understanding ip addresses

Discussion in 'other software & services' started by dabud, Feb 22, 2005.

Thread Status:
Not open for further replies.
  1. dabud

    dabud Registered Member

    Joined:
    Feb 22, 2005
    Posts:
    4
    i am trying to find some info on ip addresses.
    1] i have 2 computers, each has an ip address e.g. 143.000.000.000 and 143.111.000.000

    2] Everytime i log on to my isp [connect to internet] they give me another ip address 207.143.219.02

    3] There is a 3rd address that pops up when ever i run programs called port explorer or IP Tools 127.0.0.1 [am trying to learn how to use these programs]

    What is all this??

    If it sounds like i know zilch, its because i dont know zilch.
    Is there some website some one can direct me too to understand what all this means [1 2 3 above] I have done google search but so far have not found what i want in ip info.
    thank you
     
  2. Jimbob1989

    Jimbob1989 Registered Member

    Joined:
    Oct 18, 2004
    Posts:
    2,529
    Are you behind a router? out of interest.

    Jimbob
     
  3. `mishimasan`

    `mishimasan` Registered Member

    Joined:
    Feb 19, 2005
    Posts:
    209
    Location:
    London, England
    It seems to me that you have a dynamic IP address, which is given to you randomly from the free ones that are available at your ISP every time you connect to the internet (DHCP pool - Dynamic Host Configuration Protocol).

    As for the IP address that 'pops up' with 127 as the first octet - I think you need to go into more info on that because I'm not quite sure that I understand where it pops up...
     
  4. dabud

    dabud Registered Member

    Joined:
    Feb 22, 2005
    Posts:
    4
    no, jimbob, i am not behind a router. I do, however use a program called Port Blocker [From AnalogX website]
    I use an AV called AVG and I am not using a firewall, My OS is windows XP SP1a.
    sorry i should have probably included all that.
     
  5. dabud

    dabud Registered Member

    Joined:
    Feb 22, 2005
    Posts:
    4
    mishimasan

    When i am running a program called IP TOOLs , it [127.0.0.1]shows up in the connections screen as a LOCAL ADDRESS, along with my [host] machine address
    145.239.xxx.xxx.

    IP Tools similar to Port Explorer
     
    Last edited: Feb 22, 2005
  6. `mishimasan`

    `mishimasan` Registered Member

    Joined:
    Feb 19, 2005
    Posts:
    209
    Location:
    London, England
    A good way to find out what IP addresses matter to you, is to go to Start Menu > Run > type "cmd"

    In the CMD (command prompt), type "ipconfig/all".

    This will display all of the Internet Protocol configuration for your local network. As you don't have a router, you can see your real IP address, rather than a private one.
     
    Last edited: Feb 22, 2005
  7. loles16955

    loles16955 Registered Member

    Joined:
    Feb 22, 2005
    Posts:
    2
    Hi Everione ;)

    127.0.0.1 is every pc's host ip so we all have that one. It is the IP our own pc uses to send info out, or to itself.

    Greetings

    Loles
     
  8. meneer

    meneer Registered Member

    Joined:
    Nov 27, 2002
    Posts:
    1,132
    Location:
    The Netherlands
    Just to clear things up:
    your two computers are connected to eachother via your local network?
    There is only one internet connection setup? Or does every pc connect through dial up?

    The ipconfig command givenearlier must be: in cmd type "ipconfig /all" (no quotes of course).
    Reply with the ip addresses of both computers with and without internet connection.

    Here's some info on how ip addresses work
     
  9. `mishimasan`

    `mishimasan` Registered Member

    Joined:
    Feb 19, 2005
    Posts:
    209
    Location:
    London, England
    Sorry about the invalid space - I've corrected it now.
     
  10. Antarctica

    Antarctica Registered Member

    Joined:
    Feb 25, 2003
    Posts:
    1,617
    Location:
    Canada
    Interesting site meneer, thank you for the link. :)
     
  11. Arin

    Arin Registered Member

    Joined:
    May 1, 2004
    Posts:
    997
    Location:
    India
    dear dabud, welcome to the forum. lets address your concerns one by one.

    1. the IP addresses you are stating 143.000.000.000 and 143.111.000.000 are not
    valid ones. these are class B network address which should not be used by any
    home computers.

    2. as your ISP is providing you a IP address, it means they are using DHCP to provide
    you a temporary IP address. this will change everytime you log onto the Internet.

    3. 127.x.x.x IP address block is the loopback address. the most popular address is
    127.0.0.1 but 127.23.45.67 will also work in the same way. this loopback address
    is used to check if your TCP/IP stack is initialized or not.

    I am still searching on the Net for a good site but everyone seems to jump off to
    subnetting after defining what are IP addresses. if i find a good site i'll post it here.
    till then you can submit all of your queries here.
     
  12. dabud

    dabud Registered Member

    Joined:
    Feb 22, 2005
    Posts:
    4
    whooops AMRX you caught me [lol]
    no the 143 ip's are not really mine, just examples. It probably doesnt matter, but i am a little leary to give out correct ones. and yes the ip my isp gives me changes every time i restart computer. mainly i am just trying to get a better understanding of all these ip's and wot they mean, so i dont freak out and think someone is trying to get access to my machine.

    mishimasan:
    when i run ipconfig/all from command prompt i get:
    windows ip config
    hostname: grabow
    primary dns suffix: [blank]
    node type: unknown
    ip routing enabled: no
    wins proxy enabled: no

    Ethernet adapter Local Area Connection
    physical address: 00-E0-06-XX-XX-XX
    DHCP ENABLED: yes
    autoconfig enabled: yes
    autoconfig ip address: 169.254.xxx.xxx
    subnetmask: 255.255.0.0
    default gateway: [blank]

    PPP adapter [isp name]
    connection specific dns suffix: [blank]
    description: wan <ppp/slip> interface
    physical address: 00-53-00-00-45-xx
    dhcp enabled: no
    ip address: [the ip's here, i recognize as from my isp]
    subnet mask: 255.255.255.255
    default gateway: [the ip's here, i recognize as from my isp]
    dns servers:

    netbios over tcpip: disabled

    thank you All for the info thus far
     
  13. Arin

    Arin Registered Member

    Joined:
    May 1, 2004
    Posts:
    997
    Location:
    India
    dear dabud, my apologies, i should've known better then to think someone will really
    reveal their IP address in this forum. its not that using 143.x.x.x is illegal, its just not
    a good practise to use a class B address for your home computer. recent studies
    shows that class B IP addresses are the culprit for which we are losing IP addresses.
    untill IPv6 is implemented, we should be careful in choosing IP addresses.

    before i forget, let me congratulate you for disabling NetBios over TCP/IP. it was a
    security threat.
     
  14. `mishimasan`

    `mishimasan` Registered Member

    Joined:
    Feb 19, 2005
    Posts:
    209
    Location:
    London, England
    Nice. Just did it. Please explain why this is a security risk... I have read that it is an old protocol similar to DNS for IBM compatibility and such.. am I right?
     
  15. Arin

    Arin Registered Member

    Joined:
    May 1, 2004
    Posts:
    997
    Location:
    India
    yes, its used to share files in local network. with tcp/ip, it will let hacker's to get
    access to your computer through the Internet. though its an old threat, its better
    safe than to be sorry.
     
  16. `mishimasan`

    `mishimasan` Registered Member

    Joined:
    Feb 19, 2005
    Posts:
    209
    Location:
    London, England
Loading...
Thread Status:
Not open for further replies.