Ssh Implementation On The Nwa1123 - ZyXEL Communications NWA1123 Series User Manual

Figure 89 How SSH v1 Works Example
Host Identification
1
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.
Encryption Method
2
Once the identification is verified, both the client and server must agree on the type of encryption
method to use.
Authentication and Data Transmission
3
After the identification is verified and data encryption activated, a secure tunnel is established
between the client and the server. The client then sends its authentication information (user name
and password) to the server to log in to the server.

13.5.2 SSH Implementation on the NWA1123

Your NWA1123 supports SSH versions 1 and 2 using RSA authentication and four encryption methods
(AES, 3DES, Archfour, and Blowfish). The SSH server is implemented on the NWA1123 for management
using port 22 (by default).
Chapter 13 System
NWA1123 Series User's Guide
141