SMTP Server Non-standard Port Detection

Medium Nessus Plugin ID 18391


The remote SMTP service is running on a non-standard port.


This SMTP server is running on a non-standard port. This might be a backdoor set up by attackers to send spam or even control of a targeted machine.


Check and clean the configuration.

See Also

Plugin Details

Severity: Medium

ID: 18391

File Name: smtp_backdoor.nasl

Version: Revision: 1.16

Type: remote

Family: Backdoors

Published: 2005/05/29

Updated: 2017/12/01

Dependencies: 10263

Risk Information

Risk Factor: Medium

CVSS v2.0

Base Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N