing a forged return address using snail mail. As long as the letter fits the protocol, (i.e. stamp, postal code ) the Simple Mail Transfer Protocol (SMTP) will send the message.
Martian packets commonly arise from IP address spoofing in denial-of-service attacks, [2] but can also arise from network equipment malfunction or misconfiguration of a host. [ 1 ] In Linux terminology, a Martian packet is an IP packet received by the kernel on a specific interface, while routing tables indicate that the source IP is expected ...
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A Smurf amplifier is a computer network that lends itself to being used in a Smurf attack. Smurf amplifiers act to worsen the severity of a Smurf attack because they are configured in such a way that they generate a large number of ICMP replies to the victim at the spoofed source IP address.