New Posts  All Forums:Forum Nav:

Internet Problem

post #1 of 14
Thread Starter 
I will try to explain the situation the to the best of my knowledge as it just happened again.

My brother with his MacBook Pro is preventing my iMac from connecting to the Internet. Somehow he has priority over the available bandwidth, has frozen my screen on many occasions, and forcibly change settings in the router once when I tried to stop this from happening. Apart from seeing loads of web pages open in tabs there is also Terminal open on the dock (all the time).

The best way that I can explain this issue is that out of nowhere my web pages stop working. They sometimes say something like no connection or the little blue bar on the top of the screen will go a fourth of the way. It is as though it is trying to load, but is some how being prevented.

I have recorded my previous router and iMac logs if you would have the time to look at them. I do not know if you would be able to find anything in either of them. If not is there something on my computer that would show a record of this activity?

After some research I found Vlans and Qos. I was hoping but unsure if these features would allow me to keep all three computers (iMac, MacBook Pro, and Lenovo laptop) connected to the Internet without connecting to each other. If I understood what I read I think I need computers on separate Vlans with priority by address to my desktop to ensure that my searches go undisturbed. I just need to have basic web surfing, YouTube, and my email.

What do you think he is doing to prevent me from connecting? I have two brothers and the youngest whom has the Lenovo has just connected right up several times when my computer does not work. So what ever it is this is completely intentional and only for my machine. I have restarted the computer, reformatted, replaced the Time Warner Modem three times (when I was naïve and didn’t have as much distrust as I do now), and unplugged the MacBook Pros CAT6 cable. After unplugging the cable the Internet came back immediately. The only thing I had to do was refresh my page.

At this time I have a Time Warner Modem connected to a Netgear Pro Safe rp614v4 and then the three computers attached to the router via the use of CAT6 cables. I need the iMac to do my school work and need to fix this as soon as possible. What would you recommend to remedy this? I have been given permission to buy new equipment and as well as anything I need to fix it. My parents have a limited knowledge as far as computers go and they are very limited as far as providing help. Also preferably I would like to try to keep everything hard wired and not wireless if possible. Have you ever heard of or are knowledgeable with the command line? As I am not, I should mention that I have seen this application open on the other machine. Could this be used prevent an internet connection of another computer? Is there something I could do to prevent this if it is possible?

ConsoleLogsTuesdayJanuary142014.docx 159k .docx file RouterLogsTuesday14January.docx 124k .docx file

Please let me know what you think. I hope that someone here can help as I was advised to this forum by Fry's.
post #2 of 14
It could be the mac pro is just sucking up all the bandwidth, oneo f the most common things is a torrent client on auto strat that just gies slurp, check to make sure there is nothing like that, also if they are straming it will jam the network up
Escobar
(9 items)
 
Supercomputer ^_^
(13 items)
 
 
CPUMotherboardGraphicsRAM
1055T M4A88T-D EVO USB3 ATI 6850 4 GB 
Optical DriveOSMonitorKeyboard
DVD RW Windows 8 Pro lp1900 + 2 X 15 inch dell Microsoft Comfort Curve 
PowerCase
600watt thermaltake antec 200 
  hide details  
Reply
Escobar
(9 items)
 
Supercomputer ^_^
(13 items)
 
 
CPUMotherboardGraphicsRAM
1055T M4A88T-D EVO USB3 ATI 6850 4 GB 
Optical DriveOSMonitorKeyboard
DVD RW Windows 8 Pro lp1900 + 2 X 15 inch dell Microsoft Comfort Curve 
PowerCase
600watt thermaltake antec 200 
  hide details  
Reply
post #3 of 14
Do you have anything that was set under Network Settings?
Like I do feel something connection oriented like P2P might be sucking up all the bandwidth like stated above. - But if that was really the issue your younger brother would lose connection too.

Do you think there is a Access Control policy to block you from anything? For example him going into the Router and blocking access to you?

I know if everybody is on Wireless you can use Wireless Isolation so that you guys can't contact each other.

Try opening a terminal and running a perpetual ping to the default gateway and keep it running it may help keep a established connection to the default gateway.
ESXi Home Box
(6 items)
 
The Workstation.
(16 items)
 
 
CPURAMHard DriveOS
Dual L5630 72GB DDR3 RECC 120GB VERTEX 4 + 6TB RAID5 ESXi 6.0 U2 
Other
Dell PowedgeR710  
CPUGraphicsRAMHard Drive
Intel Core i5 2.4GHZ Intel Iris Pro 16GB DDR3 256GB PCI-e x2 
OSKeyboardMouse
OSX 10.11 + Win 10 Apple Wireless Keyboard Apple Magic Trackpad 
  hide details  
Reply
ESXi Home Box
(6 items)
 
The Workstation.
(16 items)
 
 
CPURAMHard DriveOS
Dual L5630 72GB DDR3 RECC 120GB VERTEX 4 + 6TB RAID5 ESXi 6.0 U2 
Other
Dell PowedgeR710  
CPUGraphicsRAMHard Drive
Intel Core i5 2.4GHZ Intel Iris Pro 16GB DDR3 256GB PCI-e x2 
OSKeyboardMouse
OSX 10.11 + Win 10 Apple Wireless Keyboard Apple Magic Trackpad 
  hide details  
Reply
post #4 of 14
I'd try something like this to start ruling out factors:

http://skeletonkeysecurity.com/post/25562932554/arp-poisoning-alerts-for-osx
Waiting on X399
(13 items)
 
  
CPUMotherboardGraphicsRAM
AMD Phenom II B57 @ X4 3.9 Gigabyte 790FXTA-UD5 Sapphire Radeon 290 8 GB G.Skill 2133 
Hard DriveCoolingOSKeyboard
250 GB 840 EVO Noctua NH-D14 Windows 10 Logitech K350 
PowerCaseMouseMouse Pad
Seasonic x750 Corsair 600T Logitech G100s Razer Goliathus Speed 
Audio
Plantronics Gamecom 788 
  hide details  
Reply
Waiting on X399
(13 items)
 
  
CPUMotherboardGraphicsRAM
AMD Phenom II B57 @ X4 3.9 Gigabyte 790FXTA-UD5 Sapphire Radeon 290 8 GB G.Skill 2133 
Hard DriveCoolingOSKeyboard
250 GB 840 EVO Noctua NH-D14 Windows 10 Logitech K350 
PowerCaseMouseMouse Pad
Seasonic x750 Corsair 600T Logitech G100s Razer Goliathus Speed 
Audio
Plantronics Gamecom 788 
  hide details  
Reply
post #5 of 14
Thread Starter 
Beers, besides using this app to find it what do I do to stop it? How can he route my internet connection through his computer? I have checked all of my settings in my router web login and there is nothing that was changed from the default. What ever the problem is it is not being administered through the router.

I would like to keep the setup completely wired if possible so Guest networks or wireless isolation might not be an option. Is there a hard wired version of this?

Is there a way I can setup something on my end whether hardware, software, or modifying my computer settings to prevent this? He does play P2P and video stream, but as was mentioned my youngest brother has no issues. If it was just a bandwidth problem it would affect all the computers equally.

Has any had a chance to look through the logs to see if there is anything of value? Please let me know if you find something of value.
post #6 of 14
It was more of a 'check and see if you get alerts then this would tell you that this is happening, if you get none it is something else' type of situations.

You can easily 'poison' someone else's ARP entry on a specific-computer basis that is on your network so they believe your PC to be their default gateway.
Waiting on X399
(13 items)
 
  
CPUMotherboardGraphicsRAM
AMD Phenom II B57 @ X4 3.9 Gigabyte 790FXTA-UD5 Sapphire Radeon 290 8 GB G.Skill 2133 
Hard DriveCoolingOSKeyboard
250 GB 840 EVO Noctua NH-D14 Windows 10 Logitech K350 
PowerCaseMouseMouse Pad
Seasonic x750 Corsair 600T Logitech G100s Razer Goliathus Speed 
Audio
Plantronics Gamecom 788 
  hide details  
Reply
Waiting on X399
(13 items)
 
  
CPUMotherboardGraphicsRAM
AMD Phenom II B57 @ X4 3.9 Gigabyte 790FXTA-UD5 Sapphire Radeon 290 8 GB G.Skill 2133 
Hard DriveCoolingOSKeyboard
250 GB 840 EVO Noctua NH-D14 Windows 10 Logitech K350 
PowerCaseMouseMouse Pad
Seasonic x750 Corsair 600T Logitech G100s Razer Goliathus Speed 
Audio
Plantronics Gamecom 788 
  hide details  
Reply
post #7 of 14
Theres nothing of value at all in them im afraid, id be very surprised if he was arp posining you (i mean why?), do you use static addressing or DHCP? (could be a ip conflict?)
Escobar
(9 items)
 
Supercomputer ^_^
(13 items)
 
 
CPUMotherboardGraphicsRAM
1055T M4A88T-D EVO USB3 ATI 6850 4 GB 
Optical DriveOSMonitorKeyboard
DVD RW Windows 8 Pro lp1900 + 2 X 15 inch dell Microsoft Comfort Curve 
PowerCase
600watt thermaltake antec 200 
  hide details  
Reply
Escobar
(9 items)
 
Supercomputer ^_^
(13 items)
 
 
CPUMotherboardGraphicsRAM
1055T M4A88T-D EVO USB3 ATI 6850 4 GB 
Optical DriveOSMonitorKeyboard
DVD RW Windows 8 Pro lp1900 + 2 X 15 inch dell Microsoft Comfort Curve 
PowerCase
600watt thermaltake antec 200 
  hide details  
Reply
post #8 of 14
Thread Starter 
Unfortunately he has it out for me and I do not know why. One day a year and a half ago this just started to occur and I gave him the benefit of the doubt. I though it was my machine and I had it reformatted, was suggested by him to get a new router (was told that the message "another device on the network is using your computers IP address" was from a bad router), and was told that the terminal application up on the dock was for a game called star sonata and again another time for rune scape. He has basically lied so many times that he can't seem to figure out what cover he is currently using. I know for a fact that there is nothing in the command prompt that is required for rune scape. I can not speak for the other game or games that he is probably running.

Today as a test just to check I made sure that my computer was on in sleep mode. My computer was at 192.168.2 then he connects up his machine and I get this message "Another device on the network is using your computer’s IP address (192.168.1.2).", then I checked the network settings and my computer switches to 192.168.4. How did my computers address change and how did it skip 192.168.3? The router is setup to be dynamic and there were only two machines connected. How was he able to force my machine which was already connected to change?

If he is arp poisoning or modifying something can Vlans stop this? Is there a broad blanket solution that I can use to prevent this activity without trying to find out what it is? I think it could be a multiple of things because anytime I try to stop it from happening there are always new weird things that I can't account for.

I think this might be relevant so I will also mention that he has two friends one of which has a brother working at Microsoft and anther who has an internship at Google. Even if he doesn't understand what exactly he is doing I guarantee you that he just asks one of them and they are more than happy to oblige.

So what do I do? I have permission to get and setup anything except actually disconnect him from the internet (unplugging the ethernet cord). Is there some reasonably priced setup that I can use to completely stop all future activity? That is also affordable and will ensure peace of mind so that I can get on with other things?

Also besides console logs and router logs is there anything else I can get from my computer for you to look at?

I forgot to also mention that I also have a my own Macbook pro and this problem also carries over to it as well.

Thanks
Edited by computes - 1/18/14 at 12:40pm
post #9 of 14
Thread Starter 
Ulquiorra, A while back before he learned how to do all of this I was given permission by my father to block one or two P2P games (by port). He was using so much between everything that it was running to slow. He also made himself admin for six months setting up a password to port forward his xbox and computer. Another problem because at time I didn't know it but he has been taking more than his fare share for a while. I was force to glue the rest button on the back of the router just to keep him from setting up anything more. Basically, he keeps graduating from one thing to the next. Except now it is above my head and I am left helpless.

I have contacted three neighbors to try to get them to help, went to Fry's, Best Buy (talked with geek squad), tried to get Time Warner involved (they replaced three modems), both emailing and talking to Netgear, Cisco, Linksy's, Trend Net, dd-wrt, Tomato. Also posting on internet forums like linux.org, cert forums, bleeping computers, and hard forum. I do not know what to do at this point because I think most people are only knowledgable on basic setups. Or I have not explained my situation correctly in there common knowledge/industry terms. I appreciate you looking at my logs.
Edited by computes - 1/18/14 at 1:04pm
post #10 of 14
right so what hes doing is just chaning his IP address to yours which makes computers go *whaa* and kick themselves off the network, now to fix that problem wink.gif. The IP address is kind of like a phone number, so if two people are trying to access the network with the same IP the router doesnt know where to send the data

Are you using wireless or wired? (im guesing wireless) If so does therouter support multipule wirless networks at once?

Another (usualy better option) is to just tell him what hes doing and ak him to stop, if that doesnt work ask your father to sit down with him and also say look we share this internet conection can you not host a server on it / do heavy downloading during times that other people want to use it, try and reach a poltical ending by going through the issue and trying to make him understand.

If it continues then the only other option is to "revoke" his access by either blocking his mac address if wireless (ot usefull unless you also do mac address whitelisiting on the router) or drop his lan port (ONLY with parents / owners of the lans permison) or remove his intenet device, he will hate it but trust me it will do him good to learn consiqunce redface.gif
Edited by Ulquiorra - 1/19/14 at 2:07am
Escobar
(9 items)
 
Supercomputer ^_^
(13 items)
 
 
CPUMotherboardGraphicsRAM
1055T M4A88T-D EVO USB3 ATI 6850 4 GB 
Optical DriveOSMonitorKeyboard
DVD RW Windows 8 Pro lp1900 + 2 X 15 inch dell Microsoft Comfort Curve 
PowerCase
600watt thermaltake antec 200 
  hide details  
Reply
Escobar
(9 items)
 
Supercomputer ^_^
(13 items)
 
 
CPUMotherboardGraphicsRAM
1055T M4A88T-D EVO USB3 ATI 6850 4 GB 
Optical DriveOSMonitorKeyboard
DVD RW Windows 8 Pro lp1900 + 2 X 15 inch dell Microsoft Comfort Curve 
PowerCase
600watt thermaltake antec 200 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Networking & Security