Monitor any specific port on your server.

Monitor any specific port on your server.

Make sure any service on your server is still available with the Port monitoring.

Get 50 monitors totally FREE.

Start monitoring for FREE

Monitor any port on your server.

Make sure databases and other services running on different ports on your server are always available. We support any port, including HTTPS, FTP, SSH, ...

Make sure your email service runs smoothly.

Set up a POP3, IMAP and SMTP port monitoring and know about any issues with your essential email services.

Port monitoring for your DNS server.

With port monitor watching your DNS port you always know whether essential DNS connection is okay.

Choose your preferred type of notifications.

Get instant alerts via email, SMS, voice call or through one of many integrations (such as Slack, Zapier, Splunk, etc.)

E-mail

E-mail is a basic form of outages notifications. Get alerted!

SMS

Get alerted instantly by SMS, even when you are offline!

Voice call

Get an automatic voice call alert whenever your website is down.

Slack

Slack messages are a great way to inform the entire team of a downtime.

Discord

Get important monitor status updates in your Discord messages.
...

and 10 more

We got integration for every popular service.

Advanced features for advanced users.

Recurring notifications

Set threshold and recurrence parameters so that you don't miss any serious outage.

Maintenance windows

Set up maintenance windows to pause the monitoring during the maintenance.

Incident management

Get a single overview of all incidents. Filter by status, root cause, or custom tags, tag teammates for instant collaboration, and push updates to your status pages.

Response time monitoring

See your response times in a chart and get alerts when your website or service responds slower than usual.

Multi-location checks

Create monitors with specific monitoring regions you can choose and catch issues that only appear in specific locations.

SMS and voice call notifications

No internet? We can call or text you when something goes wrong.

Easy setup: 4 clicks to create a port monitoring.

1. Create port monitoring

Choose the Cron job monitoring type and enter the URL, IP, or host to monitor.

2. Adjust the settings

You can set the monitoring intervals and timeout period or add a custom tag to group monitors.

3. Get notifications

By default, we will notify you via e-mail once monitor is down. Additionaly, you can setup any of 15 notification options incluing SMS or Slack.

Be the first who knows that your website is down. Reliable monitoring warns you before any significant troubles and saves you money.

Start monitoring in 30 seconds

All you really care about 
monitored in one place.

Website monitoring

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SSL monitoring

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Cron job monitoring

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Response time monitoring

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Ping monitoring

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Domain expiration monitoring

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Inform your customers about incidents with status pages.

Be transparent. Inform customers of planned outages. Show them that you strive to keep your service 100% online.

Check live demo Explore status pages

Add your team members to keep them notified.

You can invite all your team members to access your monitors, keep them notified and manage incidents. Choose from three levels of user access: read, write and notify-only.

Explore incident management

What users love about our port monitoring.

I've been using the service for about a month. It has a user-friendly android app. In free plan, they ping my domain every 5 minutes and if it is down, I'm notified on my phone...

I have been using UptimeRobot for monitoring websites and services hosted in AWS, specifically for general red light, yellow light, and green light monitoring...

It's easy, fast and comprehensive. I just need to know the address of the site I want to monitor and that's it!

Get inspired by the uses cases.

Improved network security by keeping an eye on open ports

Tracking status and performance of network devices

Enhanced troubleshooting and reduced incident response time

We strive for minimal downtime, but if something goes wrong UptimeRobot makes sure that we know about it quickly.

We switched to using UptimeRobot years ago as they offered the same services we were getting from a different provider but at a fraction of the cost.

Frequently asked questions.

Relevant articles.

Top 10 Port Monitoring Tools

Looking for the best cost-effective port monitoring that meets all your needs? Read our detailed guide focusing on key features and pricing.

Read more

Server Administrator’s Guide to POP3 and IMAP Monitoring

Monitor key mail server ports like POP3 and IMAP to enhance uptime and reduce costs. Discover essential monitoring tips.

Read more

SMTP Monitoring Uncovered

Why is SMTP monitoring important and key to maintaining secure and uninterrupted email services? Learn about the whole story on our blog.

Read more

Get your FREE account now, 50 monitors included!

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