DFL260-MIB

MIB Reference — IPNetwork Monitor · Updated October 05, 2026

All MIBs › DFL260-MIB

Organization: D-Link Corporation

Last Updated: 2010-09-02

Category: VPN and Security, Vendor: D-Link

Description: Manages D-Link DFL-260 firewall/UTM appliance configuration, policies, and VPN settings.

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What Is DFL260-MIB?

DFL260-MIB is a D-Link vendor MIB for the DFL-260 series NetDefend UTM firewall appliance, covering system performance, connection tracking, per-protocol packet-state counters, and per-interface traffic statistics alongside VPN/policy configuration. It exposes clear hardware/software status data including CPU load, buffer usage, forwarded traffic volume, active connection counts, and TCP/UDP/ICMP state-machine packet counters (SYN, open, FIN, UDP, ICMP, other). This makes it directly useful for monitoring appliance health: dfl260SysCpuLoad flags CPU exhaustion, dfl260SysBuffUse flags memory/buffer pressure, and dfl260SysConns combined with the TCP state counters reveals connection-table exhaustion or a SYN-flood-style attack condition. It is a self-contained enterprise MIB under the dlink/netdefendMgmt/utmFirewall subtree with no notable dependency on other standard MIBs beyond the base SNMP framework. It is deployed on D-Link DFL-260 UTM firewalls, where DFL260-MIB SNMP monitoring protects small-to-medium business network edges by exposing CPU, connection, and traffic health.

IPNetwork Monitor allows you to monitor SNMP objects defined in DFL260-MIB. Use the built-in SNMP Monitoring Browser to explore available variables, view their current values and descriptions, and select the objects you want to monitor. You can then create SNMP monitors, configure thresholds, and receive alerts when monitored values change.

Supported Devices

  • D-Link DFL-260 series UTM firewall appliance

Monitoring Examples

An operator would poll dfl260SysCpuLoad and dfl260SysBuffUse on a short interval to catch CPU or buffer saturation, and watch dfl260SysConns alongside dfl260SysPscTcpSyn and dfl260SysPscTcpOpen to see whether half-open TCP sessions are accumulating (a SYN-flood indicator). Walking dfl260IfStatsTable per interface shows which WAN or LAN port is carrying the forwarded bit/packet load reported in dfl260SysForwardedBits and dfl260SysForwardedPackets, helping localize a traffic spike to a specific link.

What Can Be Monitored

  • CPU load
  • buffer utilization
  • active connection count
  • forwarded traffic bits/packets
  • TCP SYN/open/FIN state counters
  • per-interface traffic statistics
Imported Objects

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

Counter32
Counter64
Gauge32
Integer32
MODULE-IDENTITY
OBJECT-TYPE
enterprises

From SNMPv2-TC

DisplayString

How to Use in IPNetwork Monitor

Example using dfl260SysForwardedBits OID:

Select a D-Link DFL-260 series UTM firewall appliance as the target host to create a monitor — the SNMP service should be up and running on it. Click New Monitor, then check SNMP Custom on the Favorites tab, click Next, and confirm the host. On the next page, click Select... to open the built-in SNMP MIB Browser and type dfl260SysForwardedBits into the Find box to locate it in the OID tree, then select it and click OK. The number of bits forwarded through the gateway. On the monitor's Main parameters page you can set the target's SNMP port (default 161), credentials, polling interval, and other settings — see the SNMP Monitor help for details. On the State conditions and Alerting tabs, configure when the monitor should change state and trigger an alert; since this is a Counter32-type OID, Value bounds is the most useful condition here — trigger an alert if the counter increases sharply between polls relative to its normal baseline, since an unexpected spike often reflects a real change in traffic or activity. Click Finish to create the monitor; you can adjust any parameter later.
OIDs

RFC description

Vendor-private MIB for D-Link DFL-260 series UTM firewalls managing system statistics, counters, and performance metrics.

Start monitoring D-Link DFL-260 series UTM firewall appliance with a free 30-day trial of IPNetwork Monitor. Import MIBs, browse SNMP OIDs, create custom SNMP monitors, configure alerts, and monitor any SNMP-enabled network device from a single console.

Download DFL260-MIB