What is this?

This knowledgebase contains questions and answers about PRTG Network Monitor and network monitoring in general.

Learn more

PRTG Network Monitor

Intuitive to Use. Easy to manage.
More than 500,000 users rely on Paessler PRTG every day. Find out how you can reduce cost, increase QoS and ease planning, as well.

Free Download

Top Tags

View all Tags

DNS sensor too high ms



Why the DNS sensor give me 317 ms when the ping sensor give me (min time 1ms) also the same with the smtp sensor arround 317 ms , is it not too high?

dns ping smtp

Created on Jan 10, 2011 5:08:28 PM

Last change on Jan 11, 2011 8:59:02 AM by  Daniel Zobel [Product Manager]

1 Reply

Accepted Answer



To the response time, PRTG (up to version for most sensors adds the time needed for DNS resolution. So, when adding a Ping sensor to a PRTG device whose host is a DNS name, the DNS resolution is part of the ping time. This behavior will be adjustable soon. Meanwhile, please use the IP address as host instead of a DNS name to get the Ping time without DNS resolution. The same is true for e.g. the SMTP sensor.

Created on Jan 11, 2011 9:05:40 AM by  Daniel Zobel [Product Manager]

Disclaimer: The information in the Paessler Knowledge Base comes without warranty of any kind. Use at your own risk. Before applying any instructions please exercise proper system administrator housekeeping. You must make sure that a proper backup of all your data is available.