Figure 551 Internet Explorer 7: Public Key Certificate File; Figure 552 Internet Explorer 7: Open File - Security Warning - ZyXEL Communications ZyWALL USG 300 User Manual

Installing a Stand-Alone Certificate File in Internet Explorer
Rather than browsing to a ZyXEL Web Configurator and installing a public key certificate
when prompted, you can install a stand-alone certificate file if one has been issued to you.
1 Double-click the public key certificate file.

Figure 551 Internet Explorer 7: Public Key Certificate File

2 In the security warning dialog box, click Open.

Figure 552 Internet Explorer 7: Open File - Security Warning

3 Refer to steps 4-12 in the Internet Explorer procedure beginning on
complete the installation process.
ZyWALL USG 300 User's Guide
Appendix D Importing Certificates
page 814 to
819