Management; Chapter 14 Management; Overview; What You Need To Know - ZyXEL Communications XGS1250-12 User Manual

14.1 Overview

This chapter explains how to use the Management screens to configure settings on the Switch, such as
login password change, firmware upgrade, system reset or reboot, IP address change, and so on.

14.1.1 What You Need to Know

Read this section to know more about IEEE 802.3az Energy Efficient Ethernet (EEE) and HTTPS (HyperText
Transfer Protocol over Secure Socket Layer, or HTTP over SSL).
14.1.1.1 IEEE 802.3az Energy Efficient Ethernet (EEE)
If EEE is enabled, both sides of a link support EEE and there is no traffic, the port enters Low Power Idle
(LPI) mode. LPI mode turns off some functions of the physical layer (becomes quiet) to save power.
Periodically the port transmits a REFRESH signal to allow the link partner to keep the link alive. When there
is traffic to be sent, a WAKE signal is sent to the link partner to return the link to active mode.
14.1.1.2 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 Switch is used so that you may securely access the Switch using the web configurator. The
SSL protocol specifies that the SSL server (the Switch) must always authenticate itself to the SSL client (the
computer which requests the HTTPS connection with the Switch), 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 Switch a certificate. You must apply for a certificate
for the browser from a Certificate Authority (CA) that is a trusted CA on the Switch.
Please refer to the following figure.
HTTPS connection requests from an SSL-aware web browser go to port 443 (by default) on the Switch's
1
WS (web server).
HTTP connection requests from a web browser go to port 80 (by default) on the Switch's WS (web
2
server).

Chapter 14 Management

Management

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