Zyxel-communications 5 Series Manual do Utilizador descarregar pdf (Página 460)

ZyWALL 5/35/70 Series User’s Guide

460 Chapter 26 Remote Management

Figure 248 SSH Communication Example

26.6 How SSH Works

The following table summarizes how a secure connection is established between two remote

Figure 249 How SSH Works

1 Host Identification

The SSH client sends a connection request to the SSH server. The server identifies itself

with a host key. The client encrypts a randomly generated session key with the host key

and server key and sends the result back to the server.

The client automatically saves any new server public keys. In subsequent connections,

the server public key is checked against the saved version on the client computer.

2 Encryption Method

Once the identification is verified, both the client and server must agree on the type of

encryption method to use.

3 Authentication and Data Transmission

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Zyxel-communications 5 Series Manual do Utilizador Página 460