Re: Scan until open port is found

[Diman Todorov <diman.todorov () chello at>]

On 10.11.2006, at 10:54, Hans Nilsson wrote:

> Hello! Is there any way to just scan until one open port is found and
> then stop?

Yes there is a way:
sudo nmap -sP -PS22,80,113 hostname

This will send SYN packets to all three ports and will stop if any of  
the ports replies with a SYN/ACK. Alternatively you can use -PA which  
will do a three way handshake. If you want to know which port was  
open you need to use --packet-trace (at least until the --reason  
project is incorporated into the nmap core)

cheers
Diman

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