IP scanning
Page 1 of 2 12 LastLast
Results 1 to 10 of 15

Thread: IP scanning

  1. #1
    haraam77
    Guest

    Question IP scanning

    I am wanting to know anything you all can tell me about IP scanning. How is it done? Is it illeagal? Why would someone IP scan anyway???

  2. #2
    IT Specialist Ghost_25inf's Avatar
    Join Date
    Sep 2001
    Location
    Michigan
    Posts
    648
    IP scanning is not illegal.
    S25vd2xlZGdlIGlzIHBvd2VyIQ

  3. #3
    Flash M0nkey
    Join Date
    Sep 2001
    Posts
    3,447
    IP scanning is not illegal.
    that maybe so but alot of isps will have written into their terms and conditions some place that they can remove your account for ip scanning......

    my knowledge on the subject is a lil patchy but as far as I understand it is mostly used to find open ports on computers - like say you wanted to find someone infected with Sub7 then you would scan an ip range for any computers with port 27374 open (I know the default port for Sub7 changed with version 2.2 but I can't remember what to >_<) Your computer sends information to that port on the computers within the ip range you specified and awaits a reply - if the port is infecte with sub7 it sends a signal back to your computer and you ip scanner alerts you off this....

    heh told you it was patchy but i hope it is off some help

    v_Ln

  4. #4
    IT Specialist Ghost_25inf's Avatar
    Join Date
    Sep 2001
    Location
    Michigan
    Posts
    648
    yes but he was asking about scanning in general not a port scan.
    S25vd2xlZGdlIGlzIHBvd2VyIQ

  5. #5
    Senior Member
    Join Date
    Dec 2001
    Posts
    321
    ip scanning is not welcomed by you major isp... they'll generaly call you within the second or third intensive scan you perform on them.... unless you are being reported then byebye...
    it is not illegall but it is not considered normal for anybody to do it since there are no vaalid reasons to be scanning from home. from work it's a different thing i work for a networking comp and i have 4 scan running at the same time hehehe and no problem it's my job...

    so if you want to have some fun with scanning get a local isp the less tech support they have the better off you are since they won't even pay attention to the logs hehehe or you can simply call them up and team up whith the dude ( a 12 packs helps alot) ...
    assembly.... digital dna ?

  6. #6
    Flash M0nkey
    Join Date
    Sep 2001
    Posts
    3,447
    so was I
    I know from experience that some Isp's will remove your account for ip scanning - isn't a biggie really just annoying

    v_Ln

  7. #7
    Hi mom!
    Join Date
    Aug 2001
    Posts
    1,103
    IP-scanning, or portscanning, has to do with looking for open ports on computers. Every computer connected to the internet has it's own number, the IP-number. If you want to check any of this, you can use the number 127.0.0.1 - it's the number each computer assigns to itself (useful for testing stuff). Each computer has a bunch (256x256) ports, they are all numbered - if you compare your computer with a house, the IP-number is the housenumber, and each port is a door.

    Processes or programs that use the network use one of these ports - so, by checking if a computer has a port open (a door unlocked) you can tell which programs the computer is running (and use that to your advantage). You can do this two ways - You want to know which ports are open on a specific computer: in this case, you want to scan all ports (check all doors) on one IP-address. You can also be looking for computers that are running a program - in that case, you scan a range of IP-adresses for one specific port.

    If you want to check your computer for the ports you are using, open a dosbox (I'm assuming you're using windows) and type: netstat -a

    If you want to scan other computers, you probably want to download a portscanner - you can find enough of those on the internet, use a search engine.

    If you want to get a simplistic, but really clear view on how information is transmitted from your computer over the internet, I really recommend watching the movie Warriors of the Net - I showed it to some of my computer-illiterate friends, and they all got the idea pretty quick.
    I wish to express my gratitude to the people of Italy. Thank you for inventing pizza.

  8. #8
    Senior Member
    Join Date
    Jan 2002
    Posts
    458
    Port scanning is not illegal, but it is frowned upon by many security people. If you get caught scanning a network, you should be prepared for a nasty email to you or your ISP. Your ISP may then cut off service due to an acceptable use policy.

    Vulnerability scanners such as nessus may be a different story, because they are actually checking for specific vulnerabilities. I am not exactly sure what the legal aspects of this are, but I would be careful.

    IP scanning (Ping sweep) to just find out what IP's are alive is no problem at all. Do it all you want..

  9. #9
    Junior Member
    Join Date
    Feb 2002
    Posts
    4
    it's done with programs...i.e in linux you use the nmap command
    -+=pHr3K=+-

  10. #10
    Senior Member
    Join Date
    Jan 2002
    Posts
    218
    port scanning is a real good idea if you want to get some people pist at you. other thatn that, i would not adivise abusing it. using it on your own systems is good. you can find any open ports you might have, etc.
    \"Computer games don\'t affect kids; I mean if Pac-Man affected us as kids, we\'d all be running around in darkened rooms munching magic pills and listening to repetitive electronic music.\" Kristian Wilson, Nintendo, Inc. 1989

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

 Security News

     Patches

       Security Trends

         How-To

           Buying Guides