Sure, the following thread is very similar to your problem. You should learn a lot from it. It states 18 minutes to read it but I would take a few hours to read it properly. Pay attention to the references about IPTABLES as it’s an area where lots of users simply ignore the references in Blynk’s local server docs.
In my opinion local servers are used far too often by networking novices and Blynk’s cloud servers should be server of choice.