Port 3999Norman Scanning Service
Norman Distributed Scanning Service is used by Norman security products for distributed malware scanning and coordination across networked endpoints. It facilitates efficient scanning by offloading tasks, distributing updates, and managing scan schedules in enterprise environments..
- transport
- tcp · udp
- in transit
- cleartext
- assignment
- official
- risk
- 4/10
- lookups
- 9,939
2 transports registered
payload readable on path
registered with iana
caution
rank 476 of 993 · top 48%
Technical Details
what runs on :3999Norman Distributed Scanning Service primarily supports Norman security software designed to offer antivirus and malware scanning capabilities in enterprise networks. This service coordinates scanning tasks across distributed endpoints to optimize resource usage and minimize scan times by parallelizing and scheduling malware detection tasks.
The service operates over both TCP and UDP, providing flexible communication suited for both reliable data transmission and lightweight, fast messaging between scanning clients and management servers. It assists in distributing signature updates, scan results, and task management commands to client devices, ensuring synchronized protection.
Norman solutions integrate deeply into corporate environments, with the distributed scanning service enabling scalable security management. It centralizes scan coordination and update distribution, reducing overhead and enabling consistent application of security policies while providing detailed reporting to administrators.
Security Information
exposure of :3999risk score
4/ 10caution
worth attention. how exposed you are depends on configuration — don't leave it reachable from the internet without a reason.
security averages 3.8 across 216 ports — this one sits 0.2 above.
in transit
cleartext
credentials and payloads are readable by anyone on path
assignment
official
registered with iana for this service — scanners fingerprint it by number
reachable over
tcp · udp
udp is connectionless — source addresses are trivially spoofed and it is a reflection favourite
security overview
Common Vulnerabilities:
- Exposure of the service may allow attackers to gain information about the internal security infrastructure.
- If improperly configured or left unprotected, the service could be exploited for unauthorized task manipulation or denial of service.
- The lack of encryption may expose sensitive data in transit to interception or tampering.
Common Mitigations:
- Restrict network access to trusted hosts and secure network segments only.
- Use firewall rules to limit external exposure.
- Enable strong authentication mechanisms where supported.
- Regularly update Norman software to patch known vulnerabilities.
- Monitor logs for unauthorized or suspicious scanning activity.
- Where possible, use encrypted tunneling to protect data in transit.
Related Ports
the 8 most looked-up other ports in security — 216 ports carry that label.
| port | service | risk | |||
|---|---|---|---|---|---|
| :8881 | Atlasz Secure Server | TCP | Web Services | caution | 67.6k |
| :443 | HTTPS | TCPtls | Web Services | caution | 65.9k |
| :8291 | Winbox MikroTik Admin | TCP | Security | caution | 62.9k |
| :3268 | Microsoft Global Catalog (GC) | TCPUDP | Security | caution | 54.6k |
| :135 | Microsoft EPMAP | TCPUDP | Security | caution | 51.9k |
| :3128 | Squid Proxy HTTP | TCP | Web Services | caution | 45.8k |
| :8080 | HTTP Alternate | TCPtls | Web Services | caution | 44.9k |
| :7000 | Vuze HTTPS Tracker | TCPtls | Security | caution | 28.9k |
risk mix of the 8 listed
- caution100%
3 of 8 encrypted