Accessing an Orthanc instance running inside Fedora/RHEL/CentOS

For remote access to Orthanc, you will have to open the 4242 and the 8042 ports on iptables, that are closed by default:

$ sudo iptables -I INPUT -p tcp --dport 8042 -j ACCEPT
$ sudo iptables -I INPUT -p tcp --dport 4242 -j ACCEPT
$ sudo iptables-save