Description:

  This tool sniffs and displays some basic network statistics.
  It supports 7 groups: Ethernet/link, ARP, IPv4, IPv6, UDP, TCP, ICMP.
  For each one, it displays: packet count (count), sum of packet sizes
  (size), percentage of packet count (c%) and percentage of size (s%).
  Display is updated at most every second.
  
  Parameter --device indicates on which device to sniff. Please note
  that under some systems, such as Windows, sniffing on some devices is
  not supported.
  Parameter --filter defines the sniff filter. It permits to restrict
  captured packets. This kind of filter is named a BPF or pcap filter.
  Basic elements of a filter are:
    host 1.2.3.4
    net 192.168.10
    net 192.168.10.0 mask 255.255.255.0
    net 192.168.10.0/24
    port 21
    dst host 1.2.3.4
    src port 2345
    ether host a:b:c:d:e:f ('ether a:b:c:d:e:f' is not working)
    ether src aa:bb:cc:dd:ee:ff
    ip
    arp
    rarp
    tcp
    icmp
    udp
  Here are filter examples:
    "host 1.2.3.4"
    "net 192.168 and icmp"
    "host 1.2.3.4 or dst port 80"
    "(udp or tcp) and not host 1.2.3.4"
   

Synonyms:

Usage:

Parameters:

Example: