ZyXEL ISG50-PSTN User Guide - Page 679
User/Group, Authenticate Client Certificates
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Chapter 52 System Each user is also forced to log in the ISG50 for authentication again when the reauthentication time expires. You can change the timeout settings in the User/Group screens. 52.7.3 HTTPS You can set the ISG50 to use HTTP or HTTPS (HTTPS adds security) for Web Configurator sessions. Specify which zones allow Web Configurator access and from which IP address the access can come. 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 50 on page 643 for more information). HTTPS on the ISG50 is used so that you can securely access the ISG50 using the Web Configurator. The SSL protocol specifies that the HTTPS server (the ISG50) must always authenticate itself to the HTTPS client (the computer which requests the HTTPS connection with the ISG50), whereas the HTTPS client only should authenticate itself when the HTTPS server requires it to do so (select Authenticate Client Certificates in the WWW screen). Authenticate Client Certificates is optional and if selected means the HTTPS client must send the ISG50 a certificate. You must apply for a certificate for the browser from a CA that is a trusted CA on the ISG50. Please refer to the following figure. 1 HTTPS connection requests from an SSL-aware web browser go to port 443 (by default) on the ISG50's web server. 2 HTTP connection requests from a web browser go to port 80 (by default) on the ISG50's web server. Figure 451 HTTP/HTTPS Implementation Note: If you disable HTTP in the WWW screen, then the ISG50 blocks all HTTP connection attempts. ISG50 User's Guide 679
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