icmpinfo(8) - phpMan

ICMPINFO(8)                          System Manager's Manual                          ICMPINFO(8)

NAME
       icmpinfo - interpret ICMP messages

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

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_unreach-
       able.

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 unat-
              tended 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. Useful only if your host  has  sev-
              eral  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  (recommended  use).   (root
              only option).

       -k     Kills the background process started with the -l 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 AT hplyot.fr>. Free software.

dl's free utilities                   V1.11 - 28 August 1995                          ICMPINFO(8)

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