Home » Announcements » New Feature – Monitoring Ports

New Feature – Monitoring Ports.

Written by Tomas Koprusak 211 words | 2 min read Updated Nov 13, 2025

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 : )

Written by
Tomas Koprusak

Product Owner |

He has worked for Sygic as a marketer and co-led the implementation and development of a product acquired from a competitor. He has also worked as a freelance developer, helping clients from various areas. Tomas brings a wealth of industry experience to our team. He spent a few years in the blockchain industry, leading projects and marketing teams at multiple blockchain-based companies. He has presented products and managed deals in more than 10 countries around the world, managed the ICO, and built a successful marketing team at Fuergy that continues to thrive. Tomas managed a product team for the biggest job site in Slovakia, covering development and transformation to a new B2B app. Not only is Tomas skilled at web development, but he also has a deep understanding of SaaS businesses, which makes him an invaluable asset in shaping and leading various projects at UptimeRobot. His focus is always on the continual improvement of our service and user experience. In addition to his professional achievements, Tomas is a devoted father. His personal interests include cycling (he traveled around the whole country of Slovakia), playing guitar (he even played in a band), servicing bikes, music, and enjoying good beer.

View author profile

Questions? Contact Support

Feature suggestions? Share

21 Comments

Avinash D'Souza Apr 4, 2011 at 9:12 am

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!

softlevel Apr 4, 2011 at 9:52 am

wow~ I love uptimerobot, it's best!

Omegatron Apr 4, 2011 at 10:48 am

Epic! Amazing for a free service :-)

Jeffrey Apr 4, 2011 at 1:19 pm

Great service! Thank you for that!

dan Apr 4, 2011 at 1:24 pm

Fantastic!

beben koben Apr 4, 2011 at 1:36 pm

wow...its a good news...

e-kostis Apr 4, 2011 at 6:19 pm

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

Arielle Apr 4, 2011 at 9:36 pm

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

terii Apr 5, 2011 at 2:39 pm

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

hayinvengeancegates Apr 9, 2011 at 2:33 pm

thanks........ i like it
nice info.....

Nicola Hamwi Apr 11, 2011 at 8:14 pm

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

Ty May 6, 2011 at 3:40 pm

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

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

Andrew Jun 2, 2011 at 11:08 am

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 host-tracker.com that show uptime and link back to uptimerobot.com. 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