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KFSensor
What KFSensor is
KFSensor is a self-hosted Windows honeypot system that detects intrusion attempts by imitating vulnerable services and trojans. Professional monitors every TCP and UDP port and detects ICMP or ping messages. Its simulated services include HTTP and HTTPS, SMTP, SMB/CIFS, SOCKS, SQL Server, MySQL, FTP, POP3, Telnet, Terminal Server, and VNC. Users can write simulations in languages such as Perl and C, and the product is compatible with Honeyd scripts. Events can be sent in real time to SIEM systems, including the listed ArcSight and Qradar integrations, or to UNIX Syslog, Windows Event Log, and external applications. Events can also be stored in an ODBC SQL database. Reports and graphs can be filtered by time period, attack type, and visitor location, with configurable alerts including email. Enterprise adds central management for multiple sensors, remote reconfiguration, and centralized signature updates. Professional costs $599, paid once, and a free trial is available.
Who it suits
KFSensor suits security teams looking to observe intrusion attempts against simulated services on Windows. Enterprise may suit organizations managing multiple honeypot sensors centrally.
What it does well
- Professional monitors every TCP and UDP port.
- Supports a broad set of emulated services.
- Sends events to SIEM and other destinations.
- Reports can be filtered by attack type and visitor location.
- Free trial is available.
What to know first
- No free plan is listed.
- Professional edition costs $599, paid once.
- Some features are disabled without WinPcap.
- Windows is the listed platform.
Limits
Professional Edition at $599, paid once covers a single standalone honeypot installation. Without WinPcap installed, several features are disabled. The $120 a year Professional subscription requires a previously purchased Professional license and extends support and maintenance for one year.
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| KFSensor Professional One Year Subscription | $120 USD for one year · requires a previously purchased Professional license; one subscription per license | $120 a year |
| KFSensor Professional Edition | Price per license: US $599 · single stand alone honeypot installation | $599, paid once |
| KFSensor Enterprise Edition | Get a quote online now · multiple honeypot installations; requires Enterprise Administrator and Sensor licenses | On request |
| KFSensor Enterprise One Year Subscription | Please ask for a quote · one year of extended support and maintenance | On request |
As kfsensor.net lists them, read 7 Oct 2026. The maker's own page has the final word.
Getting started
- Visit the KFSensor website and download the Professional free trial or choose an edition.
- Install on a supported Windows system; the trial download lists Windows 10, 11, and Windows Server 2016, 2019, and 2022.
- For a paid Professional installation, purchase the $599 as a one-time license.
- Install WinPcap to avoid disabling several features; the download page also offers Npcap.
- Configure service emulation and event destinations, including SIEM or other supported alert destinations.
- For Enterprise, obtain a quote and use the required Enterprise Administrator and Sensor licenses.
Verdict
KFSensor combines service emulation, event routing, reporting, and configurable alerts in a Windows honeypot. Check the WinPcap dependency and license requirements against your deployment before choosing an edition.
Questions
How much does KFSensor Professional cost?
KFSensor Professional Edition is listed at $599, paid once for a single standalone honeypot installation.
Is there a free trial?
Yes. A Professional free trial is available.
Which platforms are supported?
KFSensor is for Windows. The Professional trial download lists Windows 10, 11, and Windows Server 2016, 2019, and 2022.
Does KFSensor integrate with SIEM systems?
It sends events to SIEM systems in real time and lists ArcSight and Qradar as supported integrations.
What does the Professional subscription cost?
It costs $120 a year, requires a previously purchased Professional license, and provides one year of extended support and maintenance.
What does Enterprise add?
Enterprise combines events from multiple sensors in a central console and supports remote reconfiguration and centralized signature updates. Its price is available by quote.
Facts from KFSensor's own pages
- Attack response
- It emulates real services to reveal attack behavior while maintaining control and avoiding the risk of compromise. · kfsensor.net, 7 Oct 2026
- Custom emulation
- Users can write simulations in languages including Perl and C, and KFSensor is compatible with Honeyd scripts. · kfsensor.net, 7 Oct 2026
- Encrypted remote management
- Enterprise secures sensor communications with 3072-bit RSA authentication and 256-bit AES encryption, according to the features page. · kfsensor.net, 7 Oct 2026
- Enterprise management
- Enterprise combines events from multiple sensors in a central console and supports remote reconfiguration and centralized signature updates. · kfsensor.net, 7 Oct 2026
- Maker
- KeyFocus Ltd. says it was founded in 1994 and is based in the UK. · kfsensor.net, 7 Oct 2026
- Other integrations
- KFSensor can send alerts to UNIX Syslog, the local Windows Event Log, or an external application, and can optionally store events in an ODBC SQL database. · kfsensor.net, 7 Oct 2026
- Packet capture dependency
- KFSensor works without WinPcap installed, but several features will be disabled; the download page also offers Npcap. · kfsensor.net, 7 Oct 2026
- Purpose
- KFSensor is a Windows honeypot system that detects intrusions by simulating vulnerable system services and trojans. · kfsensor.net, 7 Oct 2026
- Reports and alerts
- The product provides reports and graphs filterable by time period, attack type, and visitor location, plus configurable alerts including email. · kfsensor.net, 7 Oct 2026
- Security
- The maker says KFSensor follows least privilege and does not require Admin or root privileges to function. · kfsensor.net, 7 Oct 2026
- Service emulation
- Emulated services include HTTP and HTTPS, SMTP, SMB/CIFS, SOCKS, SQL Server, MySQL, FTP, POP3, Telnet, Terminal Server, and VNC. · kfsensor.net, 7 Oct 2026
- SIEM integration
- KFSensor sends events to SIEM systems in real time and lists ArcSight and Qradar as supported integrations. · kfsensor.net, 7 Oct 2026
- Support
- License purchases include email support and upgrades for one year, after which an optional subscription extends support and maintenance for another year. · kfsensor.net, 7 Oct 2026
- Traffic monitoring
- Professional monitors every TCP and UDP port and detects ICMP or ping messages. · kfsensor.net, 7 Oct 2026
- Trial and supported Windows
- The Professional free trial download page lists Windows 10, 11, and Windows Server 2016, 2019, and 2022. · kfsensor.net, 7 Oct 2026
Where KFSensor stands on Freedom251
- Honeypot Software#16 of 21