Find the perfect gift for the grad in your life with Graduation gifts that connects us from AT&T.
NathanB's profile

New Member

 • 

8 Messages

Sunday, May 17th, 2020 7:26 PM

I can't Port Forward!

I am trying to set up a Minecraft sever for me and my friends, but port forwarding is much harder on AT&T's modems, and I can't seem to get it to work..

My model's number is BGW210-700 and I have tried everything. I know it's a problem with the modem because when I go to a port checker tool like this one; https://www.yougetsignal.com/tools/open-ports/ it says that the port is closed (I use the default 25565 host port) even though the modem website says it is open.

I have been working on this for around 4 days now, and have reinstalled the Server software, disabled firewalls, followed ALL the tutorials, so please don't just link me the first answer that's in the database.

Community Support

 • 

232.1K Messages

4 years ago

We can help, @NathanB.

Have you tried setting up the server, and are you having any problems accessing it? Is a device on your network going to be hosting the server, or is it hosted by a 3rd party?

Port listening or port scanning requests can get denied by our provided routers as a security measure, since malicious users can potentially use those requests to gain access to your network and/or devices.

If you haven't, try doing a hardware reboot on your gateway by unplugging it and plugging it back in.

Let us know if this helps, or give us more information so we know how to proceed.

John, AT&T Community Specialist

New Member

 • 

8 Messages

The server software is being hosted on my old desktop, and I know it is working correctly. I have been able to access the server on a different computer using the IPv4 address (without the 25565 extension). But my friends outside the network cannot get through the router.

The strange thing is, I've gotten this to work before, I just can't remember what the heck I did.

Community Support

 • 

232.1K Messages

Hi, @NathanB.

 

Have you rebooted the gateway?

 

We recommend that you reboot your gateway, because this will refresh everything.

 

Let us know if this helps.

 

Marc, AT&T Community Specialist

Still need help? Ask a question! Our 1.4 million members typically respond within 1 hour.

*I am an AT&T employee, and the postings on this site are my own and don't necessarily represent AT&T's position, strategies or opinions.

New Member

 • 

8 Messages

Yes! I've unplugged and replugged the modem, held the reset button, and even did the reset through the online portal.

Community Support

 • 

232.1K Messages

Hi @NathanB, we are happy to help.

 

We have some great support articles on setting up Port Forwarding.

 

Also, configuring IP Passthrough and DMZ PLUS.

 

This configuration is often suitable for a customer desiring to connect third party equipment for networking, such as a router, to the AT&T provided gateway. IP Passthrough is also commonly used as an alternative to using a bridged mode. 

 

 

Hope this helps!

 


Lafayette, AT&T Community Specialist

 

 

 

Still need help? Ask a question! Our 1.4 million members typically respond within 1 hour.

*I am an AT&T employee, and the postings on this site are my own and don't necessarily represent AT&T's position, strategies or opinions.

New Member

 • 

8 Messages

It did not help.

New Member

 • 

7 Messages

4 years ago

A port scan may show the port is open, but the server on the opposite side may not be communicating back out.

AT&T's black box is such a clunky piece of disappointing software. You have your port forwarding setup correctly,

***BUT***

1) - You need to make sure that your device declaration "MCPC" as setup in the RG has an IP that matches what the MCPC's current IP address actually is. Chances are, unless you setup your "server" with a static IP address, the DHCP lease was reset and your MCPC has a different IP address from what is setup in the RG.

2) - I'm assuming MCPC is a Windows computer. You need to make sure the Windows Firewall has enabled that port and is allowing it in on all networks. I don't think this is an issue since you can get it to work from the LAN side of things, but just double-check.

3) - You don't need IP passthrough. Port forwarding is all you need.

New Member

 • 

8 Messages

@MisterBaz who knew the best reply wouldn’t be from an employee. Thank you. I have disabled all the firewalls for right now in till I could idientify the problem. As for step 1, I don’t know what an RG is. And was wondering if you had a guide to what ever you suggested.

New Member

 • 

7 Messages

My bad, the "RG" is what AT&T calls the "Residential Gateway." Basically, it is the BGW210 "black box" modem/router/whatever-you-want-to-call-it that you are configuring.

I would first take note of the IP address of your minecraft server, then check the BGW210 and make sure the "MCPC" device declaration in there has an IP the matches.

I don't have a guide, sorry.

EDIT: Taking a third look at your screenshot, it looks like it was throwing a flag stating that port wasn't open on 192.168..... meaing the BGW210 was checking the IP that "MCPC" was referencing and stating that port wasn't open.

(edited)

New Member

 • 

8 Messages

The modem doesn’t show the IP of the device you’re connecting it to. I’m still not sure how to use the information you gave me to fix this.

Not finding what you're looking for?
New to AT&T Community?
New to the AT&T Community? Start by visiting the Community How-To.
New to the AT&T Community?
Visit the Community How-To.