Access application from outside created on dokku

Posted September 15, 2017 5.4k views
NginxNetworkingDokkuApplicationsUbuntu 16.04

I’ve created a dokku droplet and deployed a node app:

After deploy I cannot access the app from the outside either by using the IP:PORT or the domain:PORT

Ping the IP I get a response:

64 bytes from IP: icmp_seq=0 ttl=55 time=37.963 ms
64 bytes from IP: icmp_seq=1 ttl=55 time=38.982 ms
64 bytes from IP: icmp_seq=2 ttl=55 time=44.458 ms

When ssh the server I can see that the app is up and running:

dokku apps:report
=====> node-js-sample app information
       App dir:             /home/dokku/node-js-sample
       Git sha:             4d7f659
       App cid:             d215f9544d7b
       Status:              running

Curl the application from the DO server I can see the response:

curl http://IP:3767
Hello World!

Curl the application from the outside and there is no response.

Checking opened ports by nginx:

netstat -tanpl|grep nginx
tcp        0      0  *               LISTEN      7573/nginx -g daemo
tcp6       0      0 :::3767                 :::*                    LISTEN      7573/nginx -g daemo

No idea what I could do next. Any help is much appreciated.


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1 answer

Reading this post I finally understood the problem.

Looks like that UFW is enable by default and it only exposes certain ports.
I’ve added a new rule to enable the port of my application and it now works!

(/¯◡ ‿ ◡)/¯ ~ ┻━┻