ZyXEL UAG715 User Guide - Page 457
How SSH Works
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Figure 312 SSH Communication Over the WAN Example Chapter 39 System A 39.8.1 How SSH Works The following figure is an example of how a secure connection is established between two remote hosts using SSH v1. Figure 313 How SSH v1 Works Example 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. UAG715 User's Guide 457
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