Hello,
Base 8.1 has certain ciphers it accepts, and others it flags as illegal.
Most recent browsers have an issue with 8.1 base (fixed if you go to 8.1 sp1 patch 2 or higher) since the browser companies are trying to protect you from SSL vulnerabilities discovered in the past two years and now do not negotiate all the ciphers they used to 'back in the day'.
The easiest thing to do is find a copy of FirefoxPortable below version 36. This doesn't install, it just runs from an exe, but FirefoxPortable 35 and lower will work, and then with it you can install sp1 then sp1 patch 15, which fixes the cipher issue. Otherwise you can try to find a setting for your browser that will work. But the underlying issue is most current browsers are trying to protect you from certain SSL vulnerabilities... and even though 8.1 is no threat, the browser is not letting the connection happen (actually it is 8.1 refusing to negotiate the session).
Of course if you find and download FirefoxPortable, scan it and be sure it is a 'trusted source'. I am not recommending FirefoxPortable for any reason other than it is typically bundled by version number so it's relatively easy to just get a copy and quickly patch 8.1.
Also, FYI
these are the possible URL's for 8.1/8.2
Most require the FQDN only.
Ops console will allow both IP or FQDN.
security console
https://f.q.d.n/sc
https://f.q.d.n:7004/console-ims
self-service console
https://f.q.d.n/ssc
https://f.q.d.n:7004/console-selfservice
operations-console
https://f.q.d.n/oc
https://f.q.d.n:7072/operations-console
https://ip.address/oc
https://ip.address:7072/operations-console
