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robbertkl / docker-ipv6nat

Extend Docker with IPv6 NAT, similar to IPv4
MIT License
661 stars 48 forks source link

Container has always latest added ipvt #18

Closed blockmover closed 6 years ago

blockmover commented 6 years ago

Thanks Robbert for the tool it's really really great and it help me a lot. I run several containers and each gets a unique network and should connect to the outside world with it a dedicated ipv6 from the host. When I run your container all my other container use the latest ipv6 from the host. To fix that I had to run sudo ip6tables -t nat -I POSTROUTING -s fd00:dead:ab::/48 -j SNAT --to-source [ipv6 address] then it worked. Maybe you can have a look at it.

here the command I used to create the network docker network create --ipv6 --subnet fd00:dead:ab::/48 --gateway fd00:dead:ab::1 -o "com.docker.network.bridge.host_binding_ipv6"="[ipv6 address" bridge_container1_ipv6

robbertkl commented 6 years ago

Hi @blockmover, thanks for reporting!

I don't have that issue myself, it works without the SNAT rule here. Let's figure out what's different from your setup and why it's needed.

What about IPv4. Does your docker also add a similar rule to your IPv4 iptables? (check output of iptables-save)

If you know how and when this rule is needed, a PR for this project would also be very welcome!

robbertkl commented 6 years ago

Closed due to inactivity. Just reopen if needed.