I live in a so called "student housing" where everyone shares the same 20/2 mbit connection.
Now in the beginning I thought that there would be some kind of flow control that would split the bandwidth to each user,
but no - everyone has full access to the 20/2 connection. Until a few days ago, I was surprised to find out that it actually worked fine. Running speed tests always revealed around 17000 kbps and latency in games were also always below 50 ms.
But all of the sudden, hell breaks loose. Speed test reveals 2000 kbps :O .. Latency in games, 200 and above... Wtf !!
So of course, I decided to fix the problem myself. Because the people/person who manages this network must be a real idiot seeing the way everything is setup.
So I start by mapping out the network I am on. The very first thing I noticed was port 80 (and 23) was open on 192.168.1.102 and OS scan revealed it was a HP ProCurve J4899A. I Obviously point my browser to it to discover that absolutely no user / password is required. Omg! telnet 192.168.1.102 = Welcome ! No password either... Wtf !! Great network that idiot has set up. So at the time being, it was 2 am so I thought about what I should do to deal with the downloader. The front page of the switches website showed an image of the switch with all the active ports, ones that were active were green. So since it was 2 am on a Tuesday, I started deactivating port by port and performing speed tests online to see if it had any impact with the speed. After deactivating port 30 on the switch, the speed test goes 17000 kbps again. Bam! Found out who he was! I also did a new port scan on the network after deactivating him to compare it with the old one so I knew what IP, Mac Address and fingerprints he had, so even if I lost admin access to the switch I would still be able to find him again. So I kept his port deactivated for an entire day hoping that he would realize he wasn't allowed to download at those speeds, consuming everyone's bandwidth. Next day when I come home from school, I activate his port again. Later that evening he starts again. So deactivate him again for the entire night. So next day again when I come home from school, I notice the speeds are slow even though I haven't reactivated his port again. So I point my browser to the switch and find out that user name / password are required now ! So I find out with nMap that he is back on the network! The little fuc*ker complained about his internet not working and now I have no idea what to do!
Any suggestions would be greatly appreciated! This has been going on for some time now and is unbearable :/ . Maybe the smartest thing to do would simply call the office but doubt they will be of any help. Rather take thing into my own hands aswell :b ..
Lol, I wrote way too much
, and excuse my English, I'm danish :b