Bt home hub change my nat from strict to open

PS3

You will have to open the following ports in your BT router
Make sure the firewall is disabled in the Router


Playstation Network Required Ports

TCP 80
TCP 443
TCP 5223
UDP 3478
UDP 3479
UDP 3658

Playstation Online Game Ports

Call of Duty 3:

UDP 3074
TCP 3074

MotorStorm

UDP 3659
UDP 3660

You can use http://whatsmyip.org/ports/ to test if the ports are open.

There are ISPs that block utorrent. I found this explanation of how to do port forwarding on the BT home hub, though: http://portforward.com/english/routers/port_forwarding/BT/BTHomeHub/Utorrent.htm
So, all I can suggest is to open the ports on your home hub as suggested above and to connect your computer straight to your home hub rather than to your CWR-854 (unless you actually have no such router and just picked that to ask the question under).
It is possible that someone has decided that you should not use torrents (they slow down everyone because they actually have the nerve to use the internet) and they are associated with thieves. Not to mention that there are tons of legit uses for them,
This could be someone in your ISP or your house. So do you have access to everything? You can poke around with telnet - can you access the ports on the other systems that utorrent accesses to make itself part of the network of systems that are downloading and sharing the torrent?
But if one knows the ports it is easy to block torrent.
If you have multiple routers that do nat, the home hub has to forward to your router, not to your system. So if your router is 192.168.3.12 and your system is 192.168.5.6, the BT home hub has to forward to the port on your router, on 192.168.3.12 , and your router has to forward to your system on 192.168.5.6. If the home hub tries to forward directly to your system (if you have multiple routers, which you might have because of the way you asked your question) then it won't work since your router hides 192.168.5.6.

You will need to change the settings of the router.
You will need to open the router set up page and change the settings.

Reduce the MTU to 1365

open ports for the X-box.

Click Here for more details about xbox and home network

This router does not have the typical "strict or open" NAT types. Looking at the manual, it looks like what you want is NAT enabled and SUA only enabled.

http://www.zyxel.com/web/support_download_list.php?indexflag=20040906173729&ModelIndexflags=0,420041221102511,420041221102520,420050117110858,420050117110916,420050117110934,420050831093216,420050831095441,420060420160946,420060420161739,420060816160116,420080815092146,420090427144843

Page 133 has the details.

Log into router
go to the NAT tab
Enable NAT
Enable SUA only
Apply the change.

You need to do port forwarding on your router. First, you must setup a static IP address on your XBOX. Then You must open these ports on your router setup page using Port Forwarding feature. 80 TCP and UDP, 53 TCP and UDP, 3074 TCP and UDP.

The easiest way to fix this is to replace your router.
Here is a list of routers that are Xbox approved
http://www.xbox.com/en-US/support/connecttolive/xbox360/homenetworking/equipment.htm

The model you mentioned that you have is not on the approved list from Microsoft.

Here is the problem behind your Xbox connection

http://www.xbox.com/en-US/support/connecttolive/xbox360/connectionmethods/troubleshootliveconnection-testnat.htm

If you call microsoft, and tell them that your NAT is strict, they will tell you specific ports you will need to forward. (For Free). If you arent sure how to forward ports, call up your routers manuafturer, or send me another message. I have forwarded my ports as well.

Reinstalled software that came withrouter and went thourgh the reconnection steps.
Now the NAT is set to open.

is teh ip assigned static on teh pc or in the router

if its in teh router then login to the router and home and click on wan and change it to Dynamic IP Address and click on apply and reboot thats it if its working rate me solved