ZyXEL Communications NXC5200 User Manual page 631

In the Certificate Manager dialog box, select the Web Sites tab, select the
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certificate that you want to remove, and then click Delete.
In the Delete Web Site Certificates dialog box, click OK.
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The next time you go to the web site that issued the public key certificate you just
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removed, a certification error appears.
NXC5200 User's Guide
Appendix D Importing Certificates
631