ZyXEL Communications NSA-220 Plus User Manual page 355

In the Install authority certificate dialog box, click Install.
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Figure 195
Next, click OK.
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Figure 196
The next time you visit the web site, click the padlock in the address bar to open
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the Security information window to view the web page's security details.
NSA-220 Plus User's Guide
Opera 9: Install authority certificate
Opera 9: Install authority certificate
Appendix D Importing Certificates
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