UGN Security Forums
My ProfileMember DirectoryLogin
Search our ForumsView our FAQView our Site Rules
View our CalendarView our Active TopicsGo to our Main Page

UGN Security Store
 

Network Sites UGN Security, The GoNix Initiative, Elite Web Gamers, Back of the Web, EveryDay Helper, VNC Web Design & Development
August
Su M Tu W Th F Sa
1 2
3 4 5 6 7 8 9
10 11 12 13 14 15 16
17 18 19 20 21 22 23
24 25 26 27 28 29 30
31
Sponsored Links
Latest Postings
Amazon Gift Card Generator/KeyGen?te
by Gecko666
08/22/14 09:21 AM
Latest Reviews
Topic Options
Rate This Topic
#7367 - 04/16/04 01:52 AM portscanning
TH3 93n3$t34l3r Offline
Junior Member

Registered: 09/28/03
Posts: 47
Loc: geraldton
hey evrybody i might be asking a question that has already been answered but what does portscanning actually do thanks for all your help
_________________________
"Action may not always bring happiness; but ther is no happiness without action"

Top
Sponsored Links
      
#7368 - 04/16/04 03:01 AM Re: portscanning
Gremelin Offline

Community Owner
*****

Registered: 02/28/02
Posts: 7192
Loc: Portland, OR; USA
Port Scanning tells you what ports are open on a machine (may it be a personal computer or a web server).

Differant ports are opened by differant services, servers, and programs.

The ports can tell you what services someone is running as there are standard ports for differant types of servers (21, 23, 25 are all standard for their types).
_________________________
Donate to UGN Security here.
UGN Security, Back of the Web, Elite Web Gamers & VNC Web Design Owner

Top
#7369 - 04/16/04 04:00 AM Re: portscanning
Infinite Offline



Registered: 03/09/02
Posts: 1041
Loc: Canada eh
Different scans do different things. The man page for nmap explains a lot of them. I'll explain the most common type: Syn scanning.

First thing, ports occur within TCP or UDP. These are transport protocols that live at the transport layer (layer 4) of the OSI Model . IP is layer 3, ethernet is 2, etc.

Syn scanning uses the properties of TCP to dectect if a given port is open, closed, or filtered. TCP is a reliable protocol that establishes connections before any data is transmitted. TCP uses what's called a "3-Way handshake" to establish connections. The computer that wants to establish the session sends a SYN (Syncronize) packet to the computer it wants to talk to. If the ort is "open" on the recipient (accepting connections) it responds with a SYNACK (syncronize acknowledge). Finally the original computer send a ACK and the connection has been established and data may now flow.

So, when you SYn scan, you send a SYN packet to every port specified and see which ones are willing to establish a connection, hence are "open"

Infinite

Top
#7370 - 04/16/04 10:10 AM Re: portscanning
weeve Offline
UGN Super Poster

Registered: 10/29/02
Posts: 616
Loc: The Beach
_________________________
"Beware the Jabberwock, my son!
The jaws that bite, the claws that catch!
Beware the Jubjub bird, and shun
The frumious Bandersnatch!"

Top
#7371 - 04/17/04 02:23 AM Re: portscanning
TH3 93n3$t34l3r Offline
Junior Member

Registered: 09/28/03
Posts: 47
Loc: geraldton
thanks for all your help ppl

bye
_________________________
"Action may not always bring happiness; but ther is no happiness without action"

Top
#7372 - 04/17/04 06:03 PM Re: portscanning
weeve Offline
UGN Super Poster

Registered: 10/29/02
Posts: 616
Loc: The Beach
welcome, no bye needed.

see you later, all paths meet again.
_________________________
"Beware the Jabberwock, my son!
The jaws that bite, the claws that catch!
Beware the Jubjub bird, and shun
The frumious Bandersnatch!"

Top
#7373 - 04/26/04 08:21 AM Re: portscanning
TH3 93n3$t34l3r Offline
Junior Member

Registered: 09/28/03
Posts: 47
Loc: geraldton
good point
_________________________
"Action may not always bring happiness; but ther is no happiness without action"

Top
#7374 - 05/22/04 05:28 AM Re: portscanning
BackUnderground Offline
Junior Member

Registered: 05/22/04
Posts: 9
Loc: Australia
so you need the IP, port # then what? ive heard telnet works but is very basic. what do u suggest?
_________________________
trust no-one

Top
#7375 - 05/22/04 05:32 AM Re: portscanning
Ghost Offline


Registered: 06/16/03
Posts: 807
Loc: Wisconsin
To port scan someone, you need their ip address so you can send information to them. No you don't need a port number, as port scanning is designed to allow you to see which ports are open on a certain machine. Infinite posted some good information about how port syn scanning works in an above post. I don't know what telnet has to do with port scanning though.
_________________________
[[ GamerSupport ] [ UGN Security ] [ Evil Hosting ] [ Comic Relief ]
~[Ghost]

Top
#7376 - 05/23/04 06:08 AM Re: portscanning
BackUnderground Offline
Junior Member

Registered: 05/22/04
Posts: 9
Loc: Australia
nah i meant to get access to their computer
_________________________
trust no-one

Top
#7377 - 05/23/04 07:28 AM Re: portscanning
Ghost Offline


Registered: 06/16/03
Posts: 807
Loc: Wisconsin
How was i supposed to know what you meant? I mean, this is a thread devoted to port scanning, not connecting to someone with telnet. Also, no, connecting to someone with telnet does not give you access to their computer. For most services that give command line access you need a username and password.
_________________________
[[ GamerSupport ] [ UGN Security ] [ Evil Hosting ] [ Comic Relief ]
~[Ghost]

Top
#7378 - 05/23/04 08:07 AM Re: portscanning
Ntd Offline
Member

Registered: 01/21/03
Posts: 217
Loc: Melbourne, Victoria, Australia
Backunderground if you want to gain access i would suggest learning how to do a netbios attack or goto a site that list windows exploits and use them.

Note:: I think many people think that by connecting to a remote computer is "Hacking" the other computer. That is wrong, telnet only connects you to the remote like, say, internet explorer does.

Top
#7379 - 05/24/04 03:44 PM Re: portscanning
BackUnderground Offline
Junior Member

Registered: 05/22/04
Posts: 9
Loc: Australia
thats what i wanted to know cheers,
sorry this is my 1st bbs
_________________________
trust no-one

Top

Moderator:  Infinite 
Featured Member
Registered: 08/20/13
Posts: 1
Forum Stats
2148 Members
46 Forums
34017 Topics
69184 Posts

Max Online: 1567 @ 04/25/10 02:20 AM
Top Posters
UGN Security 27179
Gremelin 7192
§intå× 3255
SilentRage 1273
Ice 1146
pergesu 1136
Infinite 1041
jonconley 955
Girlie 908
unreal 860
Newest Members
Gecko666, defghi795767, Devo60, ali, lavos
2147 Registered Users
Who's Online
1 registered (Tim050), 278 Guests and 290 Spiders online.
Key: Admin, Global Mod, Mod
Latest News


Donate
  Get Firefox!
Get FireFox!