Dell SonicWall SRA 4200 Administrator's Manual page 400

Web browsers are programmed to issue a warning if the above three conditions are not met
precisely. This security mechanism is intended to ensure end-to-end security, but often
confuses people into thinking something is broken. If you are using the default self-signed
certificate, this error will appear every time a Web browser connects to the SRA appliance.
However, it is just a warning and can be safely ignored, as it does not affect the security
negotiated during the SSL handshake. If you do not want this error to happen, you will need to
purchase and install a trusted SSL certificate onto the SRA appliance.
2.
400 | SRA 6.0 Administrator's Guide
I get this message below when I log into my SRA appliance – what do I do?
Answer: It's the same problem as noted in the previous topic, but this is the new "improved"
security warning screen in Microsoft Internet Explorer 8.0. Whereas before IE5.x and IE6.x
presented a pop-up that listed the reasons why the certificate is not trusted, IE8.0 simply
returns a generic error page which recommends that the user close the page. The user is
not presented with a direct 'Yes' option to proceed, and instead has to click on the
embedded Continue to this Website (not recommended) link. For these reasons, it is
strongly recommended that all SRA appliances, going forward, have a trusted digital
certificate installed.