SNMPD(8)                           Net-SNMP                           SNMPD(8)


       snmpd - daemon to respond to SNMP request packets.




       snmpd  is  an SNMP agent which binds to a port and awaits requests from
       SNMP management software.  Upon receiving a request, it  processes  the
       request(s),  collects  the  requested  information  and/or performs the
       requested operation(s) and returns the information to the sender.


       -a      Log the source addresses of incoming requests.

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

       -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 ones optionally
               specified by the -c option.  Note that this behaviour also cov-
               ers  the  persistent  configuration  files.  This may result in
               dynamically-assigned values  being  reset  following  an  agent
               restart,  unless  the  relevant  persistent  config  files  are
               explicitly loaded using the -c option.

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

               Turn on debugging output for the given TOKEN(s).   Without  any
               tokens specified, it defaults to printing all the tokens (which
               is equivalent to the keyword "ALL").  You might want to try ALL
               for  extremely  verbose  output.  Note: You can not put a space
               between the -D flag and the listed TOKENs.

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

       -g GID  Change to the numerical group ID GID  after  opening  listening

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

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

       -I [-]INITLIST
               This option specifies which modules you do (or do not) want  to
               be  initialized  when  the agent starts up.  If the comma-sepa-
               rated INITLIST is preceded with a ’-’, it is the list  of  mod-
               ules  that  you do not want to be started.  Otherwise, INITLIST
               is the list of modules to be started.

               To get a list of compiled modules, run the agent with the argu-
               ments  -Dmib_init  -H  (assumes you have debugging support com-
               piled in).

       -l [FILE]
               Log all output from the agent (including stdout and stderr)  to
               FILE.   If  no  filename is given, log to a default file set at
               compile time (normally /var/log/snmpd.log).
               This option is being deprecated, and ’-Lf FILE’ should be  used

               Specify where logging output should be directed (standard error
               or output, to a file or via syslog).  See  LOGGING  OPTIONS  in
               snmpcmd(5) for details.
               This option deprecates the -l -s and -S options.

       -p FILE Save the process ID of the daemon in FILE.
               This option deprecates the -P option.

       -P FILE Save  the  process  ID  of  the daemon in FILE.  This option is
               being deprecated, and ’-p FILE’ should be used instead.

       -q      Print simpler output for easier automated parsing.

       -r      Do not require root access to run the daemon.  Specifically, do
               not  exit  if  files only accessible to root (such as /dev/kmem
               etc.) cannot be opened.

       -s      Use syslog for logging.
               This option is being deprecated, and ’-Ls FACILITY’  should  be
               used instead.

       -S d|0-7
               Specifies the syslog facility to use when logging to syslog.
               This  option  is being deprecated, and ’-Ls FACILITY’ should be
               used instead.

       -u UID  Change to the user ID UID (which can be given in  numerical  or
               textual form) after opening listening sockets.

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

       -V      Symbolically dump SNMP transactions.

       -x ADDRESS
               Listens  for AgentX connections on the specified address rather
               than the default ’/var/agentx/master’.  The address can  either
               be  a  Unix  domain  socket  path,  or the address of a network
               interface.  The format is the same as the format  of  listening
               addresses described below.

       -X      Run  as an AgentX subagent rather than as an SNMP master agent.


       By default, snmpd listens for incoming SNMP requests only on  UDP  port
       161.   However,  it  is possible to modify this behaviour by specifying
       one or more listening addresses as arguments  to  snmpd.   A  listening
       address takes the form:


       At its simplest, a listening address may consist only of a port number,
       in which case snmpd listens on that UDP port on  all  IPv4  interfaces.
       Otherwise,  the <transport-address> part of the specification is parsed
       according to the following table:

           <transport-specifier>       <transport-address> format

           udp                         hostname[:port] or IPv4-address[:port]

           tcp                         hostname[:port] or IPv4-address[:port]

           unix                        pathname

           ipx                         [network]:node[/port]

           aal5pvc or pvc              [interface.][VPI.]VCI

           udp6 or udpv6 or udpipv6    hostname[:port] or IPv6-address[:port]

           tcp6 or tcpv6 or tcpipv6    hostname[:port] or IPv6-address[:port]

       Note that <transport-specifier> strings are case-insensitive  so  that,
       for  example,  "tcp" and "TCP" are equivalent.  Here are some examples,
       along with their interpretation:           listen on UDP port 161, but only on  the  loop-
                               back  interface.   This  prevents  snmpd  being
                               queried remotely (which is  a  bit  pointless).
                               The  ":161" is redundant here since that is the
                               default SNMP port in any case.

       TCP:1161                listen on TCP port 1161 on all IPv4 interfaces.

       ipx:/40000              listen on IPX port 40000 on all IPX interfaces.

       unix:/tmp/local-agent   listen on the Unix  domain  socket  /tmp/local-

       /tmp/local-agent        identical  to the previous specification, since
                               the Unix domain is the  default  transport  iff
                               the  first character of the <transport-address>
                               is a ’/’.

       PVC:161                 listen on the AAL5  permanent  virtual  circuit
                               with  VPI=0  and VCI=161 (decimal) on the first
                               ATM adapter in the machine.

       udp6:10161              listen on port 10161 on all IPv6 interfaces.

       Note that not all the transport domains listed  above  will  always  be
       available; for instance, hosts with no IPv6 support will not be able to
       use udp6 transport addresses, and attempts to do so will result in  the
       error  "Error  opening  specified  endpoint".  Likewise, since AAL5 PVC
       support is only currently available on Linux, it  will  fail  with  the
       same error on other platforms.


       snmpd checks for the existence of and parses the following files:

             Common   configuration   for  the  agent  and  applications.  See
             snmp.conf(5) for details.


             Agent-specific configuration.   See  snmpd.conf(5)  for  details.
             These files are optional and may be used to configure access con-
             trol, trap generation, subagent protocols and much else  besides.

             In  addition  to  these two configuration files in /etc/snmp, the
             agent  will  read  any  files  with  the  names  snmpd.conf   and
             snmpd.local.conf in a colon separated path specified in the SNMP-
             CONFPATH environment variable.

             The agent will also load all files in this directory as MIBs.  It
             will  not,  however,  load  any  file  that  begins with a ’.’ or
             descend into subdirectories.


       (in recommended reading order)

       snmp.conf(5), snmpd.conf(5)

4th Berkeley Distribution         7 Feb 2002                          SNMPD(8)

Man(1) output converted with man2html