Since they describe this as log-in issues, should we expect that to be a server using lots of UDP? Or do you think that the log-in service is hemmed in by the load on the game servers?
No, login in Fortnite is over 443 and it uses normal HTTPS.
It also uses HTTPs to load a lot of other data such as server data, friends list, chat etc.
Unreal Engine comes with a version of chromium built in which is used for many in game things like social tabs, news, and in game purchases these all work over HTTP/S.
Right, that's what I was guessing and am not sure why I was downvoted when everyone is confirming that contrarian's post doesn't really make sense since UDP isn't very relevant here.
It also uses HTTPs to load a lot of other data such as server data, friends list, chat etc.
Unreal Engine comes with a version of chromium built in which is used for many in game things like social tabs, news, and in game purchases these all work over HTTP/S.
Game data is sent over 5222 TCP.