SNMPTRAPD(8)SNMPTRAPD(8)NAMEsnmptrapd - Receive and log snmp trap messages.
SYNOPSISsnmptrapd [-h] [-P] [-s] [-p port] [-d] [-e] [-D tokens]
[-l [d0-7]] [-f] [-H] [-a] [-O oidopts] [-C] [-c confFile]
[-F FORMAT]
DESCRIPTION
Snmptrapd is an SNMP application that receives and logs
snmp trap messages sent to the SNMP-TRAP port (162) on the
local machine.
The log messages are of the form:
Sep 17 22:39:52 suffern snmptrapd: 128.2.13.41: Cold Start
Trap (0) Uptime: 8 days, 0:35:46
Snmptrapd must be run as root so that UDP port 162 can be
opened.
COMMAND LINE ARGUMENTS-h Print a usage summary and exit.
-P Print the logged messages to stdout.
-p port
Specifies the port to run on, if the default 162 is
not desired.
-s Log the messages to syslog(8). These syslog mes
sages are sent with the level of LOG_WARNING, and
to the LOG_LOCAL0 facility (by default). The demon
will also fork away from its caller when the syslog
facilities are used. This is the default unless
the '-P' flag is used.
-l [d0-7]
Specifies the syslog facility to use, demon or
local[0-7].
-a makes snmptrapd ignore AuthenticationFailure traps
-d Causes the application to dump input and output
packets.
-D Turn debugging output on.
-f Don't fork away from the caller when using sys
log().
-O oidopts
Set OID printing options (see snmpcmd(1))
-C Don't read the default set of configuration files.
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SNMPTRAPD(8)SNMPTRAPD(8)-c confFile
Force the reading of confFile as a configuration
file.
-F FORMAT
When logging to standard output, use the format in
the string FORMAT.
FORMAT is a printf-like string. Snmptrapd interprets the
following formatting sequences:
%% a literal %
%t decimal number of seconds since the operating sys
tem's epoch
%y current year
%m current (numeric) month
%l current day of month
%h current hour
%j current minute
%k current second
%T up-time in seconds (in decimal)
%Y the year field from the up-time
%M the numeric month field from the up-time
%L the day of month field from the up-time
%H the hour field from the up-time
%J the minute field from the up-time
%K the seconds field from the up-time
%A agent's hostname if available, otherwise IP address
%a agent's IP address
%B PDU's hostname if available, otherwise IP address
%b PDU's IP address
%N Enterprise string
%w Trap type (numeric, in decimal)
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SNMPTRAPD(8)SNMPTRAPD(8)
%W Trap description
%q Trap sub-type (numeric, in decimal)
%P Security information from the PDU (community name
for v1/v2c, user and context for v3)
%v list of trap's variables
In addition to these values, you may also specify an
optional field width and precision, just as in printf, and
a flag value. The following flags are legal:
- left justify
0 use leading zeros
# use alternate form
The "use alternate form" flag changes the behavior of some
format flags. Normally, the fields that display time
information base it on the local time, but this flag tells
them to use GMT instead. Also, the variable list is nor
mally a tab-separated list, but this flag changes it to a
comma-separated one. The alternate form for the uptime is
similar to "3 days, 0:14:34.65"
Examples:
To get a message like "14:03 TRAP3.1 from humpty.ucd.edu"
you could use something like this:
snmptrapd-P -F "%02.2h:%02.2j TRAP%w.%q from %A\n"
If you want the same thing but in GMT rather than local
time, use
snmptrapd-P-F "%#02.2h:%#02.2j TRAP%w.%q from
%A\n"
EXTENSIBILITY AND CONFIGURATION
See the snmptrapd.conf(5) manual page.
SEE ALSOsnmpcmd(1), syslog(8), variables(5)
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