If you're in a hurry, maybe you'd rather go through the [static](../reference/static-configuration.md) and the [dynamic](../reference/dynamic-configuration/docker.md) configuration references.
Traefik requires access to the docker socket to get its dynamic configuration.
??? warning "Security Notes"
Depending on your context, accessing the Docker API without any restriction can be a security concern: If Traefik is attacked, then the attacker might get access to the Docker (or Swarm Mode) backend.
As explained in the Docker documentation: ([Docker Daemon Attack Surface page](https://docs.docker.com/engine/security/security/#docker-daemon-attack-surface)):
`[...] only **trusted** users should be allowed to control your Docker daemon [...]`
[TraefikEE](https://containo.us/traefikee) solves this problem by separating the control plane (connected to Docker) and the data plane (handling the requests).
- [KubeCon EU 2018 Keynote, Running with Scissors, from Liz Rice](https://www.youtube.com/watch?v=ltrV-Qmh3oY)
- [Don't expose the Docker socket (not even to a container)](https://www.lvh.io/posts/dont-expose-the-docker-socket-not-even-to-a-container.html)
- [A thread on Stack Overflow about sharing the `/var/run/docker.sock` file](https://news.ycombinator.com/item?id=17983623)
- [To Dind or not to DinD](https://blog.loof.fr/2018/01/to-dind-or-not-do-dind.html)
??? tip "Security Compensation"
Expose the Docker socket over TCP, instead of the default Unix socket file.
It allows different implementation levels of the [AAA (Authentication, Authorization, Accounting) concepts](https://en.wikipedia.org/wiki/AAA_(computer_security)), depending on your security assessment:
- Accounting at kernel level, by enforcing kernel calls with mechanisms like [SELinux](https://en.wikipedia.org/wiki/Security-Enhanced_Linux), to only allows an identified set of actions for Traefik's process (or the "socket exposer" process).
Traefik routes requests to the IP/Port of the matching container.
When setting `usebindportip=true`, you tell Traefik to use the IP/Port attached to the container's _binding_ instead of its inner network IP/Port.
When used in conjunction with the `traefik.port` label (that tells Traefik to route requests to a specific port), Traefik tries to find a binding on port `traefik.port`.
If it can't find such a binding, Traefik falls back on the internal network IP of the container, but still uses the `traefik.port` that is set in the label.
??? example "Examples of `usebindportip` in different situations."
| traefik.port label | Container's binding | Routes to |
In the above table, ExtIp stands for "external IP found in the binding", IntIp stands for "internal network container's IP", ExtPort stands for "external Port found in the binding", and IntPort stands for "internal network container's port."
To update the configuration of the Router automatically attached to the container, add labels starting with `traefik.http.routers.{name-of-your-choice}.` and followed by the option you want to change. For example, to change the rule, you could add the label `traefik.http.routers.my-container.rule=Host(my-domain)`.
To update the configuration of the Service automatically attached to the container, add labels starting with `traefik.http.services.{name-of-your-choice}.`, followed by the option you want to change. For example, to change the load balancer method, you'd add the label `traefik.http.services.{name-of-your-choice}.loadbalancer.method=drr`.
You can declare pieces of middleware using labels starting with `traefik.http.middlewares.{name-of-your-choice}.`, followed by the middleware type/options. For example, to declare a middleware [`schemeredirect`](../middlewares/redirectscheme.md) named `my-redirect`, you'd write `traefik.http.middlewares.my-redirect.schemeredirect.scheme: https`.
If you declare a TCP Router/Service, it will prevent Traefik from automatically create an HTTP Router/Service (like it does by default if no TCP Router/Service is defined).
You can declare both a TCP Router/Service and an HTTP Router/Service for the same container (but you have to do so manually).
If a container is linked to several networks, be sure to set the proper network name (you can check this with `docker inspect <container_id>`), otherwise it will randomly pick one (depending on how docker is returning them).
