I have already gone through the tutorials and help files online I can find regarding how to fix the "failed connect to server" timeout. For example I have tried all settings under settings>>advanced>>Bind to IP; I have tried disabling Windows Firewall; I have tried both my closest geographic server and the auto-server option; and probably more I'm forgetting.
Interesting to note, I also did two quick things to rule out possibilities. First, I tried streaming with Twitch Studio which also failed on this computer. Second, I tried streaming using OBS from a Mac I have, and that was able to stream with default setting on the Mac no problem. So it doesn't seem to be router setting-related.
Any ideas? Thanks!