Connection timed out

Could you paste the nmap output? Removing any sensitive information if needed.

Starting Nmap 6.40 ( http://nmap.org ) at 2018-02-20 11:23 CET
Nmap scan report for XX.XX.XX.XX
Host is up (0.00095s latency).
PORT STATE SERVICE
8081/tcp filtered blackice-icecap
MAC Address: YY:YY:YY:YY:YY:YY (Unknown)

Nmap done: 1 IP address (1 host up) scanned in 0.08 seconds

the mac address is the good one but the state is filtered, i dont know what it’s mean

On the curl commands you pasted you are accessing nginx on port 80 meanwhile on the nmap you are trying to access port 8081 there is some mismatch there on the ports.

ok my bad, i tried a local curl on 8081 and it failed

When connecting to a website, if Google Chrome browser fails to fetch the website to the browser, it throws an error saying “This site can’t be reached Error” – ERR_CONNECTION_TIMED_OUT. It means the server is taking too much time to replying. The main reason behind this error is your computer can’t be able to access the internet connection or maybe something blocking your network to establishing a connection. Apart from the Network issue, there can be multiple reasons why this error shows up. Before going to any fix, please make sure the server you want to open is exist. If server exist, there are numerous solutions which can be used to solve this error.

Clear your Chrome browsing data
Check your Network Cables, Restart your Router and Reconnect
Check your Windows Host File
Remove Proxy
Flush DNS and reset TCP/IP
Run Chrome Cleanup Tool