If it is set up correctly you will be warned about security but you can then access the unsecured web page.
You are probably missing a few steps, either the ports or the security.
Chrome and now internet explorer just say The page cannot be displayed nothing about unsecure page or something. However you mentioned something else to try which I not did before so I will try. It just seems I know too little to make this simply working.
Update: just did your reroute suggestions: did not help…Why do I not see a reroute for 7443 like you mentioned in your login link https://[IP]:7443/admin ?
Because it should work like this if you go to that webpage. I’m not even sure why you would want to redirect ports. Normally you would just assign your server other ports (but I’m not sure if that is possible with Blynk server as it is).
I believe the iptables are for other features within the server like the API, QR codes etc.
Port 7443 is hard coded in the server.
Did you go through the certification?
For local servers you can’t have proper certificates, even free Lets Encrypt certs as they need to be tied to a domain. But the docs do cover self signing certs with openSSL etc.
Re-assigning those ports with IP tables happens on a local level. So if you redirect 443 to 8443, it just means when you go to the server on 443 port, it will redirect you to 8443. I still don’t understand why you would need that. It’s just useless to do, unless your application on the other end cannot talk to Blynk server on non-default ports. In all other cases this is only confusing.
And you can definitely have proper certificates for your local blynk server, provided you own a domain name and set everything up properly (which is a hell of task, I’ll be the first one to admit that ).
@Lichtsignaal@Costas
I have the whole thing running now, using local server my robot can be controlled with my (cloned) blynk app!
Do I really need that admin page? Because I can not reach it no matter what I do, certificates is not something I know anything about. And I was a Kickstarter backer so I have a large amount of energy/credit for blynk sketches I imagine more then I need in a lifetime
The easiest way is to copy from github repository. I just grabbed the source files (zip) from github, and found inside server.properties file (there are more than one, though) Then modified it for my needs.
Just type nano in the terminal window, it will open up a editor with a blank document - then add things like this to yours - The server.ssl stuff might be optional unless you figured out how to generate your own certificates… took me ages to stumble around that one