USG; "Continue to this website" doesn't work in IE9
When accessing the USG's (I have 20W) web interface via https IE9 complains "There is a problem with thie website's security certficiate." Clicking on the option "Continue to this webste" only results in refreshing the window, not continuing to the router's WWW interface.
MS recently released a security update to IE9 which won't allow it to connect to sites with a certificate with a key length of 1024 or fewer bits. (The default setting when creating a certificate on the USG 20W is 512.) If you have this problem it could signify that the server certificate in the USG has a key length of 1024 or fewer bits. (The default certificate in my 20W has a key length of only 1024 bits.)
The easiest way around this is to connect to the GUI via the HTTP instead of HTTPS protocol (or use a different browser which won't balk at the security certificate.) However, I have included steps below to actually correct the problem, to be used especially if the "Redirect HTTP to HTTPS" setting (Configuration -> System -> WWW) won't allow you to connect via the HTTP protocol.
Create a new self-signed certificate via the USG (Configuration -> Object -> Certificate) with a key length of MORE THAN 1024 bits. Export the certificate (only) then import it into the Windows certificate store. (certmgr.msc) Set the new certificate in the USG as the server certificate (Configuration -> System -> WWW).
The only reason I ever exported/imported a security certificate in the first place was simply because I got tired of the message in screen in IE about the problem with the website's scurity certificate and the resulting red color in the IE address bar, so I doubt this will be an issue for most users. But I thought I'd post just as an FYI in case the same thing happened to someone else.
»Re: USG 200 Invalid Certificate with Web Interface
I was just thinking... It sure would have been nice for MS to be a bit more descriptive with that error!