[CentOS] PostgreSQL port accessible even though it should be blocked by firewall

[Alexander Dalloz]

Am 29.10.2018 um 20:03 schrieb Frank Thommen:
> PostgreSQL is running in a docker container:
> 
> $ docker ps
> CONTAINER ID        IMAGE                         COMMAND   
> CREATED             STATUS              PORTS                    NAMES
> 6f11fc41d2f0        postgres                  "docker-entrypoint..."   4 
> days ago          Up 4 days           0.0.0.0:5432->5432/tcp   postgres
> $
> 
> 
> The various docker interfaces and virtual bridges are not assigned to 
> any specific zone.
> 
> 
> Why is port 5432/tcp open?

You will see it if you check the netfilter rules with:

iptables -L -n -v --line -t filter
iptables -L -n -v --line -t nat

> frank

Alexander