ISY-99i/ISY-26 INSTEON:Internet Explorer SSL Certificate Install
When you use Internet Explorer to remotely connect to your ISY it will open a warning about the self-signed certificate. You will have to click the Continue link to open the page. This will happen every time you use IE to access your ISY unless you Install the certificate in IE.
On the top of the page there should be a red shield that says Certificate Error. Click that, then View Certificates. In there you will find an Install Certificate button. Click that, then follow the instructions, and place the certificate in the Trusted Root Certification Authorities store.
Once installed, close the browser, reopen, browse to the ISY and IE should not give any more warnings.
The procedure should be the same for IE7 and IE8.