Well, like I said, not got any complete game examples. There might be an article out there, but generally MMORPG, Battle Arena, or more conventional FPS/RTS/etc. that host centralised servers I expect will have these things purely internally and not show much to the outside world. If you look at say Valve's offerings, the dedicated servers available to players are far less featured than the overall system that powers say CS:GO and Dota2 (e.g. all the ranking stuff, player reporting, support tickets, etc.,).
As far as general control interfaces go, well basically any piece of modern network gear has a web portal. You probably used one on say your router. A lot of IP Phones (common in offices so they can just have a single ethernet network) also have such an interface, as well as firewalls, email gateways, switches, etc. And the majority of web related server software you install these days will as well, such as forums, bug trackers, .etc.
For managing support tickets, both technical ones / bug tracking, and just general customer support there are various off the shelf services that can be used. For Warframe uses zendesk (https://digitalextremes.zendesk.com/hc/en-us), which you thus could get and take a look through from an admins perspective. I am sure some games also use fully "rebranded" ones, or at least their own customer facing user interface, while others simply use a forum for such things.
A lot of these user based platforms also have the ability to integrate with external software/databases for the purpose of user profiles and logins, commonly called SSO single sign-on (so I can use my single user account/password, to log into say the game, the forums, and the support desk), so you could see how some of them are doing that (e.g. quick search found https://support.zendesk.com/hc/en-us/articles/203663826-SSO-single-sign-on-options-in-Zendesk see "enterprise single sign-on section").
For GUI consoles, on commons ones on Window's I can think of is the Server Manager, Group Policy, and SQL Server management tools, but I only used them from a basic developers perspective, I am not an admin.