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How TFTP Works

TFTP is a UDP/IP protocol that uses port 69. It is used to upload (GET) and download (PUT) files between computer systems without authentication. It operates on a client/server architecture. If we can install/use a TFTP server on our Kali system, then we can use it to upload hacking software to the target system from a command line.
For instance, if we wanted to grab the password hashes and crack them, we would need to upload samdump2 and pwdump to the target system like in this tutorial. After grabbing the password hashes, we could then use TFTP to download the files to Kali for cracking offline.


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