ZyXEL P-2802HWL-I1 User Guide - Page 257
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Chapter 19 Remote Management Configuration 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 applicationlevel 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. P-2802H(W)(L)-I Series User's Guide 257