I've run FSD on my JTAG'ed Jasper, and XBL is blocked in the family settings. This console is connected to my home network 100% of the time - I can still install to NXE the regular way, my profile and HDD work fine on other consoles. I'm pretty sure it's just the dashboard saying, "Hey Xbox Live, are you awake?" and Xbox Live replying "Yep!" I don't think your console is sending any specific information to the service, especially if you don't have any XBL accounts on the HDD at all (I don't), since you have not agreed to the XBL TOS if you don't have a Live account.
This should be stickied.
Either way we need to build up a clear picture of what has happened and could happen.
@ Maximize: You say u got banned in 15 seconds. Do u know the entire history of your jtag? Did u mod it yourself/never used it online? ...It's strange that your ban doesn't corrupt saves/achievement's between consoles, a 'normal' ban would corrupt data/not sign off trusted content.
...Have you redumped your NAND and checked the secdata to compare before and after?
What brandogg said makes sense, i.e. the 'yes I'm alive' handshake, but without any h/w or user specific console data going out/in.
Does anyone know how we could check/interpret the traffic while in this idle state?
Edited by Haygar, 01 August 2010 - 02:42 PM.