Should port 8834 be open on my firewall?

Port 8834 should only be open with strict firewall rules whitelisting trusted IP addresses. Enable rate limiting and intrusion detection systems.

What transport protocol does port 8834 use?

Port 8834 (Nessus) uses the TCP transport protocol and falls under the Security & VPN category.

:8834 (TCP)

Nessus

Q: Is port 8834 (Nessus) dangerous?

Port 8834 is classified as high risk. It is a common target for automated scanning and brute-force attacks. Restrict access to trusted IPs if exposure is necessary.

High Risk

TCP — Security & VPN

Port Overview

Port Number 8834

Service Name Nessus

Transport Protocol TCP

Category Security & VPN

Security Risk High

Port Range Registered (1024-49151)

What is Port 8834?

Port 8834 is the default HTTPS port for the Nessus vulnerability scanner web interface and REST API. Security professionals use Nessus to perform network vulnerability assessments and compliance audits. Access to the Nessus interface should be restricted to authorized security personnel only.

TCP Security & VPN Commonly Used

Security Considerations

Port 8834 (Nessus) is classified as high risk. This port is a common target for automated scanning and brute-force attacks. If you must expose it, restrict access to known IP addresses.

Recommendation: Use firewall rules to whitelist trusted IPs. Enable rate limiting and intrusion detection.

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