configuring router for college

Discussion in 'Tomato Firmware' started by dontjee, Aug 3, 2007.

  1. dontjee

    dontjee LI Guru Member

    This fall I will be using a router at a university that assigns users ip addresses by DHCP. I know that routers can conflict with this because I've heard of people getting their internet turned off for what the university calls a rogue dhcp, i.e. the user was broadcasting another dhcp server which conflicts with the universities. I was wondering how to avoid that using tomato. I think this can be done by disabling the router's DHCP, but I am going to be using a xbox 360 on the router and the university requires that you register your devices on the network. The only way to register on the network is through a http page, which isn't possible on a xbox 360, so normally you just register the router which covers any device attached to it. If the DHCP is disabled will this still work? Thank you very much.
  2. bogderpirat

    bogderpirat Network Guru Member

    if you use the DHCP mode (this is confusing, it only means that tomato will accept dhcp-ips over the wan port) to dial in (basic/network) and leave the dhcp server turned on, your network will still receive dynamic ips, the university won't receive anything.
  3. ifican

    ifican Network Guru Member

    Your best bet is going to find out how they are determining a rogue device. Sometimes they use the OUI sometimes they run a network scanning utility. Once you determine what they use you will be better off, your internal dhcp means nothing to them. I would make sure your wireless is turned off then the only people that know are the ones that come into your room. Once your router pulls dhcp from them you can simply still access the webpage in question and it will appear that your computer is comming from the ip your router has, you should then be able to register and proceed. If you can find out the way they determine rouge devices make sure when you register if they ask you state you have a linksys nic (or whatever router you have). Other then that you should be ok.
  4. dontjee

    dontjee LI Guru Member

    What happens when they get a "rogue dhcp" is that people around you get the wrong dhcp server, something like 192.168.x.x or something instead of the university dhcp server and they call the university IT people. As long as my router won't broadcast its dhcp server back onto the university network, I'll just use the router's dhcp because it's easier. Thanks for all the help guys.
  5. ifican

    ifican Network Guru Member

    Well there you go, if you want to use wireless then make sure you do not broadcast your ssid and you should be good to go.
  6. NateHoy

    NateHoy Network Guru Member

    More to the point, if you choose to use Wireless, there are a few steps you want to take:

    1. As ifcan said above, turn off SSID Broadcast.

    2. If you are only going to be using the access point within your dorm room and very close nearby, lower the transmission strength to the lowest setting you can manage. That keeps your signal from radiating further than you want it to (and cuts down on the RF radiation in your dorm room which, while almost certainly harmless, is best kept to a minimum anyway).

    3. Use WPA or WPA2 encryption, that will keep anyone else from being able to access your wireless network at all.
  7. RTSAnime

    RTSAnime Network Guru Member

    For this to work you either have to turn off dhcp and connect the router to the campus's network via one of the lan ports, or leave dhcp on and connect the router to the campus's via thewan port.

    Note the second option may be hard depending on the amount of traffic on your campus lan. Some of them have tons of broadcast and whatnot that can clog little routers like the WRT54G
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