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Thread: " port scanner problem"

  1. #1
    Join Date
    Nov 2001

    Question " port scanner problem"

    well,,, i'm new to the port scanner software ,, and when i first used it on my own system to check theopen ports on my pc ( the software i used was superscan...) so... when i performed the test, and i clicked on one of its options called interfaces it showed the following results

    point to point:no
    can broadcast:yes
    can multicast:yes

    can u plz explain what does this listing mean in simple terms explainng each term barring the address option.

    thanx in advance

  2. #2
    Senior Member
    Join Date
    Jun 2002
    it's providing a listing for your loopback address (err. one of them as loopback can be anything in the network). it's a local interface only, so theoretically, an remote host cannot directly access it.

    address: the ip or internet address of the interface

    broadcast: the broadcast address of the network the interface resides on. a broadcast address (as it's name implies) serves as a means to transmit information to every host in the network. in reality this is only true of non-session based transports (ie. udp, icmp, etc.)

    netmask: used to identify the network portion of the internet address. in this case the ip is, if you 'and' it with this will yield which is known as the network address.
    another common notation for netmasks is ip/bit count.
    where 8 is the number of bits set in the netmask. as a binary representation could look like:


    (note the number of bits that are set is equal to 8)

    for the ip address, using in the same representation would be:


    up: just means that the interface is up (enabled, driver is attached, and the device as far as the system can tell is functioning)

    point to point: determines the type of physical connection the interface maintains. a point to point (ppp) connection is generally found in some type of dial-up, or cable which is more commonly known as point to point over ethernet (pppoe).

    loopback: just determines what was stated at the start of this reply.

    can broadcast: partially discussed in broadcast, but means that this interface has the ability to utilize the broadcast address. (although the broadcast address used here is not really accurate - you won't be able to ping or transmit to

    can multicast: multicasting is similar to broadcasting to a subscribed list. in multicasting, hosts join a multicast group and then receive and send to that group.

    and while all of this is useful background information, it really has little baring on network or port scanning.

  3. #3
    Join Date
    Apr 2002
    aren't port scanners hackers tools? I know they can be used to see if you have any open ports but why not just use a security scanner? they are available free on the net and are alot easier to read.

  4. #4
    Originally posted here by Ryan Nyquist
    aren't port scanners hackers tools? I know they can be used to see if you have any open ports but why not just use a security scanner? they are available free on the net and are alot easier to read.
    port scanners can be used as hacker tools, but a computer in general is a hacker tool. Port scanners are a great way to optimize your security, for one because it does a thorough check and has a longer listing of ports ect. that you may be able to find. I could be wrong about that reason, but my experience with security scanners and port scanners has brought me to that conclusion.

    Good luck with your scanner, superscan is a fine piece of software.
    And droby10 did a great job of summing those lists up.

  5. #5
    Join Date
    May 2002
    I never used super Scan, I use Net Scan Tools Pro 2000(better than Super Scan), but if all you can do is that you must have an old version.

    To get the newest version, goto: http://www.foundstone.com/knowledge/scanning.html
    \"keep your friends close, your enemys closer, and your administrator closest.\"

  6. #6
    Senior Member
    Join Date
    Apr 2002
    I wrote a mini tutorial on port scanning entitled What port is that? that may be useful to you.

    Hope it helps. Luck
    \"I may not agree with what you say, but I will defend to the death your right to say it.\"
    Sir Winston Churchill.

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