Connect To Own Machine within docker

Hey, I got a quite weird problem with a docker container on a droplet.

The container runs a webserver with php. When I want to get a file via http (by the public url, not by “localhost”) I always run into timeouts.

For example: wget http://dogvers.flarandr.de/wp-json/ens/v1/zipcity/12163 never returns something. When I retreave the URL inside my Browser its works fine. The DNS resolution also seems to woks perfectly.

I Also tried to establish a telnet connection to port 80. It works from outside, but not from inside the container.

traceroute (from inside the container) returns the following:

traceroute to 167.71.53.86 (167.71.53.86), 30 hops max, 60 byte packets
 1  * * *
 2  * * *
 3  * * *
 4  * * *
 5  * * *
 6  * * *
 7  * * *
 8  * * *
 9  * * *
10  * * *
[... and so on]

So its not very helpful.

I use the exact same image on another machine (not digitalocean) an there it works.

Do you have any ideas to fix this?