Tried everything, stuck with "strict" NAT

Malamear · Mar 29, 2014

So I started out with a "Moderate" level, but after trying everything now it says "strict". I enabled UPnP, forwarded all the listed ports in the sticky at the top. Added the Xbox to the DMZ, and now it's strict. I'm on a Linksys WRT54GS router that goes
through a female to female plug labeled cat.5e 1r72, to a PoE labeled TP-POE-24iR-CI, then straight out to the dish. I don't think there is a gateway, at least following the wires I don't see one.

:)

RyanRitterbusch ✔ · Mar 29, 2014

Strict NAT, Tried everything

tried everything, never had a problem with my 360

What Country/State/Province do you live in? USA,California

Modem brand & model number: No personal modem, just the ethernet outlet set up by my apartment complex

Router brand & model number: Cisco Linksys E900

Wired or wireless: wired

Things you have tried: putting xbone in dmz, port fowarding, switched the xbox off mode

Is UPnP Enabled? Yes

Do you have a NAT error? If so, what is your NAT type? Strict, "Your network is behind a port-symmetric NAT"

Any Error Codes you encounter: 0x40000000400000000

Who is your ISP?(Internet Service Provider): Cox Cable

jmcode · Mar 29, 2014

Strict NAT, Tried everything

Yes, if I am correct that you are behind a NAT router and firewall they are managing. If, as I understand, you are getting Internet via CAT5e/6 from the wall and do not have your own modem, then that is almost certain. You can verify by looking at the WAN
IP of your E900, as reported in its web interface. If it is a private class IP (see explanation at
whatismyipaddress.com/private-ip), then your E900 is behind another NAT router--presumably your complex-wide one. It may be very difficult to convince them to open ports for you, and what
if another resident with an Xbox One wants the same? A port can only be forwarded to one host at a time...

CliffyCarton84 · Mar 29, 2014

For more information on this subject follow this link and follow instructions.

support.xbox.com/.../network-ports-used-xbox-live

Malamear · Mar 29, 2014

I take it you did not fully read my post. "...forwarded all the listed ports in the sticky at the top...." means that I tried that already.

Malamear · Oct 31, 2018

I also noticed that my router is running in Gateway mode, this further leads me to believe that there is no gateway

jmcode

Yes, if I am correct that you are behind a NAT router and firewall they are managing. If, as I understand, you are getting Internet via CAT5e/6 from the wall and do not have your own modem, then that is almost certain. You can verify by looking at the WAN
IP of your E900, as reported in its web interface. If it is a private class IP (see explanation at
whatismyipaddress.com/private-ip), then your E900 is behind another NAT router--presumably your complex-wide one. It may be very difficult to convince them to open ports for you, and what
if another resident with an Xbox One wants the same? A port can only be forwarded to one host at a time...

RyanRitterbusch ✔

@Snakebit333 Tried what you said, but nothing worked :\

@GZA So basically I need to get in contact with my complex's IT and try and get them to open the ports on their end?

jmcode

It is likely because the Xbox 360 uses only IPv4. It does not have IPv6 support and does not use Teredo. The Xbox One fully supports IPv6, which is the future of the Internet (the supply of IPv4 addresses is pretty much exhausted). Because many ISPs and
other parts of the Internet infrastructure (including many or most home users' routers) are not yet IPv6 capable (or have a broken implementation), the Xbox One uses a transition technology called Teredo to tunnel IPv6 over IPv4. Unfortunately, Teredo does
not work in some setups such as symmetric NAT, double NAT, etc. Additionally, you have a problem in that your Xbox One is likely behind a symmetric NAT router over which you have no control--i.e. one run by your apartment complex. This means you cannot effectively
forwards ports, enable UPnP, put the Xbox in DMZ, etc. (doing so on your own router is ineffective assuming I am correct that it is behind your complex's router).

RyanRitterbusch ✔

same thing, strict nat when I plug it in from the wall. Its very frustrating I can chat with my friend in a Ghosts lobby, but when I join the Xbox Live party I can't hear him or it says "You can't join the party right now". 360 never had this problem don't
know why it would start now

MarkSelezenev

Dr ritter, check what you use in network settings on the xbone. Is it ipv4 or ipv6.

If its ipv6 than your router does have some sort of tunneling and its possible to turn of ipv6 actually. I checked it. Basically go to setup -> IPV 6 setup and at the bottom it has tunnel try to enable that, its pretty cryptic what it says there but I presume
its teredo tunneling. IF not try disabling ipv6 all together and then perhaps try DMZ again. Reply back with what happens please.

Tried everything, stuck with "strict" NAT