Other people can't connect via the external IP. However, I can connect via the external IP just fine. Hamachi also does not work. I have tried this on 2 separate networks (both Spectrum).
Server console:
https://imgur.com/a/H3VTAkA
netdebug:
https://hastebin.com/diduxahoki
I am using a Windows computer. Router model number is "R6300v2", router firmware version is "V1.0.3.6_1.0.63CH". Have made exceptions in Windows Firewall, and tried disabling Windows Firewall/Defender entirely. This is a home network. There is only one router and no network switch at the moment.
I think it has something to do with the software on this computer but I don't know exactly what that might be.
I have tried hosting a web server as well and it works fine, so the problem is specific to Intersect