Network Services With the options chosen in the example capture window, the main display is also updated in real time: This example shows the start of an ssh session between two machines. This time, we won’t be seeing any plain text passwords! The point of showing tcpdump and ethereal is not to encourage you to go sniffing for packets on networks, but rather to illustrate just how easy it is to capture sensitive information such as passwords that are sent across broadcast networks, such as Ethernet. However, if you make sure that you use protocols such as ssh and sftp that encrypt sensitive data, then it won’t matter if someone is capturing the packets you send. 424
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