I will take this into consideration as a last resort - thank you. My intention was to be PC/Laptop free (except for setup of course). I like the system to be simple (like me ... hehehe). A person must just be able to switch on the PS3 and either play games, go online, watch a movie, play music or watch pics/photos (or whatever else the PS3 can do). I have decided to play around with the firewalls. I will not touch the firewalls on the router's side, but will see if I can adjust the firewall on the NAS. This worked for a guy with an older model Synology NAS.
UPDATE: WHOOHOOoooo ... I got it to work!!
The problem was the firewall on the NAS (seems like everything has a firewall these days). It turns out this NAS is much more advanced than I realized. As suggested, I changed a firewall setting in the NAS only. I enabled the DLNA/UPnP media server ports. What I don't understand, is why it did stream before the ports were enabled.
If the firewall is there to prevent the opening of ports prior to enabling it, I should not have been able to see anything on the PS3. But, at least my frustration is over. Thanks saviour07 and severusx for your posts. You guided me in the right direction.
The only draw-back of my wireless system is that the 1080 HD MTS videos do have an unacceptable level of lagging. This can be overcomed by either installing an ethernet cable or copying the movies to the PS3 and then playing directly from the PS3 and then delete it after watching it to preserve HDD space. I would probably gather some courage and get into the roof to do the cabling ... but not in the very near future.
PS: I can recommend this setup!!
I totally agree. I have read though that other NAS systems from Synology had similar issues and was sorted out.