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    IP questions

    Discussion in 'Networking and Wireless' started by PA-Woodchuck, Oct 30, 2007.

  1. PA-Woodchuck

    PA-Woodchuck Notebook Enthusiast

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    Where I work the IP wizzard decided to use static IP's for all the computers in 3 buildings. The problem is... he never kept track of the free IP's left. Is there a command that I can use to find out which IP's are used or still free? If so how do I do the task?
     
    PA-Woodchuck, Oct 30, 2007
    #1
  2. kegobeer

    kegobeer 1 hr late but moving fast

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    kegobeer, Oct 30, 2007
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  3. AKAJohnDoe

    AKAJohnDoe Mime with Tourette's

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    Or you could assign static IPs to the servers and implement DHCP for the clients.
     
    AKAJohnDoe, Oct 30, 2007
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  4. andyasselin

    andyasselin Notebook Deity

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    you cound just run something like active port scan do whole range of you network

    you shound be able to tell by computername if you know them


    How many pc ?

    I wound suggest doing what AkaJohnDoe say and fire the guy who setup that way :> dhcp server is way easy to mange ip

    you cound even do mac address resavtion for spefic macine pretty etc

    But all server shound have static work station dynamic

    I hope this was.nt you it guy setup that way what a magment night mare rember all ips figure out winch one is assigned to what not to mention the time it took to enter them all each machine


    Is this windows server based network? dhcp server is part 2000 server family and it easy to setup
     
    andyasselin, Oct 31, 2007
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  5. AKAJohnDoe

    AKAJohnDoe Mime with Tourette's

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    I usually recommend a separate IP address scheme for internal (intranet) from external (extranet). That is, say my company's WWW.???.COM points to IP address 123.123.123.123, the internal network would be WWW.???.NET, have no external connections (other than perhaps some special VPN access paths), have another IP address scheme, unregistered on the outside world (although the domain WWW.???.NET would be registered, for protection), or perhaps registered elsewhere, who cares as it is internal only.

    The servers would have static IP addresses in this internal, protected IP address range. The clients would have dynamic IP addresses (DHCP), also in this internal, protected IP address range.
     
    AKAJohnDoe, Oct 31, 2007
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  6. blue68f100

    blue68f100 Notebook Virtuoso

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    blue68f100, Oct 31, 2007
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  7. NotebookYoozer

    NotebookYoozer Notebook Evangelist

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    you've gotta be kidding.

    this type of LAN rollout is the EXACT reason DCHP was invented.

    like above poster said, fire the guy who set the LAN up like that.

    rick diculous.
     
    NotebookYoozer, Nov 1, 2007
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  8. AKAJohnDoe

    AKAJohnDoe Mime with Tourette's

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    Depending on the subnets, domains, network card setups, and protocols in use, you might be able to see the local neighborhood in Windows or even via a NET VIEW command in a command prompt (DOS) box.
     
    AKAJohnDoe, Nov 1, 2007
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  9. kegobeer

    kegobeer 1 hr late but moving fast

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    I don't know the reasons behind the setup, but I do know that certain secure LANs require static IP addresses.

    Just wanted people to know that DHCP can't be used in all situations.
     
    kegobeer, Nov 3, 2007
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  10. AKAJohnDoe

    AKAJohnDoe Mime with Tourette's

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    True enough, but not keeping track of the IP addresses assigned would seem to be contrary to the concept of a secure LAN.
     
    AKAJohnDoe, Nov 3, 2007
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  11. kegobeer

    kegobeer 1 hr late but moving fast

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    Yes, the admin should have kept track of all used IP addresses. Luckliy, in a true networked environment, finding all IP addresses is very easy.
     
    kegobeer, Nov 3, 2007
    #11