All MIBs › ALTEON-CHEETAH-SWITCH-MIB › agDosPortStatsNullScanAttack
agDosPortStatsNullScanAttack
Module: ALTEON-CHEETAH-SWITCH-MIB
OID (symbolic): ALTEON-CHEETAH-SWITCH-MIB::agDosPortStatsNullScanAttack
OID (numeric): 1.3.6.1.4.1.1872.2.5.1.2.6.1.1.31
Node type: OBJECT-TYPE
Type: Counter32
Access: read-only
Description: TCP packets were the TCP sequence number is zero and all control bits are zeroes.
What is agDosPortStatsNullScanAttack?
This Counter32 detects TCP packets with sequence number zero and all control bits cleared—a signature of null-scan reconnaissance. Network engineers use this to identify port scanning activity. Example: clusters of these packets indicate active network reconnaissance within a specific time window.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.4.1.1872.2.5.1.2.6.1.1.31 snmpwalk -v2c -c public <target> ALTEON-CHEETAH-SWITCH-MIB::agDosPortStatsNullScanAttack
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.4.1.1872.2.5.1.2.6.1.1.31.1 snmpget -v2c -c public <target> ALTEON-CHEETAH-SWITCH-MIB::agDosPortStatsNullScanAttack.1
Start monitoring Alteon (Nortel/Radware) Cheetah-based application switches (legacy) with a free 30-day trial of IPNetwork Monitor. Create custom SNMP monitor using the ALTEON-CHEETAH-SWITCH-MIB::agDosPortStatsNullScanAttack OID value, configure state conditions and alerts, and monitor any Alteon (Nortel/Radware) Cheetah-based application switches (legacy) from a single console.
OID Breakdown
Upper-level ancestors (9 from the standard OID tree / other modules)
| Numeric OID | Name | Module |
|---|---|---|
| 1 | iso | LANART-AGENT |
| 1.3 | org | AirPair-MIB |
| 1.3.6 | dod | AirPair-MIB |
| 1.3.6.1 | internet | AirPair-MIB |
| 1.3.6.1.4 | private | AirPair-MIB |
| 1.3.6.1.4.1 | enterprises | AirPair-MIB |
| 1.3.6.1.4.1.1872 | alteon | ALTEON-PRIVATE-MIBS |
| 1.3.6.1.4.1.1872.2 | private_mibs | ALTEON-PRIVATE-MIBS |
| 1.3.6.1.4.1.1872.2.5 | aws_switch | ALTEON-ROOT-MIB |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.4.1.1872.2.5.1 | agent | ALTEON-CHEETAH-SWITCH-MIB |
| 1.3.6.1.4.1.1872.2.5.1.2 | agentStats | ALTEON-CHEETAH-SWITCH-MIB |
| 1.3.6.1.4.1.1872.2.5.1.2.6 | securityStats | ALTEON-CHEETAH-SWITCH-MIB |
| 1.3.6.1.4.1.1872.2.5.1.2.6.1 | agDosPortStatsTable | ALTEON-CHEETAH-SWITCH-MIB |
| 1.3.6.1.4.1.1872.2.5.1.2.6.1.1 | agDosPortStatsTableEntry | ALTEON-CHEETAH-SWITCH-MIB |
| 1.3.6.1.4.1.1872.2.5.1.2.6.1.1.31 | agDosPortStatsNullScanAttack | ALTEON-CHEETAH-SWITCH-MIB |