Slirth

Alright strap in because I've searched everywhere on the internet to get this server working and nothing is working. Ok: I set up my Forge server normally, I port-forwarded my server on my Arris modem using the correct ip address, gave my friends my public ip adress to connect, it worked for a day, stopped working after a day because my ip address is dynamic, tried setting up a static ip, discovered this was not possible with my modem, tried using hamachi instead, i set up a network, friends were able to connect to the hamachi network, they were not able to connect to the MC server using the ipv4 address provided by hamachi, I tried setting "severip=" in the server properties file to the same ipv4 address, I received the "UNABLE TO BIND TO PORT" error, I tried changing the server port in the server properties file to something else, still received the same error, I check my firewall settings in my control panel, everything from minecraft to hamachi and java is allowed through, I tried portforwarding and using hamachi at the same time, still did not work, I'm at a loss here people.