So I was able to turn my PS3 on via the Remote Start function on my Vita (at home), but I have'nt had much luck connecting the two outside of my homes wi-fi network. I've tried the wi-fi from my friends home, but unfortunately I still wasn't able to establish a connection. And I do have Remote Start enabled on my PS3, so I'm not really sure what else is there to do. Can somebody give a clear, simple explanation if I need to tweak my router settings, or whatever, to get this working.
I have had no issues since using the settings in this thread. I am still able to connect to my PS3 home, even using an iPhone wifi tether (it's laggy as all get-out for games, but at least I can do basic things on my PS3 from anywhere).
Basically, it is tweaks to your home network (setting your PS3 network IP address outside your DHCP range, fiddling with UPnP settings, etc). My setup is a UPnP-enabled router behind a non-UPnP-capable gateway, so I wonder if turning UPnP OFF might actually allow for easier RP connections (using port triggering/forwarding instead). Putting your PS3 on a DMZ would allow for easy connections, unfortunately, with just a simple single router DMZ, any random internet noise will wake up your PS3, eventually causing it to shut off remote start via internet.
Most ISP's do not allow DMZ on residential accounts. I know Comcast and Charter do not. You have to have a business account.
How can an ISP control how you set up your home network? The ISP only provides the service INTO your house. You should have full control over every setting within your home network. Every residential gateway I have used has had a control panel where it's had an option for a DMZ of some sort.
If your ISP is controlling how you use your internet (as long as your use falls within federal, state and local laws), you need to dump them at your first opportunity.