ZyXEL XGS4700-48F User Guide - Page 409
How SSH works
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Chapter 45 Access Control 45.6 How SSH works The following table summarizes how a secure connection is established between two remote hosts. Figure 226 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. XGS4700-48F User's Guide 409
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