6. After editing the files using telnet run this command
if you need to access your dreambox from remote location go to your router firewall settings and open port range 7020-7025
7. reboot your Dreambox and using Filezilla connect using ftp port 7021
8. go to /var/etc edit services file and change telnet port
save and reboot
Please apply these settings only if you know what you are doing otherwise you will need to flash your box using Dreamup since factory reset will not revert to default ports or you can use "vi" commands to edit files to default ports.
For your safety it is highly recommended to change the following tcp ports