Scan network

The Scan network tool lets you check for running hosts in a selected network. It lists all the nodes and services running on them.

First, netTools discovers all running nodes with ICMP (Ping). So it can discover only the nodes that reply to such requests. Then it scans for services running on every available node. While scanning the service running on a discovered node, netTools sends a request and checks if the response matches specific criteria, which makes sure that a specific service is running on the port. This is important if more that one service may be using the selected port. It can scan services using both TCP and UDP.

To start scanning a network

1.	Select Scan network tool on the navigation bar.

2.	Enter the host DNS name or IP address in the address bar. netTools will scan the class C network containing this host. E.g., if you enter 192.168.0.34, then the program will scan the 255 addresses between 192.168.0.1 and 192.168.0.254.

3.	Click the Scan button or press Enter.

scan_network_window

Information provided

The main grid shows information about discovered hosts and services running or open ports. When you select a host on the list, you can see information about discovered ports/services in the Host Information section on the sidebar.

Information about the number of hosts checked and running is also available in the Information section on the sidebar.

Options

Options allow you to change timeout and choose to scan hosts only, or services or ports as well:

Option	Description
Hosts only	With this option, netTools will check only for running hosts. No other scanning will be performed.
Services	netTools will discover all services running on the host. It sends specific service requests and checks whether the response meets the defined pattern.
Ports (well known)	This option lets you scan for all the open ports defined on the well known port list.
Ports (well known - extended)	The same as the well known option, but it also includes many rarely-used services.
Ports (range)	Scans a defined range of ports.

Note

•	You can copy the name or IP of the selected host to clipboard. Just right click the host name and select Copy IP Address or Copy DNS Name from the popup menu.

•	Next to the device name, the geographic location (country) of the remote IP address is presented.

•	MAC address is filled on the basis of data contained in ARP table in Local info and SNMP data.