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It uses port tcp/25 and although there is a secure alternative on port tcp/464, the port tcp/25 is open practically on every mail server today due to the backward compatibility. Simple Mail Transfer Protocol (SMTP) has also been with us for many decades. #How to use wireshark to find evidence of hacking password#Example of a telnet communication with captured password can be seen in the following screenshot:Īn attacker could now completely overtake the Cisco router. Since telnet is a plain text protocol, a well positioned adversary can eavesdrop on the communication and capture everything, including passwords. ![]()
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