Question about iptables and docker

[Thorsten Gehrig]

Hi

i have on my unraid also dockers setup as "Network type: custom (bro)" and Fixed IP Address (example) 192.168.0.20 while unraid itself does run un 192.168.0.10.

This works like a charm - BUT only docker containers cannot connect to those IP Address. Other clients in the network have no issue.

As I'm nowadays transferred my reverse-proxy into a docker - those docker cannot connect to the example docker session.

 

I´m guessing this is due to IP-Tables?

I´m guessing the chain "DOCKER" doesn't accept any packages traveling from a 172.17.0.0/24 container to another container which is e.g. 192.168.0.20 ... but i haven't enough clue on the detailed routing.

Does anyone can provide me a hint? (where to look, what to try)

And finally: how can i make any iptables rules persistant?

 

Thank you in advance

Kind regards

Thorsten Gehrig