If I am on a computer at home, I can go to
And if from a windows or linux computer at home I do
C:\blah>nmap -p80 220.127.116.11
$nmap -p80 18.104.22.168
Then it shows as open
And I can do wget 22.214.171.124
However, if I try from a DigitalOcean VPS
It doesn’t work
> root@ubuntu-s-1vcpu-1gb-lon1-01:~# wget 126.96.36.199 > --2022-09-12 05:03:03-- http://188.8.131.52/ > Connecting to 184.108.40.206:80... ^C > > > root@ubuntu-s-1vcpu-1gb-lon1-01:~# nmap -p80 220.127.116.11 > Starting Nmap 7.80 ( https://nmap.org ) at 2022-09-12 05:03 UTC > Nmap scan report for 18.104.22.168 > 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:~# > ` ```
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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!
You can also double-check if there are no Firewall rules in place that can cause such behaviour.
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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.