Use bridge networks
In terms of networking, a bridge network is a Link Layer device which forwards traffic between network segments. A bridge can be a hardware device or a software device running...
docs.docker.com
Enable forwarding from Docker containers to the outside world
By default, traffic from containers connected to the default bridge network is not forwarded to the outside world. To enable forwarding, you need to change two settings. These are not Docker commands and they affect the Docker host’s kernel.
- Configure the Linux kernel to allow IP forwarding.
- $ sysctl net.ipv4.conf.all.forwarding=1
- Change the policy for the iptables FORWARD policy from DROP to ACCEPT.
- $ sudo iptables -P FORWARD ACCEPT
These settings do not persist across a reboot, so you may need to add them to a start-up script.
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