Port Scanner

[xruxru]

Hey All
I need Your help!
I have to implement port scanner, which will scan using SYN, FIN, ACK packets.
Could somebody post an example on C#.
How could I build the suitable header and how to get and check the answer?

Thanks

[ittar]

Dear xruxru,

I have code in c++ if you still want it. but you will have to import some DLLs. I am also working on port scanning but my project is a bit different. I am trying to construct raw packet with different flags on. If you have some information on that please share with me.

Thanking You,
Ittar Waqas

Hey All
I need Your help!
I have to implement port scanner, which will scan using SYN, FIN, ACK packets.
Could somebody post an example on C#.
How could I build the suitable header and how to get and check the answer?

Thanks

[rswarnkar]

hi,
I have used the following code for port scanner
================================================== =
ArrayList ports = new ArrayList();
for( int i=1 ; i<65555; i++)
{
try{
TcpClient c = new TcpClient( remote_ip, i);
c.Close()
ports.Add( i);
}catch{}
}=============================================

but when I run this code with a remote IP, it gives a message that Remote machine has actively refused connection.
what should I do now? Please help me out.

Thanks in Advance,
-rajesh