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: 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
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 message.
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 representing the packet contents after the headers.
-D
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.
-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.
-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 information.
-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.
See attributes(7) for descriptions of the following
attributes:
| ATTRIBUTE
TYPE |
ATTRIBUTE VALUE |
| Interface Stability |
Committed |
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.