Belkin: DHCP Reservation

After signing into the router, select Lan settings, the lease time can be set to forever. This is from the Belkin manual:

The length of time the DHCP server will reserve the IP address for each

computer. We recommend that you leave the lease time set to “Forever”.

The default setting is “Forever”, meaning that any time a computer is

assigned an IP address by the DHCP server, the IP address will not

change for that particular computer. Setting lease times for shorter

intervals such as one day or one hour frees IP addresses after the

specified period of time. This also means that a particular computer’s

IP address may change over time. If you have set any of the other

advanced features of the Router such as DMZ or client IP filters, these

are dependent on the IP address. For this reason, you will not want the

IP address to change.

Since that router does not have DHCP Reservation to automatically lock in the IP addresse of your Xbox as per

http://forums.xbox.com/xbox_forums/xbox_support/networking-hardware/02-routers/belkin/f/2897.aspx I would go to manual IP addressing on the Xbox.

Okay cool, so to recap, I should do this dhcp reservation step first before I go into the port forwarding step. And DO I have to hard wire my computer via Ethernet to the e4200 for this dhcp reservation while having my Xbox turned on and connected to the
e4200?

Thanks

Yes, the Zyxel is a gateway (modem+router), and you have problematic double NAT as a result. If you have access to the right settings, you can put the Zyxel in bridge mode as explained on page 22 of the manual here:

ftp.zyxel.com/.../P-660RU-T1%20v3s_1.01.pdf

This is the best solution, but your ISP may block those settings. If it does, and if it is unwilling to set it to bridge mode for you, another option is to disable DHCP on the Belkin and connect the Zyxel to a LAN port on the Belkin rather than WAN. Reboot
Zyxel, Belkin, Xbox, and Xbox should get an IP from the Zyxel via DHCP (reserve this IP if the Zyxel supports that). You will then need to do all necessary port forwarding to the Xbox using the Zyxel unless the Zyxel properly implements UPnP (in which case
enable that).

An open NAT is no guarantee that this behavior will be consistently open for each endpoint on your network.

Can you see if your router support DHCP reservation, or IP reservation. If so, setup both console's to have their IP address reserved in the DHCP of your router. Before you setup this, make sure you reserv a unique IP outside of the DHCP's dynamic IP pool
range.

Is there any chance you can try with a wired solution?