Skip site navigation (1)Skip section navigation (2)

FreeBSD Manual Pages

  
 
  

home | help
ICMPINFO(1)		    General Commands Manual		   ICMPINFO(1)

NAME
       icmpinfo	- interpret ICMP messages

SYNOPSIS
       icmpinfo	[-v[v[v]]] [-n]	[-p] [-s] [-l]

DESCRIPTION
       Icmpinfo	 is  a	tool  for looking at the ICMP messages received	on the
       running host.  It can be	used to	detect and record 'bombs' as  well  as
       various network problems.

       The output format is as follows (all on one line):

	 MMM DD	HH:MM:SS ICMP_type[sub-type]
	    < sender_ip	[sender_name] >	unreach_ip [unreach_name]
	    sp=source_port dp=dest_port	seq=sequence sz=packet_size

       In  normal  operation,  icmpinfo	 will  only report on "weird" packets,
       mainly icmp_unreachable.

OPTIONS
       -v     Give information about all icmp packets, excepts pings.

       -vv    Give about pings too (i.e. icmp_echo_reply).

       -vvv   Include an ascii/hex dump	of each	packet

       -n     Avoid name queries - just	give IP	addresses.  (use  this	option
	      when  running unattended on name server hosts (to	avoid possible
	      looping))

       -p     Avoid port number	to service name	decoding.

       -s     Show the interface ip that received the packet. Usefull only  if
	      your  host  has  several	network	interfaces. In this case an '-
	      my_ip [my_name]' is added	between	the sender and unreach ip  and
	      name fields.

       -l     Forks  and  use  the  syslog(3)  facility	 to record events (re-
	      comended use).  (root only option).

WARNINGS
       The packet decoding is planned for ICMP Unreachable outputs  and	 might
       not be significant for all other	Icmp types. Output can be shorter when
       implied by the packet size or the icmp type.

AUTHOR
       Laurent Demailly	<dl@hplyot.obspm.fr>. Free software.

dl's free utilities	    V1.11 - 17 August 1995		   ICMPINFO(1)

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | WARNINGS | AUTHOR

Want to link to this manual page? Use this URL:
<https://www.freebsd.org/cgi/man.cgi?query=icmpinfo&sektion=1&manpath=FreeBSD+12.1-RELEASE+and+Ports>

home | help