NAT (Network Address Translation) problems with games consoles
There are a number of issues, depending on which games console,
computer, or home hub version you are using, and whether you are
sharing an IP address with other users (GG-NAT)
You can tell this by looking at this diagram
If you are on CG-NAT, then you are going to have a lot of problems,
as people will not be able to connect to your machine.
You will always get Strict NAT.
This problem is mentioned here Unofficial
XBOX live Guide
IP address translation/sharing
of other issues can be overcome by
making sure you manually set a static IP address to your device, via
its own network settings screen, and
not relying on the home hub to do it. Then making sure that any port
mapping, is done to that IP address, and not the device name.
Also see this guide on the
one moderate NAT on Homehub 5
a static IP address on a Playstation Vita
a static IP address on the Playstation 3
a static IP address on the Xbox 360
Please read this guide first, on which
IP addresses to use.
Static IP addressed on the BT Home hub.
This link will give you a guide.
Port forwarding issues
There is also a thread on the main forum, where people have posted
This covers a number of consoles, PCs and home hub versions, so you
may have to read all the posts, to find a number
Any new posts relating to this issue, should appear on this common
thread, otherwise a forum search may help.