Help: D-Link DSL-502T/D-Link DI-524 modem/router having issues with NAT settings on XBox Live

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notoner

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#73404 13-Dec-2010 21:56

Hope someone can assist me with this conundrum as I have looked online but to no avail:

I have a XBox 360 Slim and have been able to connect to the Xbox Live network with the exception of "moderate NAT" settings. As it connects online and not affecting gameplay (I am on XBox Live Silver/Free), I haven't been bothered with it.

However, when I recently tried to use my 48 hour gold trial to play online, I couldn't connect to my friend's game because my router or modem has "moderate NAT" settings. I looked online on how to fix this, and was referred to portforward.com and it ran through on how to open ports (UDP/TCP 80, 88, 53 & 3074), but it still doesn't seem to work. I think it may be an issue with my router/modem combo (I have a D-Link DSL-502T modem and a D-Link DI-524 wireless router), but I don't know how to open NAT on my modem. How should I set up my router/modem so I can have "Open NAT" setting on XBox Live?

I've tried to use DMZ, set up virtual servers, everything. But the last time I tried I couldn't connect to the internet at all so I'm worried I'll stuff up again.

Below are my modem/router ips:

modem: 10.1.1.1
router: 192.168.0.1

I read online that I may need to bridge my modem/router, is this true?

Cheers,

RunningMan

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#416883 14-Dec-2010 07:40

notoner:
Below are my modem/router ips:

modem: 10.1.1.1
router: 192.168.0.1

I read online that I may need to bridge my modem/router, is this true?

Cheers,

Those IPs are in different private subnets, which suggests both the modem and router are doing NAT. Two lots of NAT can get confusing, so it would probably be better to have one running in bridge mode instead.

cyril7

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#416892 14-Dec-2010 08:16

Hi Tony, dont try half bridge the modem, its a messy option, instead bridge the 524 which is a lot more straight forward.

First connect to the lan port of the 524, go into the web interface and turn off the DHCP server, and save that settting. Then change the LAN IP address (not the WAN) to something in the same subnet as the modem to make it accessible, so change the LAN address to say 10.1.1.250 with a subnet of 255.0.0.0 to match the modem, if it asks for a gateway then set that to 10.1.1.1

As soon as you set that you will loose contact with the 524 as it will be in a new subnet. So now connect your PC to the modem and connect the 524 to the modem via one of the 524's lan ports, not the WAN port, you should now be able to access the 524's web interface on 10.1.1.250 and the modem on 10.1.1.1.

You have now removed the double NAT and all the LAN ports of both the modem and 524 and the wireless interface are on the same layer2 net.

Also note as soon as you change the above the network will have a new address range supplied by the modem ie 10.1.1.X this applies to both wired and wireless connections so you may need to do a repair on all network connections to get fresh addresses

Cyril

notoner

17 posts

Geek

#416908 14-Dec-2010 08:58

Hi, thanks to both for the reply. I'm curious about the below comment though:

"As soon as you set that you will loose contact with the 524 as it will be in a new subnet. So now connect your PC to the modem and connect the 524 to the modem via one of the 524's lan ports, not the WAN port, you should now be able to access the 524's web interface on 10.1.1.250 and the modem on 10.1.1.1. "

My modem has only one network port, so how do I connect my PC and my router to my modem?

cyril7

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#416911 14-Dec-2010 09:08

Hi Tony, sorry was thinking it was a 4port modem, so nothing changes except that after turning off the DHCP server and changing the 524's IP address to 10.1.1.250, then move the connection between the modem and router from the wAN port to one of the LAN ports, then carry on as mentioned.

Cyril

notoner

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Geek

#416941 14-Dec-2010 10:08

Thanks for your message, so to clarify: I need to plug my PC and my modem into my router after I have changed the ip address of the router to prevent double NAT?

cyril7

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#417015 14-Dec-2010 12:13

Hi, leave it all connected just as original in the first instance, turn off the DHCP, then change the IP address, while it restarts move the connection to the modem from the WAN port to the LAN port, and obviously your PC would be connected to one of the router LAN ports as original.

By not using the WAN port but rather the LAN port then you will stop double nat'ing, however to make it all work and not have problems the routers DHCP server must be off so only the modem provides DHCP service. Further changing the routers LAN IP adress makes it accessible on the modems subnet.

Cyril

notoner

17 posts

Geek

#418775 18-Dec-2010 10:56

Hi, thanks for your reply. I have just tried to do what you have asked but the 524 router will not let me change the subnet mask to 255.0.0.0.

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notoner

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#418780 18-Dec-2010 11:14

Hi, I have changed both the subnet masks to 255.255.255.0, but what do i set my default gateway and my default/alternate DNS server to on my pc?

RunningMan

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#418789 18-Dec-2010 12:25

If you still have DHCP turned on in your modem, just set your PC to use DHCP for it's network setting, and it should automatically fill those spaces in for you.

Alternatively, the default gateway would be your modem's IP address (is it still 10.1.1.1?), and the DNS servers would generally be supplied by your ISP.

cyril7

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#418883 18-Dec-2010 18:47

Hi, your PC should be set to automatically get and IP and DNS, the modems DNS server will provide all the details when the PC and modem do a DHCP tango, the real issue is that there is only one DHCP server in the network.

Previously you were double nat'ing, so the modems DHCP server was not seen by your PC or any other LAN device connected to the router, now by bypassing the NAT router in the router (ie not using the WAN port) then you must turn off the DHCP server in the router otherwise two will exist in the network and cause a clash.

Cyril