IPMON(8) Maintenance Procedures IPMON(8)


ipmon - monitors /dev/ipl for logged packets


ipmon [-abDFhnpstvxX] [-N device] [ [o] [NSI]] [-O [NSI]]
[-P pidfile] [-S device] [-f device] [-G | -z zonename] [filename]


The ipmon command is part of a suite of commands associated with the
Solaris IP Filter feature. See ipfilter(7).

The ipmon command opens /dev/ipl for reading and awaits data to be saved
from the packet filter. The binary data read from the device is reprinted
in human readable form. However, IP addresses are not mapped back to
hostnames, nor are ports mapped back to service names. The output goes to
standard output, by default, or a filename, if specified on the command
line. Should the -s option be used, output is sent instead to syslogd(8).
Messages sent by means of syslog have the day, month, and year removed
from the message, but the time (including microseconds), as recorded in
the log, is still included.

Messages generated by ipmon consist of whitespace-separated fields.
Fields common to all messages are:

o The date of packet receipt. This is suppressed when the
message is sent to syslog.

o The time of packet receipt. This is in the form HH:MM:SS.F,
for hours, minutes, seconds, and fractions of a second (which
can be several digits long).

o The name of the interface on which the packet was processed,
for example, ib1.

o The group and rule number of the rule, for example, @0:17.
These can be viewed with ipfstat -in for input rules or
ipfstat -in for output rules. See ipfstat(8).

o The action: p for passed, b for blocked, s for a short packet,
n did not match any rules, or L for a log rule.

o The addresses. This is actually three fields: the source
address and port (separated by a comma), the symbol ->, and
the destination address and port. For example:,80 ->,1722.

o PR followed by the protocol name or number, for example, PR

o len followed by the header length and total length of the
packet, for example, len 20 40.

If the packet is a TCP packet, there will be an additional field starting
with a hyphen followed by letters corresponding to any flags that were
set. See ipf.conf(5) for a list of letters and their flags.

If the packet is an ICMP packet, there will be two fields at the end, the
first always being icmp, the next being the ICMP message and submessage
type, separated by a slash. For example, icmp 3/3 for a port unreachable


The following options are supported:


Open all of the device logfiles for reading log entries. All entries
are displayed to the same output device (stderr or syslog).


For rules which log the body of a packet, generate hex output
representing the packet contents after the headers.


Cause ipmon to turn itself into a daemon. Using subshells or
backgrounding of ipmon is not required to turn it into an orphan so
it can run indefinitely.

-f device

Specify an alternative device/file from which to read the log
information for normal IP Filter log records.


Flush the current packet log buffer. The number of bytes flushed is
displayed, even if the result is zero.


Displays usage information.


IP addresses and port numbers will be mapped, where possible, back
into hostnames and service names.

-N device

Set the logfile to be opened for reading NAT log records from or to

-o letter

Specify which log files from which to actually read data. N, NAT
logfile; S, state logfile; I, normal IP Filter logfile. The -a option
is equivalent to using -o NSI.

-O letter

Specify which log files you do not wish to read from. This is most
commonly used in conjunction with the -a. Letters available as
parameters are the same as for -o.


Cause the port number in log messages always to be printed as a
number and never attempt to look it up.

-P pidfile

Write the PD of the ipmon process to a file. By default this is


Packet information read in will be sent through syslogd rather than
saved to a file. The default facility when compiled and installed is
local0. The following levels are used:


Packets logged using the log keyword as the action rather than
pass or block.


Packets logged that are also passed.


Packets logged that are also blocked.


Packets that have been logged and that can be considered "short".

-S device

Set the logfile to be opened for reading state log records from or to


Read the input file/device in the way performed by tail(1).


Show TCP window, ack, and sequence fields


Show the packet data in hex.


Show the log header record data in hex.

-z zonename

Monitor packets the specified zone's in-zone filter. If neither this
option nor -G is specified, the current zone is used. This command is
only available in the Global Zone. See ZONES in ipf(8) for more

-G zonename

Monitor packets for the specified zone's global zone controlled
filter. If neither this option nor -z is specified, the current zone
is used. This command is only available in the Global Zone. See ZONES
in ipf(8) for more information.


o /dev/ipl

o /dev/ipnat

o /dev/ipstate


See attributes(7) for descriptions of the following attributes:

|Interface Stability | Committed |


attributes(7), ipfilter(7), zones(7), ipf(8), ipfstat(8), ipnat(8)


ipmon expects data that it reads to be consistent with how it should be
saved and aborts if it fails an assertion which detects an anomaly in the
recorded data.

illumos October 30, 2013 IPMON(8)