Port Scanner

2.0.1

Scan open ports using 'TCP SYN' scanning technique.

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Not rated yet
Version:

2.0.1
Publisher:

SecurityXploded
Date added:

Apr 9, 2010
Operating systems:

Windows XP,Vista
File size:

0.14 MB
File name:

Not available
Total downloads:

45
License:

Freeware
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Port Scanner Description

There are various port scanners which uses simple method of scanning. These applications uses the normal connect method to scan open ports and it takes long time. This scanner is faster than normal scanner as it uses faster 'TCP Half Open' Scanning or 'TCP SYN' scanning technique. This method is less detectable than the simple port scanner.

Core part of the implementation is sending the TCP packet and ARP packet. This involves building the raw packet by filling all headers. For this we must know MAC address of the source and destination machine. MAC address also called Ethernet address, is the address associated with Ethernet adapter.

There are various methods for obtaining the source MAC address. This method is simple. IP_ADAPTER_INFO adapter[5]; DWORD buflen=sizeof(adapter); DWORD status=GetAdaptersInfo(adapter,&buflen);

Now the adapter structure contain the source MAC address.

This is done by sending ARP packet. ARP packet is used to determine the host's MAC address when its IP address is known. First ARP request packet is sent by specifying the source MAC address, source IP address and destination IP Address. The ARP reply packet contains the destination MAC address. This method also prevents the target host from sending ARP packet to source host when the source host sends the first SYN packet during scanning process. From the ARP request packet that we have sent, target host will come to know about the MAC address of the source host.

Scanning process involves building TCP packet. For this one has to prepare the Ethernet Header, IP header and TCP header. Header file 'packet.h' contains the format details for each of these headers. You can refer RFC for details regarding these formats.

Each time during scanning TCP SYN packet is sent with different port numbers. Then the corresponding reply packet is checked for the flag RST+ACK or SYN+ACK. Based upon this flag target port status is determined.

Soft-Go is not responsible for the content of Port Scanner publisher's description. We encourage you to determine whether this product or your intended use is legal. We do not encourage or condone the use of any software in violation of applicable laws.

Any form of support or technical problems regarding Port Scanner must be addressed to its developer/publisher. Please be aware that we do NOT provide Port Scanner cracks, serial numbers, registration codes or any forms of pirated software downloads.

Port Scanner Related Searches

port scanner, free port scanner, port scanning, open ports

Port Scanner Download Note

Port Scanner is periodically updated by our editors team but sometimes you may find out that software informations are outdated, please note that the publisher of Port Scanner can update the software without notifying us. Current version of Port Scanner is 2.0.1.

Note: Soft-Go doesn't provide any form of technical support regarding Port Scanner, however, you may find answer to your problem by reading user reviews or directly contacting SecurityXploded which's the publisher/developer of this software.