9 ssh – PLANET WGSW-48000 User Manual

Page 107

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User’s Manual of WGSW-48000

107

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Advanced Auto DoS Attack Prevention

Figure 4-7-22 Advanced Auto DoS Attack Prevention screenshot

4.7.9 SSH

SSH ( secure shell) is a network protocol that allows data to be exchanged using a secure channel between two networked

devices. SSH was designed as a replacement for TELNET and other insecure remote shells, which sent information, notably

passwords, in plaintext, leaving them open for interception. The encryption used by SSH provides confidentiality and integrity of

data over an insecure network, such as the Internet.

SSH uses public-key cryptography to authenticate the remote computer and allow the remote computer to authenticate the user,

if necessary. SSH is typically used to log into a remote machine and execute commands.

An SSH server, by default, listens on the standard TCP port 22.

Figure 4-7-23 SSH page screenshot

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