I'll keep all identifying information out of the post since it should all be documented in the complaint. I was in a Xbox Live party with multiple people, the party leader being the user I am filing the complaint against. The party leader, using third party programs, obtained my IP address and information pertaining to it, then proceeded to launch a DoS attack against my home network, shutting my internet off briefly. I filed a complaint through the Xbox 360 system complaints, as well as through online support, and per support staff, am posting a related topic here. I also wish to obtain the ISP information of the user I'm filing my complaint against, so I can file a personal complaint with them. Thank you so much for your support.