Learn about our performance monitors.

To view and change the performance and reputation monitors, select Reputation Monitors.


To turn each monitor on or off, under Enabled, select the switch. Typically, all monitors are turned on. However, you might want to turn a monitor off when you have a website update or when you’re resolving a related issue.


Performance Monitor Control

This page monitors status and control. To run a monitor and get a test result immediately, select Run Test. To view the current status of each monitor and the time that has passed since the last issue a specific monitor encountered, view the Status and Streak columns. For more information about each monitor, select the magnifying glass.


To control the contacts for each monitor, select Edit.

The Monitor Preferences page appears. By default, a contact is established when you install NS8. You can set this to a specific contact in your company to make sure performance notifications do not get missed. To add more contacts, use the Contacts menu

Testing and editing monitors

To run each test and get immediate results, select Run Test. To change the settings and contact information for each monitor, select Edit.

The five performance monitors

Certificate Validity

This monitor checks the validity of certificates and tells you the following information before your certificates expire:

  • If the certificate is accessible
  • If the certificate and domain are the same
  • If the certificate is expired and valid
  • If the certificate has a revoked root CA
  • If the certificate supports a cipher that has been deprecated

Domain Blocklist

This monitor uses the most reputable blocklists to see if your domain is listed. We check blocklists if the listing services receive a certain amount of complaints. Website domains are blocked if they appear on emails that are considered spam.

However, you do not have to be involved in spam to appear on a blocklist. Domains are listed based on algorithms that can trap non-spammers unknowingly. If you are on a blocklist, most of your emails will no longer be delivered.

Global Performance

This monitor observes global load times and satisfaction levels from real users. It also finds issues based on real user experiences. The Global Performance monitor optimizes your site's performance based on dozens of attributes, including location and device. This is enabled by putting a JavaScript snippet on your pages.

We monitor the following metrics for issues:

  • DNS Time: The average amount of time DNS resolution takes.
  • Response Time: The average amount of time the web server takes to start the response to the user.
  • Interactive Time: The average amount of time in milliseconds before the page becomes interactive.

There's sophisticated reporting available about performance issues that can be segmented by:

  • Geolocation
  • Browser
  • Platform
  • Device
  • Time of day
  • Other attributes

To determine if you need extra capacity, compare traffic levels to performance issues.

Google Safe Browsing

This monitor checks to see if Google Safe Browsing has flagged your site for hosting malware or being a phishing site.

Google provides this service to warn users that the site is unsafe. Security systems also use Google Safe Browsing to keep users from browsing listed sites.

If you're listed, your site has been compromised or infected with malware.

Website Content Match

This monitor uses our global network of monitoring stations to make sure that your website is available and responsive from around the world. The website monitor continuously checks your site for the following issues:

  • If the site is up or down
  • If the site loads within a time that you set
  • If DNS is responding

Match phrase testing looks for keywords or phrases that you enter every time your page is tested. This will help make sure that the page's content has not been hijacked or edited. For example, if your site sells coffee mugs, you might want the monitor to search for mugs.