Periodical DNS issue, 360 sending blank queries

Background Info:

First off, to preface things I live in south Florida and have Comcast for internet. I live with a roommate, between us we have three Xbox 360s but generally only two are running simultaneously. It is worth noting that we are both network engineers by trade,
so we have access to troubleshooting tools that most users do not.

The Symptoms:



Occasionally, one of our 360s can't connect to Xbox Live. It's almost always a DNS error. Most of the time the other Xbox 360s can connect fine while one stubbornly refuses to. One is set up through wireless, the other two are wired to the network. All
seem to be vulnerable to the same issue.

We've tried setting up everything with a static IP, manually inserting DNS servers (generally 8.8.8.8), reset to factory defaults, power-cycled the hell out of everything... yet still, when one of the 360s is having DNS errors... nothing seems to help. It
just randomly starts working again when it feels like it.

The Current Situation:

So, tonight it started happening again to the 360 in my room. As per usual, we set it up with a static IP, set manual DNS, power-cycled... all to no avail. It's been at least 90 minutes since we've been messing with it. It connects to the home network
with no issues, I can even connect to our home media server in Windows Media Center just fine. It just refuses to connect to the internet.

As we were wondering what the hell it was doing, my roommate logged into the network monitoring on the Juniper firewall that the network runs through before hitting the modem and watched the 360 make requests.

IT'S SENDING 0-BYTE DNS QUERIES!

As you may imagine, we were both a bit puzzled by this. We haven't tapped the network to get a PCap yet, but will probably do so tomorrow so I can post it in the thread as well. (And just out of sheer curiosity if nothing else)

Is this an issue that you guys are familiar with, and is there any workaround or fix for it?

:)

 

How much should i sell my xbox 360 plus controllers, Kinect and hard drive

Where the hell are you selling?

https://phoenix.craigslist.org/search/sss?query=xbox 360&sort=rel

Shit here apparently is cheap, i personally sold my 360 to a guy at work with a wired controller, halo 4, and gears for 100.

 

HBO GO not working on Xbox 360

It's a DNS issue. I fixed it by manually the DNS servers on the Xbox 360. I used Level3's public DNS servers:

209.244.0.3

209.244.0.3

As described here:

www.reddit.com/.../hbo_go_not_working

 

Greetings!

How many devices on your network are actively performing NAT?

TIA!

 

The firewall is the only thing performing NAT in our network.

 

May I ask, do you receive a DNS error message through your console, or do you exclusively use the monitoring tool on the juniper firewall, to determine this behavior?

When you say "It's sending 0-byte DNS queries!", are you able to see any activity on port 3074 from the same endpoint, at the same time?

Do you know if your juniper firewall/NAT support UPnP and more specifically IGD?