Static DHCP vs MAC filtering

Discussion in 'Wireless Internet' started by RadarG, Jan 7, 2004.

  1. RadarG

    RadarG Guest

    I have a Dlink 614+ and it has MAC filtering but also it has Static DHCP
    used to allow DHCP server to assign same IP address to specific MAC
    address.or What is better this or MAC filtering? RadarG
    RadarG, Jan 7, 2004
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  2. RadarG

    Bob Willard Guest

    Maybe I don't understand what your question is, but MAC filtering has
    nothing to do with the IP address. With static IP assignment, the
    PC picks the IPA and does not use DHCP; with dynamic IP assignment,
    the PC asks the DHCP server for an IPA. Either way, MAC filtering is
    based on the MAC rather than the IPA.
    Bob Willard, Jan 7, 2004
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  3. I'd say Static DHCP will give the same ip address to the same pc every
    time. The MAC filtering is to say WHAT pc's are allowed to get ip
    addresses. If you don't want out-side (of your network) pc's to be
    able to get on to you network. This way if I come over and plug a pc
    into you network and you have MAC filtering setup (and I'm not on the
    list) my pc wouldn't get an ip address and I can't get on your
    gene martinez, Jan 7, 2004
  4. These are very different issues. Static DHCP means that a client with
    a given MAC address always gets the same IP address assigned to it
    dynamically. This is useful if you don't want to go through the
    hassles of static IP addresses for all your clients (i.e., if DNS
    servers change, etc.), but still want/need certain clients to have the
    same IP address. For example, we have a TCP/IP-addressable network
    printer. It asks the DHCP server for an address, but the server
    always gives it the same address, so that all the computers on the
    network can always assume that the printer is as the same address.

    MAC filtering means that your 614+ will only allow clients that have
    given MAC addresses onto the network. I would recommend that your
    turn this on, as it provides a pretty good (but not 100% secure) form
    of security -- casual interlopers cannot get onto your network.

    So you can use both static DHCP and MAC filtering. Note that static
    DHCP has nothing to do with security.
    Michael Dryja, Jan 13, 2004
  5. RadarG

    Roy N. Guest

    Couldn't you accomplish the same thing by disabling the DHCP server and
    using static DHCP? Won't this technique work the same since only the
    assigned MAC devices will be served an (static) IP address?

    Is one method more secure than the other or are they equivalent?
    Roy N., Jan 15, 2004
  6. RadarG

    James Knott Guest

    You either have dhcp or you don't. "Static" dhcp is simply reserving
    specific IPs for certain MACs. If you don't use dhcp, you have to use a
    static configuration.


    Fundamentalism is fundamentally wrong.

    To reply to this message, replace everything to the left of "@" with
    James Knott, Jan 15, 2004
  7. Roy, furthermore static dhcp isn't the same as mac filtering. With
    mac filtering, the computers aren't allowed to get on the network at
    all. With static dhcp, the computers are allowed to get on the
    network, but just are not given ip addresses dynamically. They could
    assign themselves static ip addresses and have free reign on your
    network. Since the private ip addresses are limited in number, it
    would be a trivial issue to figure out what ip address scheme you are
    using. Whereas with mac addressing, it's much more difficult to spoof
    a mac address.
    Michael Dryja, Jan 24, 2004
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