NAT-MIB :: natTcpDefIdleTimeout

MIB Reference — IPNetwork Monitor · Updated September 14, 2026

All MIBsNAT-MIBnatTcpDefIdleTimeout

natTcpDefIdleTimeout

Module: NAT-MIB

OID (symbolic): NAT-MIB::natTcpDefIdleTimeout

OID (numeric): 1.3.6.1.2.1.123.1.1.5

Node type: OBJECT-TYPE

Type: Unsigned32

Access: read-write

Description: The default time interval that a NAT session for an established TCP connection is allowed to remain valid without any activity on the TCP connection.

If the agent is capable of storing non-volatile configuration, then the value of this object must be restored after a reinitialization of the management system.

Deprecated in favor of NATV2-MIB.

What is natTcpDefIdleTimeout?

Default idle timeout, in seconds, for an already-established TCP connection passing through NAT, defaulting to 86400 seconds (24 hours). This is why long-lived idle TCP sessions (e.g. an SSH session left open overnight) can survive through a NAT device without being retranslated; deprecated in favor of NATV2-MIB.

Examples

Walk all instances (SNMPv2c):

snmpwalk -v2c -c public <target> 1.3.6.1.2.1.123.1.1.5
snmpwalk -v2c -c public <target> NAT-MIB::natTcpDefIdleTimeout

Get a specific instance (index 1):

snmpget -v2c -c public <target> 1.3.6.1.2.1.123.1.1.5.1
snmpget -v2c -c public <target> NAT-MIB::natTcpDefIdleTimeout.1

Set instance 1 (SNMPv2c):

snmpset -v2c -c private <target> 1.3.6.1.2.1.123.1.1.5.1 i <value>

Start monitoring Vendor-neutral IETF standard (NAT-capable router, firewall, or CGN appliance) with a free 30-day trial of IPNetwork Monitor. Create custom SNMP monitor using the NAT-MIB::natTcpDefIdleTimeout OID value, configure state conditions and alerts, and monitor any Vendor-neutral IETF standard (NAT-capable router, firewall, or CGN appliance) from a single console.

OID Breakdown

Upper-level ancestors (6 from the standard OID tree / other modules)
Numeric OIDNameModule
1isoLANART-AGENT
1.3orgAirPair-MIB
1.3.6dodAirPair-MIB
1.3.6.1internetAirPair-MIB
1.3.6.1.2mgmtAXON-MIB
1.3.6.1.2.1mib_2AXON-MIB
Numeric OIDNameModule
1.3.6.1.2.1.123natMIBNAT-MIB
1.3.6.1.2.1.123.1natMIBObjectsNAT-MIB
1.3.6.1.2.1.123.1.1natDefTimeoutsNAT-MIB
1.3.6.1.2.1.123.1.1.5natTcpDefIdleTimeoutNAT-MIB