Daytime Service Detection

info Nessus Plugin ID 10052


A daytime service is running on the remote host.


The remote host is running a 'daytime' service. This service is designed to give the local time of the day of this host to whoever connects to this port. The date format issued by this service may sometimes help an attacker to guess the operating system type of this host, or to set up timed authentication attacks against the remote host.

In addition, if the daytime service is running on a UDP port, an attacker may link it to the echo port of a third-party host using spoofing, thus creating a possible denial of service condition between this host and the third party.


- On Unix systems, comment out the 'daytime' line in /etc/inetd.conf and restart the inetd process.

- On Windows systems, set the following registry keys to 0 :
HKLM\System\CurrentControlSet\Services\SimpTCP\Parameters\EnableTcpDaytime HKLM\System\CurrentControlSet\Services\SimpTCP\Parameters\EnableUdpDaytime Next, launch cmd.exe and type :

net stop simptcp net start simptcp This will restart the service.

Plugin Details

Severity: Info

ID: 10052

File Name: daytime.nasl

Version: Revision: 1.43

Type: remote

Published: 6/22/1999

Updated: 5/9/2014