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Thread: Using a router on an ethernet socket?

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    jim
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    Using a router on an ethernet socket?

    Wondering what the best way of doing this is.

    I'm going to uni soon, and they're providing an ethernet socket on the wall. I need to connect to that:

    Wired:
    Desktop
    Server
    Netbook
    PS3

    WiFi:
    Netbook
    Mobile Phone

    I currently have a 5 port gigabit ethernet switch, but that's it.

    I'm guessing I can use the 5 port ethernet switch, leave the netbook/PS3 unconnected and use a Wireless AP to provide wireless.

    But I'm thinking it might make more sense to get a wireless ADSL router, assign myself a subnet (not sure if that even makes sense) so that I'm protected and secure from the rest of the network, with my own network functioning as normal with separate 192.168.100.x IP addresses, and combine everything into one unit. And then I can use the gigabit switch downstream of it to speed up server --> devices communication.

    What's the most sensible approach?

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    Late Night Ninja! CrazyMonkey's Avatar
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    Re: Using a router on an ethernet socket?

    The most sensible approach will depend on what your university allows. Some universities ban the use of wireless access points, installing routers etc.. the list goes on. I'd check that you are allowed to run wireless first and if possible i'd go for the second choice - providing you can get it setup. I had difficulty assigning my router a dynamic ip, it would only allow a static ip so in effect it took itself off the network. Other than that when i turnt DHCP and whatnot off it was acting fine as a switch/access point.

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    Re: Using a router on an ethernet socket?

    A few people who are already there have recommended bringing a wireless AP, so I'm assuming it's okay. There aren't really any exhaustive T&Cs relating to the property or the internet connection so it's hard to know what's okay and what isn't.

    So any ADSL router *should* be fine then? I'm guessing there's no easy way of finding out which ones might have compatibility issues though.

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    The late but legendary peterb - Onward and Upward peterb's Avatar
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    Re: Using a router on an ethernet socket?

    I doubt a switch would work. Each device on the switch will need an IP address, and while the university DHCP server might hand out IP addresses willy nilly, I would doubt it. You would be adding more devices to that local subnet (depending on how the University has set up its network)

    You may also find that you have to register the mac address of the device so that the IP address is mapped to mac address.

    So you would have to use a router and set up your own subnet, with the ip address of the wall socket as the default gateway. Depending on the router, you could spoof it's mac address on the WAN side so that it connects to the Uni network.

    But as crazymonkey says, you need to find out what you can do before you start doing it!
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    Re: Using a router on an ethernet socket?

    I know, I'm just really struggling to find any information out so far. Whilst it's a campus-based residence, it's not a university-owned residence and they're severely lacking in terms and conditions for anything. Will explore that side of things over the next couple of weeks I guess.

    MAC address spoofing might be handy, yeah - will look into that.

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    The late but legendary peterb - Onward and Upward peterb's Avatar
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    Re: Using a router on an ethernet socket?

    Quote Originally Posted by peterb View Post
    <---snip

    So you would have to use a router and set up your own subnet, with the ip address of the wall socket as the default gateway. Depending on the router, you could spoof it's mac address on the WAN side so that it connects to the Uni network.

    snip--->
    My bad - no, the address of the router on your subnet would be the default gateway, not the Uni! The mac spoofing wouod only be needed if you had a to refister a computer mac address and then needed to transfer that to the wan port on the router.
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    Re: Using a router on an ethernet socket?

    use a cable router, not an ADSL router. Something like a Zyxel NBG334W would be ideal (and can be had for about £10 on ebay). Will allow you 4 wired connections (or insert your 5 port switch to get 7 wired) and wireless access. It also supports mac spoofing

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    Re: Using a router on an ethernet socket?

    Why cable over ADSL, out of interest?

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    Re: Using a router on an ethernet socket?

    Quote Originally Posted by peterb View Post
    My bad - no, the address of the router on your subnet would be the default gateway, not the Uni! The mac spoofing wouod only be needed if you had a to refister a computer mac address and then needed to transfer that to the wan port on the router.
    Yeah, I've just dropped them a message to find out what the situation is. They mention routers and so on on the support pages, but refer to them as "unsupported". So heck knows how it works!

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    Re: Using a router on an ethernet socket?

    Quote Originally Posted by snootyjim View Post
    Why cable over ADSL, out of interest?
    Because if it is an ethernet socket it won't be ADSL! It is literally an ethernet connection as part of its own subnet. An ADSL router has an ADSL modem built in which you don't need or want. You could use a Draytek 2820 which has both an ADSL connection and an ethernet WAN connection so it will do both, but a bit overkill really for what you want, unless you are planning on moving into rented accomodation later and would then need ADSL.
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    Re: Using a router on an ethernet socket?

    Definatey check the rules before you buy anything.

    I have a friend who is the network admin at an oxford college, where users are not allowed to setup WiFi access points, network hubs or connect more than one device to the network ports they have been given. He tells me that he sometimes walks the coridors with with WiFi sniffing equipment so that he can detect unauthorised WiFi networks, and then block the offending ports.

    There is also a long list of banned software. As well as the usual filesharing software, students are not allowed to use Skype, because if they do Skype detects that they have a static IP address with a 10GiB connection to the internet, and makes their PC a 'Super node' and route all skype calls for half of the UK though the student's PC.

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    Re: Using a router on an ethernet socket?

    Quote Originally Posted by peterb View Post
    Because if it is an ethernet socket it won't be ADSL! It is literally an ethernet connection as part of its own subnet. An ADSL router has an ADSL modem built in which you don't need or want. You could use a Draytek 2820 which has both an ADSL connection and an ethernet WAN connection so it will do both, but a bit overkill really for what you want, unless you are planning on moving into rented accomodation later and would then need ADSL.
    Yeah, that was what I thought - didn't want to fork out for a router that was then no use 2 years down the line because I had a full phone line.

    It won't cause compatibility issues though?

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    Does he need a reason? Funkstar's Avatar
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    Re: Using a router on an ethernet socket?

    Peter is right, you want a cable or "broadband" router as opposed to an ADSL router.

    think of the othernet port in your room as the back end of a VIrgin Media modem (i'm sure it will be more reliable though ). That is a plain ethernet port too. The modem gets an IP and all that, but includes no routing, NAT or DHCP services, that is why yoiu need a router to attach multiple devices of VM and to this.

    Check with others in detail first, it might be that they are running simple access points, in which case the Uni network is dishing out all the IPs you could need and yoiu can get away with a switch and AP. Personally I would prefer to run my own subnet anyway, more security that way.

    A drayteck 2820 can use the ADSL and the WAN (cable) connection seperately or at the same time for fail over, not sure if it does load balancing.

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