If you’re trying to monitor services on ports that are blocked in your server’s firewall or ports that run services requiring authentication, chances are that our monitor locations’ IPs will end up being blocked by your firewall. If this happens, then our system won’t be able to properly monitor your services, since they would appear to be always down.

You can avoid this by doing the following:

  • monitor only ports that run services which do not require authentication (i.e.: 80,443,etc.)
  • do not try to monitor ports that you’re blocking in your firewall (i.e.: 3306)
  • whitelist our monitor locations IPs in your firewall (see below)

List of our monitor locations’ IPs:

We also keep this text list of our Uptime Monitoring IPs always updated: