Wifi trading/battling/anything issue.

[Superkid11]

SOLVED -Wifi trading/battling/anything issue. -SOLVED

While I'm able to get on Nintendo Wifi on Pokemon Diamond, whenever I try to battle, trade, or what have you with anybody it doesn't work. One of us gets an error message and gets kicked off. If I'm doing the invite, they get kicked off. If they do, I do.
Under the message is what I assume is an error code, which is 86420.
The first time I traded with somebody it worked, so this hasn't always been a problem.

I've verified that this is a problem on my end. I've tried to do this with two different people that have had no problems with anyone else. I tried turning off my firewall but that didn't help at all.
I can still use the Global Trading Center without any problems, I successfully got a pair of Pokemon from it the same night I discovered this problem.

Any ideas?

Edit: Problem solved, had to enable DMZ.

 

[TwilightBlade]

According to Nintendo the Error code is this:

Spoiler:

This particular error is typically caused by a firewall interfering with a successful connection to the Nintendo WFC. Please read the following information.

Do you receive this error every time you try and connect?
If you receive this error every time, please proceed to step #2 on this page.
If you receive this error only when playing a particular friend, then it is likely a problem with the friend's firewall settings on their connection. If possible, recommend to your friend that they visit the technical support area of www.nintendowifi.com for possible solutions.


Ensure your router has the latest firmware installed. Visit your router manufacturer's website and look for any updated firmware that may be available (these are typically found under "downloads" or by searching for your particular model number). Contact your router manufacturer for additional assistance.



If the above information does not solve your problem, you may consider adjusting your router's Port Forwarding settings*. Each router is unique, so consult the owner's manual for your router or contact the manufacturer for specific information on working with your router's ports. For your information:
If you are prompted for a device or profile name, you can enter anything you like (such as Nintendo DS, etc.).
The starting port to open is 1, the ending port to open is 65535 (or as high as the router will allow).
Protocols will need to be set to UPD only.
Set the IP address for the ports to forward to the same as the DS's static IP that you assigned in the previous step on this page.

If you are still unable to connect, please call 1-800-255-3700 in the USA or Canada for more information.

*While Nintendo provides this information for our consumers' use, it is up to each consumer to determine what security needs they have for their own networks, and to decide how best to configure their network settings to meet those needs.

So it's a firewall issue for sure... :O Your router must be blocking some people and allow others... I had this problem with abot 2 out of 100+people I traded with. How I solved the problem is get a third person to help you trade and use him as a sort of bridge... Maybe just both traders need to turn off their firewall?

 

[Deleted member 12729]

...I'll just move this over to Tech discussion since it suits it more than over here. =P But yeah, seems to be a firewall issue.

Moved~

 

[Superkid11]

I'd turned off my firewall when trading but it still didn't work... although I found out I was after the wrong firewall. :P LiveOnecare Firewall didn't regulate it, my router firewall did.

I just had to enable DMZ on it. It's working now.
Thanks. :)