目前來看，只是封主機ID沒有封掉GAMETAG
即使使用最新固件的也難逃一死~無法登入LIVE
未改機的用戶登陸正常。

恩~昨天太累了早早睡了，沒有上線和人聊天，逃過一劫..

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Microsoft Starts Banning 360s on LIVE - MS Confirms
>> With the amount of posts we see on our forums ... it's clear, Microsoft decided to start banning Xbox360 with modified firmwares today.
While it's the same release date as Halo3 beta, it seems that people who didn't download Halo3 also get banned. They probably detect backup discs when you play 'em online (not confirmed yet).
Even people using the new firmwares with disc-jitter added get banned, so it looks like Microsoft found another way to detect it.
Just like on Xbox1 it seems Microsoft bans the console unique ID, not the LIVE user.
Xbox-Scene
Picture by Eraser77. This is what you get when you go to test connection and after xbox live fails click on network adapter


Update: This was just posted on Microsoft's Games Global Marketing team blog:

One of the great things about LIVE and the unified community is that we work hard to create a level playing field for all gamers and have a no tolerance policy towards inappropriate behavior like hacking or cheating. As part of our commitment to our members, we do not allow people that we have detected to have modified their console to connect to LIVE. This is an important part of our efforts to try and maintain a fair gaming environment for the large majority of gamers that play by the rules. This topic is more important than ever given the recent release of the Halo 3 beta. As a result, some consumers that try to login to LIVE who we detect have illegally modified their console will get an error code (Status Code: Z: 8015 - 190D) when trying to connect to the service. These users will not have their account automatically banned from LIVE, but they will no longer be able to access the service from the console they modified.

We have stated in the past that customers can only enjoy access to the Xbox LIVE community through the use of a genuine, unmodified, Xbox console and we will continue to enforce this rule to ensure the integrity of our service, the protection of our partners and the benefits of our users.