ZyXEL Communications 802.11g ADSL 2+ 4-Port Security Gateway HW-D Series - Manual (Page 412)

P-662H/HW-D Series User’s Guide
412 Appendix G Importing Certificates
Figure 247 Certificate Import Wizard 3
6 Click Yes to add the ZyXEL Device certificate to the root store.
Figure 248 Root Certificate Store