This scaner can be used for scan range of IP addresses and find
presentce of used addresses by DNS, PING, ARP quering. Also you can scan one or
range of addresses and find opened TCP and UDP ports. Port scanning can be
extended by scripts.
- DNS scanning - scaner will try to resolve names of all addresses in
specified range(s). Resolved addresses and their names will be addres to
list of found addresses.
- PING scanning - scaner will send ICMP echo requestes to all addresses in
specified range(s). Thos of them that send back ICMP answer will be added.
Option Resolve hostnames forces scaner to try to resolve hostnames of found
addresses,
- ARP scanning - scaner will send ARP requestes. ARP protocol used to
resolve MAC address of the given IP. ARP request is the broadcast request
and those this scan works only for hosts wich are in the same network
segment with you.
- TCP port scanning - scaner tries to estabilish connection to all specified
ports of specified IP addresses. On find opened ports scaner looks in
nvscripts.ini if thereis any script assigned to found TCP port and if it is
so then start script, if no script assigned then scaner simple adds found
address and port to the list of found resources. Also scaner tre to get any
data that remote side send after connection estabilished and display it in
the Responce column.
- UDP port scanning - scaner sends UDP packets to all specified ports of
specified IP addresses. After this scaner wait specified timeout and tries
and found wich tries was rejected by ICMP port unreachable message. So if
host is offline or firewalled then all ports will be found as opened. On
find opened ports scaner looks in nvscripts.ini if there is any script
assigned to found UDP port and if it is so then start script, if no script
assigned then scaner simple adds found address and port to the list of found
resources. Also scaner tre to get any data that remote side send after
connection estabilished and display it in the Responce column.
Having scanned a heap of machines for example by DNS, PING or ARP scanning it is possible to bring in them
to default hostlist or to keep results in a file - for this purpose click the right button of the mouse on the table of results and choose Save to file.
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