SNMPTRAPD(8)			   Net-SNMP			  SNMPTRAPD(8)



NAME
       snmptrapd - Receive and log SNMP trap messages.

SYNOPSIS
       snmptrapd [OPTIONS] [LISTENING ADDRESSES]

DESCRIPTION
       snmptrapd  is  an SNMP application that receives and logs SNMP TRAP and
       INFORM messages.

       Note: the default is to listen on UDP port 162 on all IPv4  interfaces.
       Since  162  is  a  privileged  port, snmptrapd must typically be run as
       root.

OPTIONS
       -a      Ignore authenticationFailure traps.

       -A      Append to the log file rather than truncating it.

	       Note that this needs to come before any	-Lf  options  that  it
	       should apply to.

       -c FILE Read FILE as a configuration file (or a comma-separated list of
	       configuration files).

       -C      Do not read any configuration files except the  one  optionally
	       specified by the -c option.

       -d      Dump (in hexadecimal) the sent and received SNMP packets.

       -D TOKEN[,...]
	       Turn  on	 debugging output for the given TOKEN(s).  Try ALL for
	       extremely verbose output.

       -f      Do not fork() from the calling shell.

       -F FORMAT
	       When logging to standard output, use the format in  the	string
	       FORMAT.	 See  the section FORMAT SPECIFICATIONS below for more
	       details.

       -h, --help
	       Display a brief usage message and then exit.

       -H      Display a list of configuration file directives	understood  by
	       the trap daemon and then exit.

       -I [-]INITLIST
	       Specifies  which	 modules should (or should not) be initialized
	       when snmptrapd starts up.  If the comma-separated  INITLIST  is
	       preceded	 with a '-', it is the list of modules that should not
	       be started.  Otherwise this is the list	of  the	 only  modules
	       that should be started.

	       To get a list of compiled modules, run snmptrapd with the argu-
	       ments -Dmib_init -H (assuming debugging support has  been  com-
	       piled in).

       -L[efos]
	       Specify where logging output should be directed (standard error
	       or output, to a file or via syslog).  See  LOGGING  OPTIONS  in
	       snmpcmd(1) for details.

       -m MIBLIST
	       Specifies  a  colon  separated  list of MIB modules to load for
	       this application.   This	 overrides  the	 environment  variable
	       MIBS.  See snmpcmd(1) for details.

       -M DIRLIST
	       Specifies  a  colon separated list of directories to search for
	       MIBs.  This overrides the environment  variable	MIBDIRS.   See
	       snmpcmd(1) for details.

       -n      Do  not attempt to translate source addresses of incoming pack-
	       ets into hostnames.

       -p FILE Save the process ID of the trap daemon in FILE.

       -O [abeEfnqQsStTuUvxX]
	       Specifies how MIB objects and other output should be displayed.
	       See  the	 section  OUTPUT OPTIONS in the snmpcmd(1) manual page
	       for details.

       -t      Do not log traps to syslog.  This disables logging  to  syslog.
	       This  is	 useful	 if you want the snmptrapd application to only
	       run traphandle hooks and not to log any traps to any location.

       -v, --version
	       Print version information for the trap daemon and then exit.

       -x ADDRESS
	       Connect to the AgentX master agent on  the  specified  address,
	       rather than the default "/var/agentx/master".  See snmpd(8) for
	       details of the format of such addresses.

       --name="value"
	       Allows  to  specify  any	 token	("name")  supported   in   the
	       snmptrapd.conf  file  and  sets its value to "value". Overrides
	       the  corresponding  token  in  the  snmptrapd.conf  file.   See
	       snmptrapd.conf(5) for the full list of tokens.

FORMAT SPECIFICATIONS
       snmptrapd  interprets format strings similarly to printf(3).  It under-
       stands the following formatting sequences:

	   %%  a literal %

	   %a  the contents of the agent-addr field of the PDU (v1 TRAPs only)

	   %A  the hostname corresponding to the contents  of  the  agent-addr
	       field  of  the PDU, if available, otherwise the contents of the
	       agent-addr field of the PDU (v1 TRAPs only).

	   %b  PDU source address (Note:  this	is  not	 necessarily  an  IPv4
	       address)

	   %B  PDU  source hostname if available, otherwise PDU source address
	       (see note above)

	   %h  current hour on the local system

	   %H  the hour field from the sysUpTime.0 varbind

	   %j  current minute on the local system

	   %J  the minute field from the sysUpTime.0 varbind

	   %k  current second on the local system

	   %K  the seconds field from the sysUpTime.0 varbind

	   %l  current day of month on the local system

	   %L  the day of month field from the sysUpTime.0 varbind

	   %m  current (numeric) month on the local system

	   %M  the numeric month field from the sysUpTime.0 varbind

	   %N  enterprise string

	   %q  trap sub-type (numeric, in decimal)

	   %P  security information from the PDU (community name  for  v1/v2c,
	       user and context for v3)

	   %t  decimal	number of seconds since the operating system epoch (as
	       returned by time(2))

	   %T  the value of the sysUpTime.0 varbind in seconds

	   %v  list of variable-bindings from the notification payload.	 These
	       will  be	 separated  by a tab, or by a comma and a blank if the
	       alternate form is requested See also %V

	   %V  specifies  the  variable-bindings  separator.  This   takes   a
	       sequence	 of  characters, up to the next % (to embed a % in the
	       string, use \%)

	   %w  trap type (numeric, in decimal)

	   %W  trap description

	   %y  current year on the local system

	   %Y  the year field from the sysUpTime.0 varbind

       In addition to these values, an optional field width and precision  may
       also be specified , just as in printf(3), and a flag value. The follow-
       ing flags are supported:

	   -   left justify

	   0   use leading zeros

	   #   use alternate form

       The "use alternate form" flag changes the behavior  of  various	format
       string sequences:

	      Time information will be displayed based on GMT (rather than the
	      local timezone)

	      The variable-bindings will be  a	comma-separated	 list  (rather
	      than a tab-separated one)

	      The  system  uptime  will be broken down into a human-meaningful
	      format (rather than being a simple integer)

   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"

LISTENING ADDRESSES
       By default, snmptrapd listens for incoming SNMP TRAP and INFORM packets
       on UDP port 162 on all IPv4 interfaces.	However,  it  is  possible  to
       modify  this behaviour by specifying one or more listening addresses as
       arguments to snmptrapd.	See the snmpd(8) manual page for more informa-
       tion about the format of listening addresses.

NOTIFICATION-LOG-MIB SUPPORT
       As  of  net-snmp	 5.0, the snmptrapd application supports the NOTIFICA-
       TION-LOG-MIB.  It does this by opening an AgentX subagent connection to
       the master snmpd agent and registering the notification log tables.  As
       long as the snmpd application is started first, it will	attach	itself
       to  it  and thus you should be able to view the last recorded notifica-
       tions  via  the	 nlmLogTable   and   nlmLogVariableTable.    See   the
       snmptrapd.conf file and the "dontRetainLogs" token for turning off this
       support.	 See the NOTIFICATION-LOG-MIB for more details about  the  MIB
       itself.

EXTENSIBILITY AND CONFIGURATION
       See the snmptrapd.conf(5) manual page.

SEE ALSO
       snmpcmd(1),  snmpd(8),  printf(3),  snmptrapd.conf(5), syslog(8), vari-
       ables(5)



4th Berkeley Distribution	  15 Jan 2004			  SNMPTRAPD(8)