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.TH SNMPD 8 "7 Feb 2002" VVERSIONINFO "Net-SNMP"
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snmpd - daemon to respond to SNMP request packets.
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[OPTIONS] [LISTENING ADDRESSES]
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is an SNMP agent which binds to a port and awaits requests from
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SNMP management software. Upon receiving a request, it processes the
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request(s), collects the requested information and/or performs the
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requested operation(s) and returns the information to the sender.
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Log the source addresses of incoming requests.
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Append to the log file rather than truncating it.
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as a configuration file
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(or a comma-separated list of configuration files).
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Do not read any configuration files except the ones optionally specified by the
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Note that this behaviour also covers the persistent configuration files.
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This may result in dynamically-assigned values being reset following an
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agent restart, unless the relevant persistent config files are
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explicitly loaded using the
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Dump (in hexadecimal) the sent and received SNMP packets.
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Turn on debugging output for the given
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Without any tokens specified, it defaults to printing all the tokens
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(which is equivalent to the keyword "ALL").
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for extremely verbose output. Note: You can not put a space between
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the -D flag and the listed TOKENs.
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Do not fork() from the calling shell.
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Change to the numerical group ID
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after opening listening sockets.
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Display a brief usage message and then exit.
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Display a list of configuration file directives understood by the
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This option specifies which modules you do (or do not) want to be
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initialized when the agent starts up. If the comma-separated
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with a '-', it is the list of modules that you do
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want to be started. Otherwise,
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is the list of modules to be started.
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To get a list of compiled modules, run the agent with the arguments
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(assumes you have debugging support compiled in).
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.BR -l "" " " "[\fIFILE" "" "]"
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Log all output from the agent (including stdout and stderr) to
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If no filename is given, log to a default file set at compile time
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(normally /var/log/snmpd.log).
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This option is being deprecated, and '-Lf FILE' should be used instead.
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Specify where logging output should be directed (standard error or output,
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to a file or via syslog). See LOGGING OPTIONS in snmpcmd(5) for details.
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This option deprecates the
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Save the process ID of the daemon in
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This option deprecates the
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Save the process ID of the daemon in
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This option is being deprecated, and '-p FILE' should be used instead.
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Print simpler output for easier automated parsing.
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Do not require root access to run the daemon. Specifically, do not exit
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if files only accessible to root (such as /dev/kmem etc.) cannot be
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Use syslog for logging.
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This option is being deprecated, and '-Ls FACILITY' should be used instead.
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Specifies the syslog facility to use when logging to syslog.
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This option is being deprecated, and '-Ls FACILITY' should be used instead.
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Change to the user ID
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(which can be given in numerical or textual form) after opening
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Print version information for the agent and then exit.
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Symbolically dump SNMP transactions.
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Listens for AgentX connections on the specified address
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rather than the default '/var/agentx/master'.
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The address can either be a Unix domain socket path,
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or the address of a network interface. The format is the same as the
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format of listening addresses described below.
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Run as an AgentX subagent rather than as an SNMP master agent.
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.SH LISTENING ADDRESSES
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listens for incoming SNMP requests only on UDP port 161. However, it
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is possible to modify this behaviour by specifying one or more
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listening addresses as arguments to
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A listening address takes the form:
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[<transport-specifier>:]<transport-address>
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At its simplest, a listening address may consist only of a port
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number, in which case
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listens on that UDP port on all IPv4 interfaces. Otherwise, the
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<transport-address> part of the specification is parsed according to
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.BR "<transport-specifier>"
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.BR "<transport-address> format"
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[network]:node[/port]
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.IR "" "aal5pvc " or " pvc"
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[interface.][VPI.]VCI
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.IR "" "udp6 " or " udpv6 " or " udpipv6"
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.IR "" "tcp6 " or " tcpv6 " or " tcpipv6"
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Note that <transport-specifier> strings are case-insensitive so that,
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for example, "tcp" and "TCP" are equivalent. Here are some examples,
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along with their interpretation:
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listen on UDP port 161, but only on the loopback interface. This
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being queried remotely (which is a bit pointless). The ":161" is
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redundant here since that is the default SNMP port in any case.
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listen on TCP port 1161 on all IPv4 interfaces.
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listen on IPX port 40000 on all IPX interfaces.
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.IR "unix:/tmp/local-agent"
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listen on the Unix domain socket
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.IR /tmp/local-agent .
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.IR "/tmp/local-agent"
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identical to the previous specification, since the Unix domain is the
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default transport iff the first character of the <transport-address>
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listen on the AAL5 permanent virtual circuit with VPI=0 and VCI=161
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(decimal) on the first ATM adapter in the machine.
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listen on port 10161 on all IPv6 interfaces.
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Note that not all the transport domains listed above will always be
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available; for instance, hosts with no IPv6 support will not be able
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to use udp6 transport addresses, and attempts to do so will result in
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the error "Error opening specified endpoint". Likewise, since AAL5
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PVC support is only currently available on Linux, it will fail with
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the same error on other platforms.
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.SH CONFIGURATION FILES
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checks for the existence of and parses the following files:
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.B SYSCONFDIR/snmp/snmp.conf
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Common configuration for the agent and applications. See
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.B SYSCONFDIR/snmp/snmpd.conf
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.B SYSCONFDIR/snmp/snmpd.local.conf
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Agent-specific configuration. See
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for details. These files are optional and may be used to configure
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access control, trap generation, subagent protocols and much else
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In addition to these two configuration files in SYSCONFDIR/snmp, the
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agent will read any files with the names
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in a colon separated path specified in the
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SNMPCONFPATH environment variable.
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.B DATADIR/snmp/mibs/
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The agent will also load all files in this directory as MIBs. It will
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not, however, load any file that begins with a '.' or descend into
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(in recommended reading order)
added
removed
man/snmpd.8.def
