ZyXEL Communications XS1920 Series, User Manual

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Chapter 40 Access Control
XS1920 Series User’s Guide
355
40.7.2 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.
1
HTTPS connection requests from an SSL-aware web browser go to port 443 (by default) on the
Switch’s WS (web server).
2
HTTP connection requests from a web browser go to port 80 (by default) on the Switch’s WS (web
server).
Figure 250
HTTPS Implementation
rmon RmonRisingAlarm 1.3.6.1.2.1.16.0.1 This trap is sent when a variable
goes over the RMON "rising"
threshold.
RmonFallingAlarm 1.3.6.1.2.1.16.0.2 This trap is sent when the variable
falls below the RMON "falling"
threshold.
Table 186
SNMP System Traps (continued)
OPTION OBJECT LABEL OBJECT ID DESCRIPTION