ZyXEL Communications OLT2406, User Manual

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Chapter 44 Access Control
OLT2406 User’s Guide
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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.
44.7.2.2 SSH Implementation on the Switch
Your OLT supports SSH version 2 using RSA authentication and three encryption methods (DES, 3DES and
Blowfish). The SSH server is implemented on the OLT for remote management and file transfer on port 22.
Only one SSH connection is allowed at a time.
44.7.2.3 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 OLT over SSH.
44.7.3 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.
HTTPS on the OLT is used so that you may securely access the OLT using the web configurator. The SSL
protocol specifies that the SSL server (the OLT) must always authenticate itself to the SSL client (the
computer which requests the HTTPS connection with the OLT), whereas the SSL client only should
authenticate itself when the SSL server requires it to do so. Authenticating client certificates is optional
and if selected means the SSL-client must send the OLT a certificate. You must apply for a certificate for
the browser from a Certificate Authority (CA) that is a trusted CA on the OLT.
Please refer to the following figure.
1
HTTPS connection requests from an SSL-aware web browser go to port 443 (by default) on the OLT’s WS
(web server).
2
HTTP connection requests from a web browser go to port 80 (by default) on the OLT’s WS (web server).