ZyXEL MM-7201 User Guide - Page 314
Introduction to HTTPS
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Chapter 40 Access Control 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 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. 40.4.2 SSH Implementation on the Switch Your switch supports SSH version 2 using RSA authentication and three encryption methods (DES, 3DES and Blowfish). The SSH server is implemented on the switch for remote management and file transfer on port 22. Only one SSH connection is allowed at a time. 40.4.2.1 Requirements for Using SSH You must install an SSH client program on a client computer (Windows or Linux operating system) that is used to connect to the switch over SSH. 40.5 Introduction to HTTPS HTTPS (HyperText Transfer Protocol over Secure Socket Layer, or HTTP over SSL) is a web protocol that encrypts and decrypts web pages. Secure Socket Layer (SSL) is an application-level protocol that enables secure transactions of data by ensuring confidentiality (an unauthorized party cannot read the transferred data), authentication (one party can identify the other party) and data integrity (you know if data has been changed). It relies upon certificates, public keys, and private keys. 314 MS-7206 User's Guide