====== Docker Troubleshooting ======

===== Network reachability =====

==== Docker Service not reachable from outside the docker host ====

  * Check, if packets reach host
  * Check, if container is reachable from docker-host
  * Check ip-forwarding (sysctl net.ipv4.ip_forward)
  * Check iptables NAT & access rules
  * Check return route in container

==== Netshoot ====

[[https://github.com/nicolaka/netshoot|Repository]]
[[https://hub.docker.com/r/nicolaka/netshoot|Image]]

=== Basic Usage ===

== Start Container with Network Namespace of a running container ==
<code>
docker run -it --net container:<container_name> nicolaka/netshoot
</code>

== Start Container with Host Network Namespace ==
<code>
docker run -it --net host nicolaka/netshoot
</code>





{{tag>kb linux docker}}