ZyXEL Communications P-2802H-I Series, User Manual

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Chapter 19 Remote Management Configuration
P-2802H(W)(L)-I Series User’s Guide
257
19.2 WWW (HTTP and 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 (see
Chapter 15 on page 211 for more
information).
HTTPS on the ZyXEL Device is used so that you may securely access the ZyXEL Device
using the web configurator. The SSL protocol specifies that the SSL server (the ZyXEL
Device) must always authenticate itself to the SSL client (the computer which requests the
HTTPS connection with the ZyXEL Device), whereas the SSL client only should authenticate
itself when the SSL server requires it to do so (select
Authenticate Client Certificates in the
REMOTE MGMT > WWW screen). Authenticate Client Certificates is optional and if
selected means the SSL-client must send the ZyXEL Device a certificate. You must apply for a
certificate for the browser from a CA that is a trusted CA on the ZyXEL Device.
Please refer to the following figure.
1 HTTPS connection requests from an SSL-aware web browser go to port 443 (by default)
on the ZyXEL Device’s WS (web server).
2 HTTP connection requests from a web browser go to port 80 (by default) on the ZyXEL
Device’s WS (web server).
Figure 147 HTTPS Implementation
"
If you disable the HTTP service in the REMOTE MGMT > WWW screen, then
the ZyXEL Device blocks all HTTP connection attempts.