ZyXEL Communications OMC-2301, User Manual

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Chapter 13 Access Control
OMC-2301 User’s Guide
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13.7 SSH Implementation on the OMC
Your OMC supports SSH version 2 using RSA authentication and three encryption methods
(DES, 3DES and Blowfish). The SSH server is implemented on the OMC for remote
management and file transfer on port 22.
13.7.1 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 OMC over SSH.
13.8 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 OMC is used so that you may securely access the OMC using the web
configurator. The SSL protocol specifies that the SSL server (the OMC) must always
authenticate itself to the SSL client (the computer which requests the HTTPS connection with
the OMC), 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 OMC a certificate. You must apply for a certificate for the browser from a
CA that is a trusted CA on the OMC.
Please refer to the following figure.
1
HTTPS connection requests from an SSL-aware web browser go to port 443 (by default)
on the OMC’s WS (web server).
2
HTTP connection requests from a web browser go to port 80 (by default) on the OMC’s
WS (web server).
Figure 51 HTTPS Implementation