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Thread: multiple ip address, how does it work?

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    multiple ip address, how does it work?

    My isp has given me 8 ip address, (i think 6 is usable)..

    How do i assign this to my router, ie, can i use one to publish home security cam, one for home server access, one for person web pages etc,,

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    Re: multiple ip address, how does it work?

    You absolutly sure these address aren't to be used for the following:

    WAN IP Address
    Subnet Mask - Looks something like 255.255.255.0
    Gateway Address
    Primary DNS Server -----|Both these will look like very similar addresses e.g. 194.168.4.100
    Secondary DNS Server -| e.g. 194.168.8.100

    These will need to be configured on your router manually (some could be configured via DHCP) hence the large number of IP addresses you have been given.

    I could well be wrong with the above just seems a bit odd that an ISP would give you a large number of IP addresses otherwise unless they are Static IP's ...

    You will want to have a look at port forwarding to make your local network devices accessible from the Internet.


    EDIT - Looks like I misunderstood ...
    Last edited by digit; 06-01-2009 at 01:56 PM.

  3. #3
    Splash
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    Re: multiple ip address, how does it work?

    Yes, you can use it exactly as you suggest however you need to be sure that your router supports the feature. The addresses you have been given should include a router and broadcast address as well as a subnet - configure your router for the router address as specified on the documentation for the router and you should be able to get online.

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    Re: multiple ip address, how does it work?

    Who is your ISP, and what router do you use? Different ISPs use different methods if handing out multiple IP addresses, with especially Be being a bit unconventional - Be gives out literally 8 usable IPs which are currently normally not contiguous.

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    Re: multiple ip address, how does it work?

    I use ADSL24 and the router is a Belkin F5D8632UK4A N1 Vision Wireless Modem Router

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    Re: multiple ip address, how does it work?

    Sorry, they are also static

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    Splash
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    Re: multiple ip address, how does it work?

    That router doesn't seem to have the capability to manage multiple static ip addresses as far as I can see.

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    Re: multiple ip address, how does it work?

    ok, thanks..

    so whick routers can facilitate it?

  9. #9
    Splash
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    Re: multiple ip address, how does it work?

    If I were you I'd be wondering if you actually *need* these static ip addresses, or if you can do what you need to do through use of port forwarding. If you decide that you definitely do I can put in a hearty recommendation for the Draytek Vigor routers - I'm on my third after using a 2600, then a 2800, then a 2820N. All supported the functionality you're looking for. Have a look see for kit that supports Multi-NAT, which is likely what you're looking for.

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    Re: multiple ip address, how does it work?

    i guess its not esential for now, just seems wasted as i have 8 ip and only use one,

    well in the future (when my router dies, usually not that long), i will look out for multi NAT routers..

    Thanks

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    Re: multiple ip address, how does it work?

    not too sure about this but wouldn't the idea be to set your router as a bridge and then enter the ips you want to use manually into the computers?

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    Re: multiple ip address, how does it work?

    Using the router as a bridge negates any form of NAT though, I prefer to use MultiNAT and pass traffic on specific ips and ports to specific LAN addresses.

    Again, the OP would probably be better off without it, and just using port forwarding until they actually require extra addresses.

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    Re: multiple ip address, how does it work?

    i'd imagine that people who want to have static ips want to be free from nat, but that's just me.

    i'm sure there's a more exotic solution like using a low power computer to run as a gateway machine and handle everything through that.

  14. #14
    Splash
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    Re: multiple ip address, how does it work?

    Personally I prefer to only open required ports on my firewall to minimise security risk.

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    Re: multiple ip address, how does it work?

    Quote Originally Posted by Splash View Post
    Using the router as a bridge negates any form of NAT though, I prefer to use MultiNAT and pass traffic on specific ips and ports to specific LAN addresses.

    Again, the OP would probably be better off without it, and just using port forwarding until they actually require extra addresses.
    Agreed.

    OP: There is very little need for a block of IPs unless you have multiple SSL servers on same port I suppose. You wouldn't have to fill out RIPE form too by having a single IP address and translating it via IP & Port and let the router handle mapping between devices.

    The 255.255.255.248 (/21) subnet will give you 5 addresses to be used by hosts (one for subnet, one for router and one for subnet broadcast leaves 5 host addresses free)
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