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Discussion on: Access host from a docker container

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axcairns profile image
axcairns

I figured it out. Nothing wrong with your solution. I have my host firewall locked down tight. Port 80 (which is the host service I was trying to access) is locked to only my LAN network. Adding the docker container network shared by all my containers to the firewall rules fixed it.

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gonzalo2683 profile image
Gonzalo Guevara

Could you show the example of how to allow the connection?

I have the same problem, if I try curl host.docker.internal I get
curl: (7) Failed to connect to host.docker.internal port 80: Connection refused

I am linux

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axcairns profile image
axcairns

Been a while so I'm hazy. From memory my docker containers were running on 192.168.0.0/24 while my LAN is on 192.168.1.0/24. I just needed to tell ufw to allow access to that port from 192.168.0.0/24

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jamescook profile image
james-cook

I had exactly the same problem.
Confusingly ping was working from the container but e.g. wget and traceroute etc. were not (a good indication of a firewall "problem").

In my set-up the solution was:

ufw allow in to 172.17.0.0/16 proto tcp port 8084

where 172.17.0.1 is the docker0 IP address and 8084 the port on the host machine.