Docker - Outgoing HTTPS requests timing out

Question

I am running my app using docker-compose. The app contains many containers. One container has a node.js app and other has a .net core app. When trying to send HTTPS requests to an outside server, from any of the containers, the request's timeout.

Docker is somehow blocking outgoing HTTPS requests.

On googling, everyone suggested changing MTU, so I changed it to 1400 but still no luck.

networks:
  backend:
    driver: bridge
    driver_opts:
      com.docker.network.driver.mtu: 1400

Answer 1

Finally to get it working I had to set the mtu to 1300 in docker-compose.yml file. Also had to update the docker config file

/etc/docker/daemon.json with value { "mtu": 1300 }