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       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).   Note  that  the  loaded file will only
               understand snmpd.conf tokens, unless the configuration type  is
               specified  in the file as described in the snmp_config man page

       -C      Do not read any configuration files except the ones  optionally
               specified  by  the  -c  option.   Note that this behaviour also
               covers 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
               Specifies  which  modules should (or should not) be initialized
               when the agent 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 the agent with the
               arguments -Dmib_init -H (assuming debugging  support  has  been
               compiled in).

               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.

       -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 NAME Set  an  alternative  application  name  (which will affect the
               configuration files loaded).  By default this  will  be  snmpd,
               regardless of the name of the actual binary.

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

       -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.

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

       -U      Instructs the agent to not remove its  pid  file  (see  the  -p
               option)  on  shutdown. Overrides the leave_pidfile token in the
               snmpd.conf file, see snmpd.conf(5).

       -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.

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


       By default, snmpd listens for incoming SNMP requests on UDP port 161 on
       all  IPv4 interfaces.  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 (default)               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
                               loopback  interface.  This prevents snmpd being
                               queried  remotely.   The   port   specification
                               ":161"  is not strictly necessary since that is
                               the default SNMP port.

       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        is  identical  to  the  previous specification,
                               since the Unix domain is assumed if  the  first
                               character of the <transport-address> is '/'.

       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
             control,  trap  generation,  subagent  protocols  and  much  else

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