You can see the iptable NAT rules by running the following command on host system: sudo iptables -t nat -L A NAT rule is used to forward traffic to external hosts and the host machine must be set up to forward IP packets. This new interface will be connected to the eth0 interface on the container and allow networking between containers by adding iptable rules. When docker starts a container, it creates a virtual interface on host system with unique name like vethef766ac, and assign IP address within the same subnet. Valid_lft forever preferred_lft forever Basic Container Networking Inet6 fe80::4ebb:58ff:fe9c:f555/64 scope linkģ: docker0: mtu 1500 qdisc noqueue state DOWN group default You should see the output like this: 1: lo: mtu 65536 qdisc noqueue state UNKNOWN group default You can easily find out the docker bridge interface and IP address by running the following command: sudo ip a Docker assigns the IP address 172.17.0.2/16 to the bridge interface docker0 which acts as a subnet for all the IP addresses of the running containers. Find the Docker Interfaceīy default docker creates a bridge interface - docker0 on the host system when the docker process starts up. The host network adds a container on the hosts network stack. The none network adds a container to a container-specific network stack. The bridge network represents the docker0 network present in all Docker installations.
DOCKER NETWORK HOST OR BRIDGE DRIVER
You should see the following output: NETWORK ID NAME DRIVER You can list these networks by simply running the following command: sudo docker network ls
DOCKER NETWORK HOST OR BRIDGE INSTALL
When you install docker, it creates three networks automatically. A non-root user account with sudo privilege set up on your serverĭocker creates a pair of virtual Ethernet interfaces on each container, randomly assigning them an IP address and a subnet from a private address range not already used by the host system.
![docker network host or bridge docker network host or bridge](https://kb.novaordis.com/images/f/f7/DockerNetworkingUserDefinedBridge.png)