Is port 1241 (Nessus) dangerous?

Port 1241 is classified as medium risk. It is commonly exposed but consider using encrypted alternatives where available and monitor activity.

Should port 1241 be open on my firewall?

Port 1241 can be open but should be monitored closely. Keep the service updated and prefer encrypted alternatives where available.

What transport protocol does port 1241 use?

Port 1241 (Nessus) uses the TCP transport protocol and falls under the Security & VPN category.

:1241 (TCP)

Nessus

Medium Risk

TCP — Security & VPN

Port Overview

Port Number 1241

Service Name Nessus

Transport Protocol TCP

Category Security & VPN

Security Risk Medium

Port Range Registered (1024-49151)

What is Port 1241?

Port 1241 is the default port for the Nessus vulnerability scanner server daemon. Security professionals use Nessus to scan networks and systems for vulnerabilities, misconfigurations, and compliance issues. The Nessus server listens on this port for client connections from the Nessus web interface.

TCP Security & VPN Commonly Used

Security Considerations

Port 1241 (Nessus) is classified as medium risk. While this service is commonly exposed, consider using encrypted alternatives where available.

Recommendation: Keep the service updated. Monitor logs for unusual activity.

Related Ports — Security & VPN

31 MSG-AUTH 48 Auditd 49 TACACS 56 XNS-AUTH 62 ACA Services 65 TACACS-DS 88 Kerberos 90 DNSIX Security

Related Terms

SSL/TLS Certificate DDoS DNS Spoofing Encryption Firewall HTTPS