#7369 - 04/16/04 11:00 AM
Re: portscanning
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Joined: Mar 2002
Posts: 1,041
Infinite
UGN Elite Poster
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UGN Elite Poster
Joined: Mar 2002
Posts: 1,041
Canada eh
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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
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#7371 - 04/17/04 09:23 AM
Re: portscanning
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Joined: Sep 2003
Posts: 47
TH3 93n3$t34l3r
Junior Member
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Junior Member
Joined: Sep 2003
Posts: 47
geraldton
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thanks for all your help ppl
bye
"Action may not always bring happiness; but ther is no happiness without action"
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#7374 - 05/22/04 12:28 PM
Re: portscanning
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Joined: May 2004
Posts: 9
BackUnderground
Junior Member
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Junior Member
Joined: May 2004
Posts: 9
Australia
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so you need the IP, port # then what? ive heard telnet works but is very basic. what do u suggest?
trust no-one
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#7376 - 05/23/04 01:08 PM
Re: portscanning
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Joined: May 2004
Posts: 9
BackUnderground
Junior Member
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Junior Member
Joined: May 2004
Posts: 9
Australia
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nah i meant to get access to their computer
trust no-one
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#7379 - 05/24/04 10:44 PM
Re: portscanning
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Joined: May 2004
Posts: 9
BackUnderground
Junior Member
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Junior Member
Joined: May 2004
Posts: 9
Australia
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thats what i wanted to know cheers, sorry this is my 1st bbs
trust no-one
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Okay WTF?
by HenryMiring on 09/27/17 08:45 AM
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