admin
06-10-2003, 08:29 AM
ScanUDP V?.?, Improved UDP Scanning Tool
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This simple program written in C for Linux scan for UDP ports in remote hosts,
determining which UDP services they are offering. All UDP scanners that Fryxar
tried work with the following principle:
UDP datagram -> Closed Port -> ICMP Port Unreachable
UDP datagram -> Open Port -> No Reply (or application dependent)
But, if the scanned devices are behind a firewall, all the ports will seem open.
So, what scanudp does is to send "dependend protocol packets", and wait for the
application response. To insert new "dependen protocol packets", simple modify
the "port" variable array.
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-----------------------------------------------------------------------------
This simple program written in C for Linux scan for UDP ports in remote hosts,
determining which UDP services they are offering. All UDP scanners that Fryxar
tried work with the following principle:
UDP datagram -> Closed Port -> ICMP Port Unreachable
UDP datagram -> Open Port -> No Reply (or application dependent)
But, if the scanned devices are behind a firewall, all the ports will seem open.
So, what scanudp does is to send "dependend protocol packets", and wait for the
application response. To insert new "dependen protocol packets", simple modify
the "port" variable array.
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