-h, --help (Display help)
Displays help information and exits.
-V, --version (Display version)
Displays the program's version number and quits.
-c rounds, --count rounds (Stop after a given number of rounds)
This option lets you specify the number of times that Nping
should loop over target hosts (and in some cases target
ports). Nping calls these 'rounds'. In a basic execution with
only one target (and only one target port in TCP/UDP modes),
the number of rounds matches the number of probes sent to the
target host. However, in more complex executions where Nping
is run against multiple targets and multiple ports, the
number of rounds is the number of times that Nping sends a
complete set of probes that covers all target IPs and all
target ports. For example, if Nping is asked to send TCP SYN
packets to hosts 192.168.1.0-255 and ports 80 and 433, then
256 × 2 = 512 packets are sent in one round. So if you
specify -c 100, Nping will loop over the different target
hosts and ports 100 times, sending a total of 256 × 2 ×
100 = 51200 packets. By default Nping runs for 5 rounds. If a
value of 0 is specified, Nping will run continuously.
-e name, --interface name (Set the network interface to be used)
This option tells Nping what interface should be used to send
and receive packets. Nping should be able to detect this
automatically, but it will tell you if it cannot. name must
be the name of an existing network interface with an assigned
IP address.
--privileged (Assume that the user is fully privileged)
Tells Nping to simply assume that it is privileged enough to
perform raw socket sends, packet sniffing, and similar
operations that usually require special privileges. By
default Nping quits if such operations are requested by a
user that has no root or administrator privileges. This
option may be useful on Linux, BSD or similar systems that
can be configured to allow unprivileged users to perform
raw-packet transmissions. The NPING_PRIVILEGED environment
variable may be set as an alternative to using --privileged.
--unprivileged (Assume that the user lacks raw socket privileges)
This option is the opposite of --privileged. It tells Nping
to treat the user as lacking network raw socket and sniffing
privileges. This is useful for testing, debugging, or when
the raw network functionality of your operating system is
somehow broken. The NPING_UNPRIVILEGED environment variable
may be set as an alternative to using --unprivileged.
--send-eth (Use raw ethernet sending)
Asks Nping to send packets at the raw ethernet (data link)
layer rather than the higher IP (network) layer. By default,
Nping chooses the one which is generally best for the
platform it is running on. Raw sockets (IP layer) are
generally most efficient for Unix machines, while ethernet
frames are required for Windows operation since Microsoft
disabled raw socket support. Nping still uses raw IP packets
despite this option when there is no other choice (such as
non-ethernet connections).
--send-ip (Send at raw IP level)
Asks Nping to send packets via raw IP sockets rather than
sending lower level ethernet frames. It is the complement to
the --send-eth option.
--bpf-filter filter spec --filter filter spec (Set custom BPF
filter)
This option lets you use a custom BPF filter. By default
Nping chooses a filter that is intended to capture most
common responses to the particular probes that are sent. For
example, when sending TCP packets, the filter is set to
capture packets whose destination port matches the probe's
source port or ICMP error messages that may be generated by
the target or any intermediate device as a result of the
probe. If for some reason you expect strange packets in
response to sent probes or you just want to sniff a
particular kind of traffic, you can specify a custom filter
using the BPF syntax used by tools like tcpdump. See the
documentation at http://www.tcpdump.org/
-H, --hide-sent (Do not display sent packets)
This option tells Nping not to print information about sent
packets. This can be useful when using very short inter-probe
delays (i.e., when flooding), because printing information to
the standard output has a computational cost and disabling it
can probably speed things up a bit. Also, it may be useful
when using Nping to detect active hosts or open ports (e.g.
sending probes to all TCP ports in a /24 subnet). In that
case, users may not want to see thousands of sent probes but
just the replies generated by active hosts.
-N, --no-capture (Do not attempt to capture replies)
This option tells Nping to skip packet capture. This means
that packets in response to sent probes will not be processed
or displayed. This can be useful when doing flooding and
network stack stress tests. Note that when this option is
specified, most of the statistics shown at the end of the
execution will be useless. This option does not work with TCP
Connect mode.
