I'm not sure if this is right, but try looking in /etc/wfe/conf and look in a file called itf.conf - look for the interfaces and look to see what "status = " lines look like. Mine are all up, and are status = 1 so if yours are status = 0 then change them to 1 and save the file. IIRC, the system will bring the interfaces up automatically, as it will think you have changed it in in the web front end.
Thanks Oldeda. I have already tried ifconfig eth1 up but it go up without ip and i can't arrive to my gui page to manage UTM, like above. Other suggestions? Regards, Alessio