ipmon(1M) System Administration Commands ipmon(1M)NAMEipmon - monitors /dev/ipl for logged packets
SYNOPSISipmon [-abDFhnpstvxX] [-N device] [ [o] [NSI]] [-O [NSI]]
[-P pidfile] [-S device] [-f device] [filename]
DESCRIPTION
The ipmon command is part of a suite of commands associated with the
Solaris IP Filter feature. See ipfilter(5).
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 out‐
put 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(1M). Messages sent by means of syslog have the day, month,
and year removed from the message, but the time (including microsec‐
onds), 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 mes‐
sage 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 ipf‐
stat -in for output rules. See ipfstat(1M).
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:
209.53.17.22,80 → 198.73.220.17,1722.
o PR followed by the protocol name or number, for example, PR
tcp.
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 start‐
ing with a hyphen followed by letters corresponding to any flags that
were set. See ipf.conf(4) 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 sub‐
message type, separated by a slash. For example, icmp 3/3 for a port
unreachable message.
OPTIONS
The following options are supported:
-a
Open all of the device logfiles for reading log entries. All
entries are displayed to the same output device (stderr or syslog).
-b
For rules which log the body of a packet, generate hex output rep‐
resenting the packet contents after the headers.
-D
Cause ipmon to turn itself into a daemon. Using subshells or back‐
grounding 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.
-F
Flush the current packet log buffer. The number of bytes flushed is
displayed, even if the result is zero.
-h
Displays usage information.
-n
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
device.
-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.
-p
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
/var/run/ipmon.pid.
-s
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:
LOG_INFO
Packets logged using the log keyword as the action rather than
pass or block.
LOG_NOTICE
Packets logged that are also passed.
LOG_WARNING
Packets logged that are also blocked.
LOG_ERR
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 device.
-t
Read the input file/device in the way performed by tail(1).
-v
Show TCP window, ack, and sequence fields
-x
Show the packet data in hex.
-X
Show the log header record data in hex.
FILES
o /dev/ipl
o /dev/ipnat
o /dev/ipstate
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
┌─────────────────────────────┬─────────────────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├─────────────────────────────┼─────────────────────────────┤
│Availability │SUNWipfu │
├─────────────────────────────┼─────────────────────────────┤
│Interface Stability │Evolving │
└─────────────────────────────┴─────────────────────────────┘
SEE ALSOipf(1M), ipfstat(1M), ipnat(1M), attributes(5), ipfilter(5)DIAGNOSTICSipmon 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.
NOTES
To view license terms, attribution, and copyright for IP Filter, the
default path is /usr/lib/ipf/IPFILTER.LICENCE. If the Solaris operating
environment has been installed anywhere other than the default, modify
the given path to access the file at the installed location.
SunOS 5.10 28 Jan 2008 ipmon(1M)
