snmpnetstat

Fetch the networking status

$ snmpnetstat -v [version] -c [community] [ip]

$ snmpnetstat [[-h|--help]]

snmpnetstat [OPTIONS] HOST

-v 1|2c|3
    Specifies the SNMP version to use: 1, 2c, or 3. The default is version 1.

-c COMMUNITY
    Sets the SNMP community string for version 1 or 2c. The default is 'public'.

-C
    Display TCP connection table without resolving hostnames or ports.

-d
    Displays TCP connections table with debugging information.

-e
    Displays extended TCP connection table information.

-h
    Displays help information.

-i
    Displays network interface information. Requires interface name as an argument. (ex. snmpnetstat -i eth0 HOST)

-I
    Same as -i, but additionally displays input/output information.

-m
    Displays MIB information

-n
    Displays addresses and port numbers numerically.

-p PROTOCOL
    Specifies the protocol to display (tcp, udp, icmp, ip). The default is to display all protocols.

-s
    Displays per-protocol statistics.

-S
    Displays SNMP statistics.

-t
    Displays TCP connection information.

-u
    Displays UDP connection information.

-V
    Displays the version number of the snmpnetstat command.

-z
    Suppresses the display of interfaces with zero traffic.

HOST
    The hostname or IP address of the device to query via SNMP.

The `snmpnetstat` command uses the Simple Network Management Protocol (SNMP) to retrieve network statistics from a remote device. It displays information similar to the standard `netstat` command, but instead of gathering data directly from the local kernel, it queries an SNMP agent on a specified host. This allows you to monitor network activity on remote systems even if you don't have direct access to their operating system.

`snmpnetstat` supports querying various MIBs (Management Information Bases) to gather data about TCP, UDP, ICMP, and IP protocols, as well as network interfaces. It's especially useful for monitoring network devices like routers, switches, and servers that expose SNMP interfaces. It allows operators to monitor and diagnose network problems in real-time.

The availability and accuracy of the data depend on the configuration and capabilities of the SNMP agent on the remote device. Some devices may not support all MIBs, or may provide incomplete or inaccurate data. Authentication and access control must be configured correctly on the SNMP agent to allow `snmpnetstat` to retrieve data.

When using SNMPv3, additional options are required to configure authentication and encryption. These options include `-u SECNAME`, `-l LEVEL`, `-a AUTHPROTOCOL`, `-A AUTHPASSWORD`, `-x PRIVPROTOCOL`, and `-X PRIVPASSWORD`. Consult the `snmpcmd(1)` manual page for details on these options.

The output format of `snmpnetstat` is similar to that of `netstat`, but may differ depending on the device and the MIBs it supports. Refer to the device's documentation and SNMP MIB definitions for a complete understanding of the output fields.

netstat(1), snmpwalk(1), snmpget(1), tcpdump(1)