New Feature – Monitoring Ports

Here comes a “frequently requested feature”: Monitoring Ports.

Uptime Robot now enables you to monitor any port/service (like HTTP, FTP, DNS, SMTP, POP, IMAP, etc.) and find out if they are responding or not.

Under the re-organized “Add New Monitor” menu, the feature can be reached by simply selecting “TCP Ports”.

After that, Uptime Robot will be displaying a list of pre-defined/popular ports and the ability to define a custom port.


There are usually 2 status options while monitoring a service, it can be:

  • up
  • or down

However, there is a 3rd option from Uptime Robot‘s point of view: it can also be filtered/firewalled. Simply, it can be up or down but the status can not be detected as any requests (like Uptime Robot does) are blocked.

Good news is; if the port/service is behind a firewall and blocks any requests, inside the “down” e-mail notification, you’ll see that Uptime Robot mentions this information.

So, if you have the chance of whitelisting IPs that can reach to the port. If you prefer to, whitelisting Uptime Robot‘s IPs would help the monitor to work (IPs can be found in the “About” page.).

Hope you like this new feature and, now, we can focus on some more tasty stuff : )

If you find Uptime Robot useful, help us spreading the word:


  1. Avinash D'Souza

    It’s still hard to believe that this is a free service. I love the fact that you guys add on a new feature every couple of weeks! Thanks a ton guys!

  2. softlevel

    wow~ I love uptimerobot, it’s best!

  3. Omegatron

    Epic! Amazing for a free service :-)

  4. Pingback: UptimeRobot kann nun auch Ports überwachen

  5. Jeffrey

    Great service! Thank you for that!

  6. dan


  7. e-kostis

    exactly what I was looking for!
    Keep up the good and FREE work!

  8. Arielle

    Great development!
    I hope we could have more than 100 sites to track and this remains free. :)

  9. terii

    Amazing service and development as always. Thank you very much!

  10. Nicola Hamwi

    Thumbs up!! 5 Stars, i’m sure you’ll get 8 PR on Google really soon, and you’re doing an amazing job!

  11. Ty

    This is EXACTLY what I was looking for!!! Thank you!

    Now… is anyone working on an iphone app? :) Because that would be freaking awesome…

  12. Andrew

    Hey There, just started using your service. Looks great so far. One addition that would be helpful for me and also help you advertise for free would be little widgets or buttons similar to that show uptime and link back to Making these look and function great could get you a free advertising spot on many of the websites you track! I know I’d post them up. =)

    Thanks for your service,
    - Andrew

  13. admin Post author


    We’ll definitely be adding a widget option. ALso, with the to-be-released-API, anyone can code custom widgets too.

  14. Karin

    Awesome! Have you found any investors already?

  15. admin Post author


    Nope, not yet (an investor that solves the issue fully) but still searching..

  16. Rahul

    I have added a custom PORT 783 to monitor, I have also Allowed this port from my server Firewall but uptimeronot still showing it Offline.

    I have doubled check everything but its not working at all.

    How to fix this issue?


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