try CWP webpanel they have all what you need including email server

or you can use this 3rd party website

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Hi rebuild and restart nodebb

hello you can create two separate vhosts for 80 and 443 and add redirect to htttps in http (port 80) vhost

rewrite ^(.*)$ https://www.$host$1 permanent;

or

return   301 https://$server_name$request_uri;

try CWP webpanel they have all what you need including email server

you just need to open this ports :

ssh port in/out better to disable root/user login with pass instead use the key

Http protocol ( it is recommended to not use nodebb port publicly ) in/out:

80
443

Email if you're using SMTP in/out:

25
465

try to rebuild and restart sometime it solves the issues.

can you mention the nodejs version and verify all ip connection via this command if you find some suspicious ip ranges:

netstat -an | grep :80 | sort

This is because probably you're in ddos attack, kindly opt for good ddos protection or use nginx and configure and block those ddos.