Rules: Inbound Port Scan
This rule detects port scanning activity from external actors against public facing assets.
| Detail | Value |
|---|---|
| Type | Threshold |
| Category | Discovery |
| Apply Risk to Entities | dstDevice_ip, dstDevice_hostname |
| Signal Name | Inbound Port Scan |
| Summary Expression | External port scan from IP: {{srcDevice_ip}} detected |
| Threshold Count | 20 |
| Threshold Window | 5m |
| Score/Severity | Static: 0 |
| Enabled by Default | False |
| Prototype | False |
| Tags | _mitreAttackTactic:TA0043, _mitreAttackTechnique:T1595, _mitreAttackTechnique:T1595.001, _mitreAttackTechnique:T1595.002 |
- Amazon AWS - Network Firewall
- Amazon AWS - VpcFlowLogs
- Bro - Bro
- CheckPoint - Firewall and VPN
- CheckPoint - SmartDefense
- CheckPoint - URL Filtering
- Cisco Systems - ASA
- Cisco Systems - Firepower
- Cisco Systems - Meraki
- Dell - Firewall
- Fortinet - Fortigate
- Netskope - Security Cloud
- OISF - Suricata IDS
- Palo Alto Networks - Next Generation Firewall
- Sophos - UTM 9
- Zscaler - Nanolog Streaming Service
| Origin | Field |
|---|---|
| Normalized Schema | dstDevice_hostname |
| Normalized Schema | dstDevice_ip |
| Normalized Schema | dstPort |
| Normalized Schema | objectType |
| Normalized Schema | srcDevice_ip_isInternal |