Open Port Re-check

info Nessus Plugin ID 10919
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.


Previously open ports are now closed.


One of several ports that were previously open are now closed or unresponsive.

There are several possible reasons for this :

- The scan may have caused a service to freeze or stop running.

- An administrator may have stopped a particular service during the scanning process.

This might be an availability problem related to the following :

- A network outage has been experienced during the scan, and the remote network cannot be reached anymore by the scanner.

- This scanner may has been blacklisted by the system administrator or by an automatic intrusion detection / prevention system that detected the scan.

- The remote host is now down, either because a user turned it off during the scan or because a select denial of service was effective.

In any case, the audit of the remote host might be incomplete and may need to be done again.


- Increase checks_read_timeout and/or reduce max_checks.

- Disable any IPS during the Nessus scan

Plugin Details

Severity: Info

ID: 10919

File Name: check_ports.nasl

Version: 1.45

Type: remote

Family: General

Published: 3/19/2002

Updated: 7/23/2021

Dependencies: find_service1.nasl

Vulnerability Information

Excluded KB Items: Host/dead

Reference Information

IAVB: 0001-B-0509