I would like to try Fop2 before buying the license but I find the problem that when I enter ip / fop2 it shows me the error "Connecting to server, attempt number".

I opened port 4443 on my Elastix server and did several tests with this result:

iptables -vnL | grep 4445

Result:

0 0 ACCEPT tcp - * * 0.0.0.0/0 0.0.0.0/0 tcp dpt: 4445

netstat -lnp | grep 444

tcp 0 0 0.0.0.0:4445 0.0.0.0:* LISTEN 3754 / fop2_server

Can anyone guide me? Apparently everything is correct, Fop2 is only activated if I deactivate my firewall