Question about Arris SURFboard SBG900 Wireless Router (DHSBG900)

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NAT type is strict and I need it Open for my Motorola SBG900

I need an Open NAT type for my Motorola SBG900 modem. It is set to moderate at the moment

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Firstly what you need to do, is go here: - Free Help Setting up Your Router or Firewall

And choose your router. On the page, look at the first couple of steps. It will tell you to enter an IP address into your browser (ie and then enter the username and password. Do that until you get to your router settings. Stop following that guide afterwards, because it's for port forwarding and not DMZ'ing.

Once you're in the router settings you need to find the "DMZ" page. Have a look through the menus -- it's probably under "Security", "NAT", "Gaming and Applications" or something like that.

You will know you've found it when you simply see a box to enter in an IP, and sometimes a check box saying "Enable". When you find the box, enter into it. That's it, just save if you can.

Easy eh? Not finished just yet though. Now you need to go to your Xbox. Go to the last blade, the settings one, and choose Network Settings. From here choose Edit Settings and choose IP Address. Set it to manual and use these settings:

IP Address:
Subnet Mask:
Default Gateway: Use the IP address that you typed into your browser to get your router settings up. Normally

Now try to connect. Your NAT should be open. If it isn't, restart both your router and Xbox 360.

I typed this really quickly, so if it's confusing in any parts just let me know. I can post how to port forward too if anyone wants, but DMZ'ing is far more effective and easier.

If your DNS fails then do this:

Go to Start > Run and type "cmd". Then type "ipconfig /all". Take a note of your Primary DNS in there.

Then go to your Xbox, settings, network settings, edit settings, DNS Server, manual and use:

Primary DNS: whatever you took note of from ipconfig /all
Secondary DNS: not needed.

Posted on Feb 04, 2009


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I need to change my NAT to open. It's on moderate right now. I have a Motorola Surfboard SBG900 router/modem.

first if your on windows click start goto run type in cmd and hit enter
then if your directly connected to this router/modem with nothing else in between it type ipconfig /all
you'll get 19x.x.x.x number or something like it under default gateway write it down and then open your web browser. Type in that address into the navigation bar and hit go or hit enter.
You'll get a motorola login screen.
By default factory settings the un/pw should be admin / motorola when logged in goto administrator if it's possible. Then enable UPnP and apply these settings or save.
Otherwise if your behind a router that is in between the motorola modem and your PC. do the same thing start > run > cmd > enter> black box and type ipconfig /all goto the default gateway here enter your un/pw for your router and goto administrator again enabling UPnP.

Mar 07, 2011 | Arris SURFboard SBG900 Wireless Router...

1 Answer

I need to make my Nat type open instead of moderate. How do I do that?

I just opened my NAT type to play xbox live...using a SURFboard Motorola.
And this site helped me alot:

but watch this video first, cause it will help out allot too:

With these guides, and bit of web reading from other peoples FAQ's.. I did it.

The guide you need will depend on what modem/router you have.

Good Luck

Jan 13, 2011 | Arris SURFboard SBG900 Wireless Router...

1 Answer

Xbox 360 - Thomson Router TG585 v8 Strict Nat limits who you can connect to. As you can imagine this creates a problem when trying to connect to friends. Kindly, devliver a simple step by step on how to...

OK, i too have had this problem and i have solved it via this website. This thompson modem is also referred to as... o2 wireless box II/III the website link is
Search for the specific (o2 wireless box II/III) modem and follow tthe simple instructions onscreen.

Jan 01, 2011 | Video Game Consoles & Games

1 Answer

How do i open my NAT type? i have moderate NAT type and i wish to open it, how to do so?

login to the router and enable uPnP - it should be on the security screen. if you don't have uPnP as an option you will need to use port forwarding rules. These depend on the application reporting the moderate NAT.
Let me know if you need further details on how to get into the router.

Dec 18, 2010 | Arris SURFboard SBG900 Wireless Router...

1 Answer

My SBG900 router's NAT type is set to moderate when checked on xbox live connection, I tried typing the IP adress into a web browser and can only get to the log-in page, I read that the log-in is naturally...

Try user as "admin" and passwords as "admin" or blank or "password" or "1234" then check. If still not able to access then you need to RESET it. For that press RESET button for 10 seconds reset button is in the back side of router. Then check. Let me know if you need further assistance. Thanks for using FixYa.

Aug 03, 2010 | Arris SURFboard SBG900 Wireless Router...

1 Answer

My Motorola modem says that my NAT type is set to strict and i would prefer to be on open because i cant play online games while it is strict.

just the ISP service local has the password for the modem ask they for change the settings for playing games online

Jul 27, 2010 | Computers & Internet

1 Answer

My NAT says strict. how do i get to moderate

Why are trying to change your NAT. SOME ISP'S wont let in there modem's anymore. to go there you really need to go to there web site.


Feb 19, 2010 | Arris SURFboard® SB5101 Cable Modem

1 Answer

Nat Is Moderate

It should already be set... Make sure in parental setting it is not blocked.
Good luck.

Jul 14, 2009 | Arris SURFboard SBG900 Wireless Router...

1 Answer

Change NAT to open

You need to call xbox live tech support. From there they will give you a code. This code will need to be entered in the settings for you wireless interenet product under "Port range forwarding."

Dec 28, 2008 | Arris SURFboard SBG900 Wireless Router...

1 Answer


go to
configure>gateway>lan>dhcp leases
now find your xbox 360 ip address and edit it so it bypasses the firewall. once you do that you can enable that ip address is dmz gaming. if you have any questions, my gamertag is wanderjahr and i'll help you

Dec 26, 2008 | Arris SURFboard SBG900 Wireless Router...

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