By default Wildfly only binds to localhost (127.0.0.1), and is not
reachable via any external network interfaces.
Running in domain mode is an advanced Wildfly topic, so I suggest you check
Wildfly documentation:
https://docs.jboss.org/author/display/WFLY9/Interfaces+and+ports
https://docs.jboss.org/author/display/WFLY9/Domain+Setup
A quick way to bind to all the network interfaces in standalone mode is to
use -b 0.0.0.0 as a parameter to standalone.sh. But that doesn't work for
domain mode AFAIK.