As an alternative you can use the now free cloudflared which is usually more performant than ngrok
The setup is similar to ngrok.
- Download cloudflared Releases · cloudflare/cloudflared · GitHub
- Open cmd and cd to the path of your cloudflared and run command line
cloudflared tunnel --url http://localhost:5000
and you also get an address you can access your ob2
Oh and something more individual:
If you have a cloudflare account with a domain, you can even use an own subdomain
for that you have to login once on this computer with
cloudflared login
browser window should open where you can login to your account and select a domain
(or if you have a system without a browser, then copy the url you get and login there)
and then you can do like this, if you have mydomain.com on cloudflare:
cloudflared tunnel --hostname ob2.mydomain.com --url http://localhost:5000
Cloudflare then creates a new DNS entry where you can access your OB2.
(This entry gets deleted 24-48h after you shut down the tunnel.)
Of course you can do even more fancy stuff with that tool. - like run it as service, have ingres rules and much more.