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user_fdo4sf
1st Topic

3 Messages

Wednesday, November 15th, 2023 1:04 PM

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xFi Gateway blocking communication between devices

So i've got multiple computers connected to the gateway via wifi, and up until a few days ago, everything worked fine. I use Remote Desktop from one computer to the other, in both directions.

Today, neither device can RDP, Ping, or Traceroute to the other. I can, however, connect from one of them to the other using a Moonlight/Sunshine combination.

The Moonlight connection works, so it's not a problem of the devices; both devices are online, both devices show up in the Connected devices list.

The xFi gateway is blocking communication on certain protocols, without my request.

What has changed, and how do I un-change it.

Question

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Updated 

1 year ago

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2

0

flatlander3

Problem Solver

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1.5K Messages

1 year ago

For a test, log into your gateway's admin interface at http://10.0.0.1   username/password == admin/password unless you changed it from the defaults.

Try disabling MoCA from the gateway web interface.  Then reboot your WiFi devices or otherwise drop the WiFi connection on them and reconnect.  See if it ping/RPC suddenly works again.  If it does, there's an easy permenant fix for it.

I don't think there's a "WiFi device Isolation" function on the Xfinity gateways, or at least one you can control.  You can try a hard power cycle (pull the power cord), wait about 30 seconds, and plug it back in, then see if that works too.   

1

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user_fdo4sf

3 Messages

Have disabled MoCA to test; interestingly, saving the setting and then doing a soft reboot results in MoCA being re-enabled. Saving the setting and doing a hard power fault keeps it disabled.

Unfortunately, no improvement.

1 year ago

0

XfinityOrlandoM

Official Employee

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2K Messages

1 year ago

@user_fdo4sf

this link https://www.xfinity.com/support/articles/port-forwarding-xfinity-wireless-gateway has great information to see if any port are blocked or how its set up, you also may want to jump onto the xfinity app and you can manage your devices and go to security for the  advance setting  

 

3

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flatlander3

Problem Solver

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1.5K Messages

@XfinityOrlandoM​  The OP was talking about RDP and ICMP connections/pings LAN-to-LAN.  Introducing a security problem by blowing holes in an external firewall with port forwarding isn't going to help this situation and is horrid advice.  

1 year ago

user_fdo4sf

3 Messages

Agreed with @flatlander3. This problem is on the LAN side of the gateway. Don't see how port forwarding is going to help. Or for that matter, why I would need to port forward *ANYTHING* inside my LAN. Your gateway should not be blocking communication between devices.

1 year ago

0

flatlander3

Problem Solver

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1.5K Messages

@user_fdo4sf​  Usually, the physical hardware either works or does not, or fails miserably enough that communication is almost impossible.

You could try temporarily disabling anti-virus and defender on windows to see if that's it, but devices should respond to a ping at least. 

Perhaps there is a firmware corruption.  You could try reverting to factory default if it's a firmware issue with a corrupt table, damaged flash part or inability to write to one.  Press and hold the WPS button until the lights blink or really old gear had a toothpick hole reset button you can hold down.  That's probably not it though, and consumer gear usually doesn't have a protected backup firmware image they can revert to if an update failed or got corrupted somehow.

If that isn't it, then hardware swap might be your next option.   If it's Xfinity rental gear, you don't care.  The quick way is to do that at an Xfinity store if there is one by you.  Or return it and just use 3rd party gear that works.  Save $14/month.

1 year ago

0

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