Question

Why would port 80 come up closed from a digitalocean VPS but not from the web?

If I am on a computer at home, I can go to http://164.92.121.50 And if from a windows or linux computer at home I do

C:\blah>nmap -p80 164.92.121.50    

or

$nmap -p80 164.92.121.50

Then it shows as open

And I can do wget 164.92.121.50

However, if I try from a DigitalOcean VPS

It doesn’t work


> root@ubuntu-s-1vcpu-1gb-lon1-01:~# wget 164.92.121.50 
> --2022-09-12 05:03:03--  http://164.92.121.50/
> Connecting to 164.92.121.50:80... ^C
> 
> 
> root@ubuntu-s-1vcpu-1gb-lon1-01:~# nmap -p80 164.92.121.50 
> Starting Nmap 7.80 ( https://nmap.org ) at 2022-09-12 05:03 UTC
> Nmap scan report for 164.92.121.50
> Host is up (0.14s latency).
> 
> PORT   STATE    SERVICE
> 80/tcp filtered http
> 
> Nmap done: 1 IP address (1 host up) scanned in 1.77 seconds
> root@ubuntu-s-1vcpu-1gb-lon1-01:~# 
> `

```




Submit an answer


This textbox defaults to using Markdown to format your answer.

You can type !ref in this text area to quickly search our full set of tutorials, documentation & marketplace offerings and insert the link!

Sign In or Sign Up to Answer

These answers are provided by our Community. If you find them useful, show some love by clicking the heart. If you run into issues leave a comment, or add your own answer to help others.

Sorry, turned out that from my home computer I could access it, but everybody else couldn’t. I had a firewall rule on the VPS that only my IP could access port 80.

I was checking the firewall before but I was only checking the firewall on the VPS I was checking from! I should have checked the firewall on the server itself!

alexdo
Site Moderator
Site Moderator badge
September 12, 2022

Hello @userdo

You can also double-check if there are no Firewall rules in place that can cause such behaviour.

Regards

KFSys
Site Moderator
Site Moderator badge
September 12, 2022

Hi @userdo,

Are you sure the port from the DigitalOcean Droplet is not closed and thus not allowing you to reach other ports on different machines?

I see this as the only explanation.

Try DigitalOcean for free

Click below to sign up and get $200 of credit to try our products over 60 days!

Sign up