tnks, great job ! I'd be happy to help you too ;)
1 - yes , i have some open ports (443 for sshd, sip port for my gigasetA510 and another port for my ipcam) and "respond to ping requests from wan" set to yes
2 - yes only DLNA, SMB and itunes (no upnp, aicloud, nfs, ftp, http, mail, etc)
3 -...